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National Instruments NI 6221, User Manual

The National Instruments NI 6221 is a high-performance multifunction data acquisition device. For a comprehensive understanding of its features and functionality, users can easily download the user manual for free from our website manualshive.com. Unlock the full potential of your NI 6221 with our detailed and accessible manual.

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Chapter 10

Bus Interface

M Series User Manual

10-4

ni.com

compatible as long as those terminals on the sub-bus are disabled by default 
and never enabled.

Caution

Damage can result if these lines are driven by the sub-bus. NI is 

not

 liable for any 

damage resulting from improper signal connections.

Data Transfer Methods

(NI PCI/PCIe/PXI/PXIe Devices)

 The three primary ways to transfer data across 

the PCI bus are direct memory access (DMA), interrupt request (IRQ), and 
programmed I/O:

•

Direct Memory Access (DMA)

—DMA is a method to transfer data 

between the device and computer memory without the involvement of 
the CPU. This method makes DMA the fastest available data transfer 
method. NI uses DMA hardware and software technology to achieve 
high throughput rates and increase system utilization. DMA is the 
default method of data transfer for PCI/PCIe/PXI/PXIe devices.

•

Interrupt Request (IRQ)

—IRQ transfers rely on the CPU to service 

data transfer requests. The device notifies the CPU when it is ready to 
transfer data. The data transfer speed is tightly coupled to the rate at 
which the CPU can service the interrupt requests. If you are using 
interrupts to transfer data at a rate faster than the rate the CPU can 
service the interrupts, your systems may start to freeze.

•

Programmed I/O

—Programmed I/O is a data transfer mechanism 

where the user’s program is responsible for transferring data. Each 
read or write call in the program initiates the transfer of data. 
Programmed I/O is typically used in software-timed (on-demand) 
operations. Refer to the 

Software-Timed Generations

 section of 

Chapter 5, 

Analog Output

, for more information.

(USB Devices)

 The two primary ways to transfer data across the USB bus are 

USB Signal Stream and programmed I/O:

•

USB Signal Stream

—USB Signal Stream is a method to transfer data 

between the device and computer memory using USB bulk transfers 
without intervention of the microcontroller on the NI device. NI uses 
USB Signal Stream hardware and software technology to achieve high 
throughput rates and increase system utilization in USB devices.

•

Programmed I/O

—Programmed I/O is a data transfer mechanism 

where the user’s program is responsible for transferring data. Each 
read or write call in the program initiates the transfer of data. 
Programmed I/O is typically used in software-timed (on-demand) 

Summary of Contents for NI 6221

Page 1: ...DAQ M Series M Series User Manual NI 622x NI 625x and NI 628x Devices M Series User Manual June 2007 371022H 01 ...

Page 2: ... Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 495 783 6851 Singapore 1800 226 5886 Slovenia 386 3 425 42 00 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 2005151 Taiwan 886 02 2377 2222 Thailand ...

Page 3: ... storing in an information retrieval system or translating in whole or in part without the prior written consent of National Instruments Corporation National Instruments respects the intellectual property of others and we ask our users to do the same NI software is protected by copyright and other intellectual property laws Where NI software may be used to reproduce software or other materials bel...

Page 4: ...nt of Communications DOC Changes or modifications not expressly approved by NI could void the user s authority to operate the equipment under the FCC Rules Class A Federal Communications Commission This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against ha...

Page 5: ...el to USB 622x 625x Screw Terminal Devices 1 2 USB Cable Strain Relief 1 3 Chapter 2 DAQ System Overview DAQ Hardware 2 1 DAQ STC2 and DAQ 6202 2 2 Calibration Circuitry 2 3 Signal Conditioning 2 3 Sensors and Transducers 2 3 Signal Conditioning Options 2 4 SCXI 2 4 SCC 2 5 5B Series 2 5 Cables and Accessories 2 6 Custom Cabling 2 6 Programming Devices in Software 2 7 Chapter 3 Connector and LED I...

Page 6: ...nimize Voltage Step between Adjacent Channels 4 10 Avoid Scanning Faster Than Necessary 4 10 Example 1 4 10 Example 2 4 10 Analog Input Data Acquisition Methods 4 11 Software Timed Acquisitions 4 11 Hardware Timed Acquisitions 4 11 Buffered 4 11 Non Buffered 4 12 Analog Input Triggering 4 12 Connecting Analog Input Signals 4 13 Connecting Floating Signal Sources 4 15 What Are Floating Signal Sourc...

Page 7: ...External Source 4 29 Routing AI Sample Clock Signal to an Output Terminal 4 29 Other Timing Requirements 4 29 AI Sample Clock Timebase Signal 4 30 AI Convert Clock Signal 4 31 Using an Internal Source 4 32 Using an External Source 4 32 Routing AI Convert Clock Signal to an Output Terminal 4 32 Using a Delay from Sample Clock to Convert Clock 4 32 Other Timing Requirements 4 33 AI Convert Clock Tim...

Page 8: ... Source 5 9 Using an Analog Source 5 10 Routing AO Pause Trigger Signal to an Output Terminal 5 10 AO Sample Clock Signal 5 10 Using an Internal Source 5 10 Using an External Source 5 10 Routing AO Sample Clock Signal to an Output Terminal 5 10 Other Timing Requirements 5 11 AO Sample Clock Timebase Signal 5 11 Getting Started with AO Applications in Software 5 12 Chapter 6 Digital I O Static DIO ...

Page 9: ...easurement 7 8 Single Semi Period Measurement 7 8 Buffered Semi Period Measurement 7 8 Frequency Measurement 7 9 Method 1 Measure Low Frequency with One Counter 7 9 Method 1b Measure Low Frequency with One Counter Averaged 7 10 Method 2 Measure High Frequency with Two Counters 7 11 Method 3 Measure Large Range of Frequencies Using Two Counters 7 12 Choosing a Method for Measuring Frequency 7 13 Po...

Page 10: ...unter n Z Signal to an Output Terminal 7 28 Counter n Up_Down Signal 7 29 Counter n HW Arm Signal 7 29 Routing Signals to Counter n HW Arm Input 7 29 Counter n Internal Output and Counter n TC Signals 7 29 Routing Counter n Internal Output to an Output Terminal 7 30 Frequency Output Signal 7 30 Routing Frequency Output to a Terminal 7 30 Default Counter Timer Pinouts 7 30 Counter Triggering 7 31 A...

Page 11: ...Digital Routing and Clock Generation Clock Routing 9 1 80 MHz Timebase 9 2 20 MHz Timebase 9 2 100 kHz Timebase 9 2 External Reference Clock 9 2 10 MHz Reference Clock 9 3 Synchronizing Multiple Devices 9 3 Real Time System Integration RTSI 9 4 RTSI Connector Pinout 9 4 Using RTSI as Outputs 9 6 Using RTSI Terminals as Timing Input Signals 9 6 RTSI Filters 9 7 PXI Clock and Trigger Signals 9 8 PXI...

Page 12: ...nalog Trigger Types 11 3 Analog Edge Triggering 11 4 Analog Edge Triggering with Hysteresis 11 4 Analog Edge Trigger with Hysteresis Rising Slope 11 5 Analog Edge Trigger with Hysteresis Falling Slope 11 5 Analog Window Triggering 11 6 Analog Trigger Accuracy 11 7 Appendix A Device Specific Information NI 6220 A 2 NI 6221 A 7 NI 6224 A 24 NI 6225 A 30 NI 6229 A 45 NI 6250 A 61 NI 6251 A 66 NI 6254...

Page 13: ...9 Screw Terminal Pinout A 52 Figure A 19 USB 6229 BNC Top Panel and Pinout A 55 Figure A 27 PCI PXI 6250 Pinout A 62 Figure A 28 NI PCI PCIe PXI PXIe 6251 Pinout A 67 Figure A 29 USB 6251 Screw Terminal Pinout A 71 Figure A 30 USB 6251 BNC Top Panel and Pinout A 74 Figure A 39 USB 6251 Mass Termination Pinout A 82 Figure A 40 PCI PXI 6254 Pinout A 87 Figure A 41 PCI PXI 6255 Pinout A 93 Figure A 4...

Page 14: ...Page Setup item and select Options from the last dialog box This icon denotes a note which alerts you to important information This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system crash When this symbol is marked on a product refer to the Read Me First Safety and Radio Frequency Interference for information about precautions to take bold Bold t...

Page 15: ...your NI DAQmx supported DAQ device and how to confirm that your device is operating properly Select Start All Programs National Instruments NI DAQ DAQ Getting Started Guide The NI DAQ Readme lists which devices are supported by this version of NI DAQ Select Start All Programs National Instruments NI DAQ NI DAQ Readme The NI DAQmx Help contains general information about measurement concepts key NI ...

Page 16: ...mx Base software your NI DAQmx Base supported DAQ device and how to confirm that your device is operating properly on your Mac Linux machine The NI DAQmx Base Readme lists which devices are supported by this version of NI DAQmx Base In Windows select Start All Programs National Instruments NI DAQmx Base DAQmx Base Readme The NI DAQmx Base VI Reference Help contains VI reference and general informa...

Page 17: ... NI DAQmx Getting Started Getting Started with DAQ Includes overview information and a tutorial to learn how to take an NI DAQmx measurement in LabVIEW using the DAQ Assistant VI and Function Reference Measurement I O VIs and Functions Describes the LabVIEW NI DAQmx VIs and properties Taking Measurements Contains the conceptual and how to information you need to acquire and analyze measurement dat...

Page 18: ...t Studio refer to the NI Measurement Studio Help which is fully integrated with the Microsoft Visual Studio NET help To view this help file in Visual Studio NET select Measurement Studio NI Measurement Studio Help To create an application in Visual C Visual C or Visual Basic NET follow these general steps 1 In Visual Studio NET select File New Project to launch the New Project dialog box 2 Find th...

Page 19: ...w conceptual topics for using NI DAQmx with Visual C and Visual Basic NET To get to the same help topics from within Visual Studio go to Help Contents Select Measurement Studio from the Filtered By drop down list and follow the previous instructions Device Documentation and Specifications The NI 622x Specifications contains all specifications for the NI 6220 NI 6221 NI 6224 NI 6225 and NI 6229 M S...

Page 20: ... on the Web For additional support refer to ni com support or zone ni com Note You can download these documents at ni com manuals DAQ specifications and some DAQ manuals are available as PDFs You must have Adobe Acrobat Reader with Search and Accessibility 5 0 5 or later installed to view the PDFs Refer to the Adobe Systems Incorporated Web site at www adobe com to download Acrobat Reader Refer to...

Page 21: ...are you plan to use with the device Installing NI DAQmx The DAQ Getting Started Guide which you can download at ni com manuals offers NI DAQmx users step by step instructions for installing software and hardware configuring channels and tasks and getting started developing an application Installing Other Software If you are using other software refer to the installation instructions that accompany...

Page 22: ...es devices Device Accessories and Cables NI offers a variety of accessories and cables to use with your DAQ device Refer to Appendix A Device Specific Information or ni com for more information Applying the Signal Label to USB 622x 625x Screw Terminal Devices USB 622x 625x Screw Terminal Devices The supplied signal label can be adhered to the inside cover of the USB 622x 625x Screw Terminal device...

Page 23: ...strain relief hardware to provide strain relief for your USB cable Adhere the cable tie mount to the rear panel of the USB 622x 625x Screw Terminal or USB 622x 625x Mass Termination device as shown in Figure 1 2 Thread a zip tie through the cable tie mount and tighten around the USB cable Figure 1 2 USB Cable Strain Relief on USB 622x 625x Screw Terminal and USB 622x 625x Mass Termination Devices ...

Page 24: ...ough two of the strain relief holes on the end cap to provide strain relief for your USB cable as shown in Figure 1 3 The strain relief holes can also be used as cable management for signal wires to from the screw terminals and BNC connectors Figure 1 3 USB Cable Strain Relief on USB 622x 625x BNC Devices ...

Page 25: ...ftware and PC The following sections cover the components of a typical DAQ system Figure 2 1 Components of a Typical DAQ System DAQ Hardware DAQ hardware digitizes signals performs D A conversions to generate analog output signals and measures and controls digital I O signals Figure 2 2 features components common to all M Series devices Sensors and Transducers Signal Conditioning DAQ Hardware Pers...

Page 26: ...uting of RTSI signals for multi device synchronization Generation and routing of internal and external timing signals Two flexible 32 bit counter timer modules with hardware gating Digital waveform acquisition and generation Static DIO signals True 5 V high current drive DO DI change detection PLL for clock synchronization Seamless interface to signal conditioning accessories PCI PXI interface Ind...

Page 27: ...clicking Manual Calibration Procedures on ni com calibration Signal Conditioning Many sensors and transducers require signal conditioning before a measurement system can effectively and accurately acquire the signal The front end signal conditioning system can include functions such as signal amplification attenuation filtering electrical isolation simultaneous sampling and multiplexing In additio...

Page 28: ...gnal conditioning and switching system for various measurement devices including M Series devices An SCXI system consists of a rugged chassis that houses shielded signal conditioning modules that amplify filter isolate and multiplex analog signals from thermocouples or other transducers SCXI is designed for large measurement systems or systems requiring high speed acquisition System features inclu...

Page 29: ...cquire signals at rates up to 1 25 MHz Connectivity Incorporates panelette technology to offer custom connectivity to thermocouple BNC LEMO B Series and MIL Spec connectors Note PCI Express users should consider the power limits on certain SCC modules without an external power supply Refer to the specifications for your device and the Disk Drive Power Connector section of Chapter 3 Connector and L...

Page 30: ...fic information about these products refer to ni com Refer to the Custom Cabling section of this chapter the Field Wiring Considerations section of Chapter 4 Analog Input and Appendix A Device Specific Information for information about how to select accessories for your M Series device Custom Cabling NI offers cables and accessories for many applications However if you want to develop your own cab...

Page 31: ...er Each driver has its own API hardware configuration and software configuration Refer to the DAQ Getting Started Guide for more information about the two drivers NI DAQmx includes a collection of programming examples to help you get started developing an application You can modify example code and save it in an application You can use examples to develop a new application or add example code to a...

Page 32: ... and E Series Pinout Comparison 5 V Power Source Disk Drive Power Connector and RTSI Connector Pinout sections contain information about M Series connectors The USB Device Fuse Replacement and LED Patterns sections refer to M Series USB device fuses and LEDs Refer to Appendix A Device Specific Information for device I O connector pinouts ...

Page 33: ...is AI SENSE 2 For differential measurements AI 0 and AI 8 are the positive and negative inputs of differential analog input channel 0 Similarly the following signal pairs also form differential input channels AI 1 AI 9 AI 2 AI 10 AI 3 AI 11 AI 4 AI 12 AI 5 AI 13 AI 6 AI 14 AI 7 AI 15 AI 16 AI 24 AI 17 AI 25 AI 18 AI 26 AI 19 AI 27 AI 20 AI 28 AI 21 AI 29 AI 22 AI 30 AI 23 AI 31 AI 32 AI 40 AI 33 A...

Page 34: ...ternal offset or reference inputs These functions are not available on all devices Refer to the specifications for your device 5 V D GND Input or Output 5 V Power Source These terminals provide a fused 5 V power source PFI 0 7 P1 0 7 PFI 8 15 P2 0 7 D GND Input or Output Programmable Function Interface or Digital I O Channels 0 to 7 and Channels 8 to 15 Each of these terminals can be individually ...

Page 35: ... cable s shield wire to CHS GND for a ground connection NC No connect Do not connect signals to these terminals USB 62xx Screw Terminal users can connect the shield of a shielded cable to the chassis ground lug for a ground connection The chassis ground lug is not available on all device versions Table 3 1 I O Connector Signals Continued Signal Name Reference Direction Description ...

Page 36: ...ls On M Series devices you also can use these terminals as digital I O signals Also refer to Chapter 8 PFI 2 CTR 0 OUT GPCTR0_OUT PFI 12 P2 4 40 CTR 1 OUT GPCTR1_OUT PFI 13 P2 5 45 EXT STROBE PFI 10 P2 2 46 AI HOLD COMP SCANCLK PFI 11 P2 3 3 PFI 9 CTR 0 GATE GPCTR0_GATE PFI 9 P2 1 As a PFI input the functionality of E Series and M Series devices is similar for these terminals E Series devices can ...

Page 37: ...ol the up down signal of general purpose Counters 0 and 1 respectively On M Series devices you have to use one of the PFI terminals to control the up down signal of general purpose Counters 0 and 1 48 P0 7 P0 7 20 AO EXT REF EXTREF APFI 0 On E Series devices this terminal is the external reference input for the AO circuitry On M Series devices this terminal can be used as the external reference in...

Page 38: ...nd or to any other voltage source on the M Series device or any other device Doing so can damage the device and the computer NI is not liable for damage resulting from such a connection The power rating on most devices is 4 75 to 5 25 VDC at 1 A Refer to the specifications document for your device to obtain the device power rating Note NI PCIe 625x Devices Only M Series PCI Express devices supply ...

Page 39: ...d more power than listed in the device specifications You are using an SCC accessory without an external power supply such as the SC 2345 Refer to the specifications document for your device for more information about PCI Express power requirements and power limits Disk Drive Power Connector Installation Before installing the disk drive power connector you must install and set up the M Series PCI ...

Page 40: ...he disk drive power connector can affect the analog performance of your device To compensate for this NI recommends that you self calibrate after connecting or disconnecting the disk drive power connector USB Device Fuse Replacement M Series USB devices have a replaceable 2A 250V 5 20 mm fuse USB 62xx Screw Terminal Devices To remove the fuse from the USB 62xx Screw Terminal complete the following...

Page 41: ...nnector and LED Information M Series User Manual 3 10 ni com 3 Replace the fuse while referring to Figure 3 2 for the fuse location Figure 3 2 USB 62xx Screw Terminal Fuse Location 4 Replace the lid and screws Fuse ...

Page 42: ...screwing the four sockethead cap screws with a 7 64 in hex wrench Note The end pieces are attached using self threading screws Repeated screwing and unscrewing of self threading screws will produce a compromised connection 3 With a Phillips 2 screwdriver remove the Phillips 4 40 screw adjacent to the USB connector 4 Remove the nut from the power connector 5 Remove the four Phillips 4 40 screws tha...

Page 43: ...g the device 2 Loosen the four Phillips screws that attach the lid to the enclosure and remove the lid 3 Replace the fuse while referring to Figure 3 4 for the fuse location Figure 3 4 USB 62xx Mass Termination Fuse Location 4 Replace the lid and screws RTSI Connector Pinout Refer to the RTSI Connector Pinout section of Chapter 9 Digital Routing and Clock Generation for information about the RTSI ...

Page 44: ...he behavior of the LEDs Note USB 62xx BNC devices also have a POWER 5 V LED on the top panel The POWER 5 V LED indicates device power Table 3 3 LED Patterns POWER 5 V LED ACTIVE LED READY LED USB Device State Off Off Off The device is not powered On Off Off The device is powered but not connected to the host computer On Off On The device is configured but there is no activity over the bus On On On...

Page 45: ...Information for device I O connector pinouts MUX Each M Series device has one analog to digital converter ADC The multiplexers MUX route one AI channel at a time to the ADC through the NI PGIA Ground Reference Settings The analog input ground reference settings circuitry selects between differential referenced single ended and non referenced single ended input modes Each AI channel can use a diffe...

Page 46: ...n digitize with the specified accuracy The NI PGIA amplifies or attenuates the AI signal depending on the input range You can individually program the input range of each AI channel on your M Series device The input range affects the resolution of the M Series device for an AI channel Resolution refers to the voltage of one ADC code For example a 16 bit ADC converts analog inputs into one of 65 53...

Page 47: ...olutions supported by each M Series device family Table 4 1 Input Ranges for NI 622x Input Range Nominal Resolution Assuming 5 Over Range 10 V to 10 V 320 μV 5 V to 5 V 160 μV 1 V to 1 V 32 μV 200 mV to 200 mV 6 4 μV Table 4 2 Input Ranges for NI 625x Input Range Nominal Resolution Assuming 5 Over Range 10 V to 10 V 320 μV 5 V to 5 V 160 μV 2 V to 2 V 64 μV 1 V to 1 V 32 μV 500 mV to 500 mV 16 μV ...

Page 48: ...lter is programmable and can be enabled for a lower frequency For example the NI 628x devices have a programmable filter with a cutoff frequency of 40 kHz that can be enabled If the programmable filter is not enabled the cutoff frequency is fixed at 750 kHz If the cutoff is programmable choose the lower cutoff to reduce measurement noise However a filter with a lower cutoff frequency increases the...

Page 49: ...input ground reference settings by routing different signals to the NI PGIA The NI PGIA is a differential amplifier That is the NI PGIA amplifies or attenuates the difference in voltage between its two inputs The NI PGIA drives the ADC with this amplified voltage The amount of amplification the gain is determined by the analog input range as shown in Figure 4 2 Table 4 4 Analog Input Ground Refere...

Page 50: ...und and for differential signals with respect to each other are listed in the specifications document for your device Exceeding the maximum input voltage of AI signals distorts the measurement results Exceeding the maximum input voltage rating also can damage the device and the computer NI is not liable for any damage resulting from such signal connections Table 4 5 Signals Routed to the NI PGIA A...

Page 51: ...op down list Refer to the DAQ Assistant Help for more information about the DAQ Assistant To configure the input mode of your voltage measurement using the NI DAQmx C API set the terminalConfig property Refer to the NI DAQmx C Reference Help for more information Multichannel Scanning Considerations M Series devices can scan multiple channels at high rates and digitize the signals accurately Howeve...

Page 52: ...acitors accumulate charge When the next channel for example channel 1 is selected the accumulated charge leaks backward through channel 1 If the output impedance of the source connected to channel 1 is high enough the resulting reading of channel 1 can be partially affected by the voltage on channel 0 This effect is referred to as ghosting If your source impedance is high you can decrease the scan...

Page 53: ...your channel scanning order so that transitions from large to small input ranges are infrequent In general you do not need this extra settling time when the NI PGIA is switching from a small input range to a larger input range Insert Grounded Channel between Signal Channels Another technique to improve settling time is to connect an input channel to ground Then insert this channel in the scan list...

Page 54: ...te the final result However you may choose to decrease the number of points you average and slow down the scanning rate Suppose you want to sample 10 channels over a period of 20 ms and average the results You could acquire 500 points from each channel at a scan rate of 250 kS s Another method would be to acquire 1 000 points from each channel at a scan rate of 500 kS s Both methods take the same ...

Page 55: ...ions With hardware timed acquisitions a digital hardware signal ai SampleClock controls the rate of the acquisition This signal can be generated internally on your device or provided externally Hardware timed acquisitions have several advantages over software timed acquisitions The time between samples can be much shorter The timing between samples is deterministic Hardware timed acquisitions can ...

Page 56: ...memory The device generates an error in this case With continuous operations if the user program does not read data out of the PC buffer fast enough to keep up with the data transfer the buffer could reach an overflow condition causing an error to be generated Non Buffered In non buffered acquisitions data is read directly from the FIFO on the device Typically hardware timed non buffered operation...

Page 57: ...hapter 4 Analog Input National Instruments Corporation 4 13 M Series User Manual Connecting Analog Input Signals Table 4 6 summarizes the recommended input configuration for both types of signal sources ...

Page 58: ...ed Single Ended NRSE Referenced Single Ended RSE Refer to the Analog Input Ground Reference Settings section for descriptions of the RSE NRSE and DIFF modes and software considerations Refer to the Connecting Ground Referenced Signal Sources section for more information AI AI AI GND Signal Source DAQ Device AI AI AI GND Signal Source DAQ Device AI AI SENSE AI GND Signal Source DAQ Device AI AI SEN...

Page 59: ...nt or return signal The signal leads travel through noisy environments Two analog input channels AI and AI are available for the signal DIFF signal connections reduce noise pickup and increase common mode noise rejection DIFF signal connections also allow input signals to float within the common mode limits of the NI PGIA Refer to the Using Differential Connections for Floating Signal Sources sect...

Page 60: ... V The leads connecting the signal to the device are less than 3 m 10 ft DIFF input connections are recommended for greater signal integrity for any input signal that does not meet the preceding conditions In the single ended modes more electrostatic and magnetic noise couples into the signal connections than in DIFF configurations The coupling is the result of differences in the signal path Magne...

Page 61: ...ive line does not couple onto the negative line because it is connected to ground This noise appears as a DIFF mode signal instead of a common mode signal and thus appears in your data In this case instead of directly connecting the negative line to AI GND connect the negative line to AI GND through a resistor that is about 100 times the equivalent source impedance The resistor puts the signal pat...

Page 62: ...gure 4 6 Differential Connections for Floating Signal Sources with Balanced Bias Resistors Both inputs of the NI PGIA require a DC path to ground in order for the NI PGIA to work If the source is AC coupled capacitively coupled the NI PGIA needs a resistor between the positive input and AI GND If the source has low impedance choose a resistor that is large enough not to significantly load the sour...

Page 63: ...s It is important to connect the negative lead of a floating signals source to AI GND either directly or through a resistor Otherwise the source may float out of the valid input range of the NI PGIA and the DAQ device returns erroneous data Figure 4 8 shows a floating source connected to the DAQ device in NRSE mode Figure 4 8 NRSE Connections for Floating Signal Sources All of the bias resistor co...

Page 64: ...gs in Software section for more information about the DAQ Assistant Using Referenced Single Ended RSE Connections for Floating Signal Sources Figure 4 9 shows how to connect a floating signal source to the M Series device configured for RSE mode Figure 4 9 RSE Connections for Floating Signal Sources Using the DAQ Assistant you can configure the channels for RSE or NRSE input modes Refer to the Con...

Page 65: ...is incorrectly measured this difference can appear as measurement error Follow the connection instructions for grounded signal sources to eliminate this ground potential difference from the measured signal When to Use Differential Connections with Ground Referenced Signal Sources Use DIFF input connections for any channel that meets any of the following conditions The input signal is low level les...

Page 66: ...e result of differences in the signal path Magnetic coupling is proportional to the area between the two signal conductors Electrical coupling is a function of how much the electric field differs between the two conductors With this type of connection the NI PGIA rejects both the common mode noise in the signal and the ground potential difference between the signal source and the device ground Ref...

Page 67: ...Ground Referenced Signal Sources With this type of connection the NI PGIA rejects both the common mode noise in the signal and the ground potential difference between the signal source and the device ground shown as Vcm in the figure AI and AI must both remain within 11 V of AI GND M Series Device Configured in DIFF Mode PGIA Vcm Vs Ground Referenced Signal Source Common Mode Noise and Ground Pote...

Page 68: ...nd reference to AI SENSE 2 AI SENSE or AI SENSE 2 is internally connected to the negative input of the NI PGIA Therefore the ground point of the signal connects to the negative input of the NI PGIA Any potential difference between the device ground and the signal ground appears as a common mode signal at both the positive and negative inputs of the NI PGIA and this difference is rejected by the am...

Page 69: ...Use individually shielded twisted pair wires to connect AI signals to the device With this type of wire the signals attached to the positive and negative input channels are twisted together and then covered with a shield You then connect this shield only at one point to the signal source ground This kind of connection is required for signals traveling through areas with large magnetic fields or hi...

Page 70: ...val Sampling ai ConvertClock controls the Convert Period which is determined by the following equation 1 Convert Period Convert Rate PFI RTSI PXI_STAR Analog Comparison Event 20 MHz Timebase 100 kHz Timebase PXI_CLK10 Programmable Clock Divider Programmable Clock Divider ai SampleClock Timebase ai ConvertClock Timebase PFI RTSI PXI_STAR Analog Comparison Event Ctr n Internal Output SW Pulse PFI RT...

Page 71: ...e value decrements with each pulse on ai SampleClock until the value reaches zero and all desired samples have been acquired Figure 4 14 Posttriggered Data Acquisition Example Pretriggered data acquisition allows you to view data that is acquired before the trigger of interest in addition to data acquired after the trigger Figure 4 15 shows a typical pretriggered DAQ sequence ai StartTrigger can b...

Page 72: ...ignal AI Convert Clock Signal AI Convert Clock Timebase Signal AI Hold Complete Event Signal AI Start Trigger Signal AI Reference Trigger Signal AI Pause Trigger Signal AI Sample Clock Signal Use the AI Sample Clock ai SampleClock signal to initiate a set of measurements Your M Series device samples the AI signals of every channel in the task once for every ai SampleClock A measurement acquisition...

Page 73: ...ck PFI 0 15 RTSI 0 7 PXI_STAR Analog Comparison Event an analog trigger Routing AI Sample Clock Signal to an Output Terminal You can route ai SampleClock out to any PFI 0 15 or RTSI 0 7 terminal This pulse is always active high You can specify the output to have one of two behaviors With the pulse behavior your DAQ device briefly pulses the PFI terminal once for every occurrence of ai SampleClock ...

Page 74: ...ignal is consistent with respect to the timing requirements of ai ConvertClock Failure to do so may result in ai SampleClock pulses that are masked off and acquisitions with erratic sampling intervals Refer to AI Convert Clock Signal for more information about the timing requirements between ai ConvertClock and ai SampleClock Figure 4 16 shows the relationship of ai SampleClock to ai StartTrigger ...

Page 75: ...7 4 and later the driver chooses the fastest conversion rate possible based on the speed of the A D converter and adds 10 µs of padding between each channel to allow for adequate settling time This scheme enables the channels to approximate simultaneous sampling and still allow for adequate settling time If the AI Sample Clock rate is too fast to allow for this 10 µs of padding NI DAQmx chooses th...

Page 76: ...tself in preparation for the next ai SampleClock pulse Using an External Source Use one of the following external signals as the source of ai ConvertClock PFI 0 15 RTSI 0 7 PXI_STAR Analog Comparison Event an analog trigger Routing AI Convert Clock Signal to an Output Terminal You can route ai ConvertClock as an active low signal out to any PFI 0 15 or RTSI 0 7 terminal All PFI terminals are confi...

Page 77: ...the device recognizes an ai SampleClock pulse it ignores subsequent ai SampleClock pulses until it receives the correct number of ai ConvertClock pulses Similarly the device ignores all ai ConvertClock pulses until it recognizes an ai SampleClock pulse Once the device receives the correct number of ai ConvertClock pulses it ignores subsequent ai ConvertClock pulses until it receives another ai Sam...

Page 78: ...nvertClock Sample 1 Sample 2 Sample 3 Channel Measured 1 2 3 0 1 2 3 0 1 2 3 0 Sample Clock Pulses are Gated Off Convert Clock Too Fast for Sample Clock Convert Clock Pulses are Gated Off ai SampleClock ai ConvertClock Sample 1 Sample 2 Sample 3 1 2 3 0 1 2 3 0 1 2 3 0 Channel Measured Improperly Matched Sample Clock and Convert Clock Leads to Aperiodic Sampling ai SampleClock ai ConvertClock Samp...

Page 79: ...tClock Simultaneously AI Convert Clock Timebase Signal The AI Convert Clock Timebase ai ConvertClockTimebase signal is divided down to provide on of the possible sources for ai ConvertClock Use one of the following signals as the source of ai ConvertClockTimebase ai SampleClockTimebase 20 MHz Timebase ai ConvertClockTimebase is not available as an output on the I O connector Properly Matched Sampl...

Page 80: ...in a measurement with a software command Once the acquisition begins configure the acquisition to stop When a certain number of points are sampled in finite mode After a hardware reference trigger in finite mode With a software command in continuous mode An acquisition that uses a start trigger but not a reference trigger is sometimes referred to as a posttriggered acquisition Using a Digital Sour...

Page 81: ...acquisition To use a reference trigger specify a buffer of finite size and a number of pretrigger samples samples that occur before the reference trigger The number of posttrigger samples samples that occur after the reference trigger desired is the buffer size minus the number of pretrigger samples Once the acquisition begins the DAQ device writes samples to the buffer After the DAQ device captur...

Page 82: ...ne of several internal signals on your DAQ device Refer to Device Routing in MAX in the NI DAQmx Help or the LabVIEW Help in version 8 0 or later for more information You also can specify whether the measurement acquisition stops on the rising edge or falling edge of ai ReferenceTrigger Using an Analog Source When you use an analog trigger source the acquisition stops on the first rising edge of t...

Page 83: ...e and a polarity The source can be any of the following signals PFI 0 15 RTSI 0 7 PXI_STAR The source also can be one of several other internal signals on your DAQ device Refer to Device Routing in MAX in the NI DAQmx Help or the LabVIEW Help in version 8 0 or later for more information Using an Analog Source When you use an analog trigger source the internal sample clock pauses when the Analog Co...

Page 84: ...t analog input Finite analog input Continuous analog input You can perform these applications through DMA interrupt or programmed I O data transfer mechanisms Some of the applications also use start reference and pause triggers Note For more information about programming analog input applications and triggers in software refer to the NI DAQmx Help or the LabVIEW Help in version 8 0 or later ...

Page 85: ...e analog output circuitry of M Series devices Figure 5 1 M Series Analog Output Circuitry The main blocks featured in the M Series analog output circuitry are as follows DACs Digital to analog converters DACs convert digital codes to analog voltages AO FIFO The AO FIFO enables analog output waveform generation It is a first in first out FIFO memory buffer between the computer and the DACs It allow...

Page 86: ...ween AO Offset AO Reference and AO Offset AO Reference The possible settings for AO reference depend on the device model For models not described below refer to the specifications for your device NI 622x Devices On NI 622x devices the AO offset is always 0 V AO GND The AO reference is always 10 V So for NI 622x devices the AO Range 10 V NI 625x Devices On NI 625x devices the AO offset is always 0 ...

Page 87: ... connections are required You cannot route an AO channel to be its own offset On NI 628x devices the AO reference of each analog output can be individually set to one of the following 10 V 5 V APFI 0 1 AO 0 3 You can connect an external signal to APFI 0 1 to provide the AO reference You can route the output of one of the AO 0 3 signals to be the AO reference for a different AO 0 3 signal For examp...

Page 88: ...are Timed Generations With a software timed generation software controls the rate at which data is generated Software sends a separate command to the hardware to initiate each DAC conversion In NI DAQmx software timed generations are referred to as on demand timing Software timed generations are also referred to as immediate or static operations They are typically used for writing a single value o...

Page 89: ...cified number of samples has been written out the generation stops Continuous generation refers to the generation of an unspecified number of samples Instead of generating a set number of data samples and stopping a continuous generation continues until you stop the operation There are several different methods of continuous generation that control what data is written These methods are regenerati...

Page 90: ...ome do not support analog triggering To find your device s triggering options refer to the specifications document for your device Refer to the AO Start Trigger Signal and AO Pause Trigger Signal sections for more information about these triggering actions Connecting Analog Output Signals AO 0 3 are the voltage output signals for AO channels 0 1 2 and 3 AO GND is the ground reference for AO 0 3 Fi...

Page 91: ...ple Clock Timebase Signal AO Start Trigger Signal Use the AO Start Trigger ao StartTrigger signal to initiate a waveform generation If you do not use triggers you can begin a generation with a software command Using a Digital Source To use ao StartTrigger specify a source and an edge The source can be one of the following signals A pulse initiated by host software PFI 0 15 RTSI 0 7 PFI RTSI PXI_ST...

Page 92: ... section of Chapter 11 Triggering for more information Routing AO Start Trigger Signal to an Output Terminal You can route ao StartTrigger out to any PFI 0 15 or RTSI 0 7 terminal The output is an active high pulse PFI terminals are configured as inputs by default AO Pause Trigger Signal Use the AO Pause trigger signal ao PauseTrigger to mask off samples in a DAQ sequence That is when ao PauseTrig...

Page 93: ...e 5 5 Figure 5 5 ao PauseTrigger with Other Signal Source Using a Digital Source To use ao PauseTrigger specify a source and a polarity The source can be one of the following signals PFI 0 15 RTSI 0 7 PXI_STAR The source also can be one of several other internal signals on your DAQ device Refer to Device Routing in MAX in the NI DAQmx Help or the LabVIEW Help in version 8 0 or later for more infor...

Page 94: ...l of the DACs You can specify an internal or external source for ao SampleClock You also can specify whether the DAC update begins on the rising edge or falling edge of ao SampleClock Using an Internal Source One of the following internal signals can drive ao SampleClock AO Sample Clock Timebase divided down Counter n Internal Output A programmable internal counter divides down the AO Sample Clock...

Page 95: ... this delay is two ticks of ao SampleClockTimebase Figure 5 6 shows the relationship of ao SampleClock to ao StartTrigger Figure 5 6 ao SampleClock and ao StartTrigger AO Sample Clock Timebase Signal The AO Sample Clock Timebase ao SampleClockTimebase signal is divided down to provide a source for ao SampleClock You can route any of the following signals to be the AO Sample Clock Timebase ao Sampl...

Page 96: ...g Started with AO Applications in Software You can use an M Series device in the following analog output applications Single point on demand generation Finite generation Continuous generation Waveform generation You can perform these generations through programmed I O interrupt or DMA data transfer mechanisms Some of the applications also use start triggers and pause triggers Note For more informa...

Page 97: ...ries devices support the following DIO features on Port 0 Up to 32 lines of DIO Direction and function of each terminal individually controllable Static digital input and output High speed digital waveform generation High speed digital waveform acquisition DI change detection trigger interrupt Figure 6 1 shows the circuitry of one DIO line Each DIO line is similar The following sections provide in...

Page 98: ... configured as a digital input DI or digital output DO All samples of static DI lines and updates of DO lines are software timed P0 6 and P0 7 on 68 pin M Series devices also can control the up down input of general purpose counters 0 and 1 respectively However it is recommended that you use PFI signals to control the up down input of the counters The up down control signals Counter 0 Up_Down and ...

Page 99: ... clock pulses which in turn generates DI Sample clock pulses as shown in Figure 6 2 Figure 6 2 Digital Waveform Triggering Similarly if you are using AO Sample Clock as the source of DI Sample Clock then AO Start Trigger initiates both AO and DI operations If you are using a Counter output as the source of DI Sample Clock the counter s start trigger enables the counter which drives DI Sample Clock...

Page 100: ...our DI Sample Clock To sample a digital signal independent of an AI AO or DO operation you can configure a counter to generate the desired DI Sample Clock or use an external signal as the source of the clock If the DAQ device receives a di SampleClock when the FIFO is full it reports an overflow error to the host software Using an Internal Source To use di SampleClock with an internal source speci...

Page 101: ...mit mode after all the samples in the FIFO have been clocked out the FIFO begins outputting all of the samples again in the same order For example if the FIFO contains five samples the pattern generated consists of sample 1 2 3 4 5 1 2 3 4 5 1 and so on DO Sample Clock Signal Use the DO Sample Clock do SampleClock signal to update the DO terminals with the next sample from the DO waveform generati...

Page 102: ...n 8 0 or later for more information Using an External Source You can route any of the following signals as do SampleClock PFI 0 15 RTSI 0 7 PXI_STAR Analog Comparison Event an analog trigger You can generate samples on the rising or falling edge of do SampleClock You must ensure that the time between two active edges of do SampleClock is not too short If the time is too short the DO waveform gener...

Page 103: ... device as you would treat any static sensitive device Always properly ground yourself and the equipment when handling the DAQ device or connecting to it Programmable Power Up States At system startup and reset the hardware sets all PFI and DIO lines to high impedance inputs by default The DAQ device does not drive the signal high or low Each line has a weak pull down resistor connected to it as d...

Page 104: ...d by NI DAQmx 8 0 and later You can enable the DIO change detection circuitry to detect rising edges falling edges or either edge individually on each DIO line The DAQ devices synchronize each DI signal to 80MHzTimebase and then sends the signal to the change detectors The circuitry ORs the output of all enabled change detectors from every DI signal The result of this OR is the Change Detection Ev...

Page 105: ...er on a single digital signal refer to the Triggering with a Digital Source section of Chapter 11 Triggering By routing the Change Detection Event signal to a counter you also can capture the relative time between samples You also can use the Change Detection Event signal to trigger DO or counter generations Connecting Digital I O Signals The DIO signals P0 0 31 P1 0 7 and P2 0 7 are referenced to...

Page 106: ...h signal connections Getting Started with DIO Applications in Software You can use the M Series device in the following digital I O applications Static digital input Static digital output Digital waveform generation Digital waveform acquisition DI change detection Note For more information about programming digital I O applications and triggers in software refer to the NI DAQmx Help or the LabVIEW...

Page 107: ...ries Counters Counter 0 Counter 0 Source Counter 0 Timebase Counter 0 Aux Counter 0 HW Arm Counter 0 A Counter 0 B Counter 0 Up_Down Counter 0 Z Counter 0 Gate Counter 0 Internal Output Counter 0 TC Input Selection Muxes Frequency Generator Frequency Output Timebase Freq Out Input Selection Muxes Counter 1 Counter 1 Source Counter 1 Timebase Counter 1 Aux Counter 1 HW Arm Counter 1 A Counter 1 B C...

Page 108: ...oint on demand edge counting the counter counts the number of edges on the Source input after the counter is armed On demand refers to the fact that software can read the counter contents at any time without disturbing the counting process Figure 7 2 shows an example of single point edge counting Figure 7 2 Single Point On Demand Edge Counting You also can use a pause trigger to pause or gate the ...

Page 109: ...unt values returned are the cumulative counts since the counter armed event That is the sample clock does not reset the counter You can route the counter sample clock to the Gate input of the counter You can configure the counter to sample on the rising or falling edge of the sample clock Figure 7 4 shows an example of buffered edge counting Notice that counting begins when the counter is armed wh...

Page 110: ...known period to the Source input of the counter The counter counts the number of rising or falling edges on the Source signal while the pulse on the Gate signal is active You can calculate the pulse width by multiplying the period of the Source signal by the number of edges returned by the counter A pulse width measurement will be accurate even if the counter is armed while a pulse train is in pro...

Page 111: ...while the Gate input remains active On each trailing edge of the Gate signal the counter stores the count in a hardware save register A DMA controller transfers the stored values to host memory Figure 7 6 shows an example of a buffered pulse width measurement Figure 7 6 Buffered Pulse Width Measurement Note that if you are using an external signal as the Source at least one Source pulse should occ...

Page 112: ...he counter The counter counts the number of rising or falling edges occurring on the Source input between the two active edges of the Gate signal You can calculate the period of the Gate input by multiplying the period of the Source signal by the number of edges returned by the counter Single Period Measurement With single period measurement the counter counts the number of rising or falling edges...

Page 113: ...ate input So the first value stored in the hardware save register does not reflect a full period of the Gate input In most applications this first point should be discarded Figure 7 8 shows an example of a buffered period measurement Figure 7 8 Buffered Period Measurement Note that if you are using an external signal as the Source at least one Source pulse should occur between each active edge of ...

Page 114: ...es returned by the counter Single Semi Period Measurement Single semi period measurement is equivalent to single pulse width measurement Buffered Semi Period Measurement In buffered semi period measurement on each edge of the Gate signal the counter stores the count in a hardware save register A DMA controller transfers the stored values to host memory The counter begins counting when it is armed ...

Page 115: ...l different ways You can choose one of the following methods depending on your application Method 1 Measure Low Frequency with One Counter In this method you measure one period of your signal using a known timebase This method is good for low frequency signals You can route the signal to measure F1 to the Gate of a counter You can route a known timebase Ft to the Source of the counter The known ti...

Page 116: ...n be 80MHzTimebase For signals that might be slower than 0 02 Hz use a slower known timebase You can configure the counter to make K 1 buffered period measurements Recall that the first period measurement in the buffer should be discarded Average the remaining K period measurements to determine the average period of F1 The frequency of F1 is the inverse of the average period Figure 7 11 illustrate...

Page 117: ... You also can generate the pulse externally and connect it to a PFI or RTSI terminal You only need to use one counter if you generate the pulse externally Route the signal to measure F1 to the Source of the counter Configure the counter for a single pulse width measurement Suppose you measure the width of pulse T to be N periods of F1 Then the frequency of F1 is N T Figure 7 12 illustrates this me...

Page 118: ... Figure 7 13 Assume this signal to measure has frequency F1 Configure Counter 0 to generate a single pulse that is the width of N periods of the source input signal Figure 7 13 Method 3 Then route the Counter 0 Internal Output signal to the Gate input of Counter 1 You can route a signal of known frequency F2 to the Counter 1 Source input F2 can be 80MHzTimebase For signals that might be slower tha...

Page 119: ...return 1600 1 cycles depending on the phase of the signal with respect to the timebase As your frequency becomes larger this error of 1 cycle becomes more significant Table 7 1 illustrates this point Method 1b measuring K periods of F1 improves the accuracy of the measurement A disadvantage of Method 1b is that you have to take K 1 measurements These measurements take more time and consume some of...

Page 120: ...rements with quadrature encoders or two pulse encoders You can measure angular position with X1 X2 and X4 angular encoders Linear position can be measured with two pulse encoders You can choose to do either a single point on demand position measurement or a buffered sample clock position measurement You must arm a counter to begin position measurements Measurements Using Quadrature Encoders The co...

Page 121: ...en channel B leads channel A the decrement occurs on the falling edge of channel A Figure 7 14 X1 Encoding X2 Encoding The same behavior holds for X2 encoding except the counter increments or decrements on each edge of channel A depending on which channel leads the other Each cycle results in two increments or decrements as shown in Figure 7 15 Figure 7 15 X2 Encoding X4 Encoding Similarly the cou...

Page 122: ... during at least a portion of the phase you specify for reload For instance in Figure 7 17 channel Z is never high when channel A is high and channel B is low Thus the reload must occur in some other phase In Figure 7 17 the reload phase is when both channel A and channel B are low The reload occurs when this phase is true and channel Z is high Incrementing and decrementing takes priority over rel...

Page 123: ...unting and an active edge on the Gate input stops the counting You must arm a counter to begin a two edge separation measurement After the counter has been armed and an active edge occurs on the Aux input the counter counts the number of rising or falling edges on the Source The counter ignores additional edges on the Aux input The counter stops counting upon receiving an active edge on the Gate i...

Page 124: ...measurement Figure 7 19 Single Two Signal Edge Separation Measurement Buffered Two Signal Edge Separation Measurement Buffered and single two signal edge separation measurements are similar but buffered measurement measures multiple intervals The counter counts the number of rising or falling edges on the Source input occurring between an active edge of the Gate signal and an active edge of the Au...

Page 125: ...ration Single Pulse Generation The counter can output a single pulse The pulse appears on the Counter n Internal Output signal of the counter You can specify a delay from when the counter is armed to the beginning of the pulse The delay is measured in terms of a number of active edges of the Source input You can specify a pulse width The pulse width is also measured in terms of a number of active ...

Page 126: ...l of the counter You can route the Start Trigger signal to the Gate input of the counter You can specify a delay from the Start Trigger to the beginning of the pulse You also can specify the pulse width The delay and pulse width are measured in terms of a number of active edges of the Source input After the Start Trigger signal pulses once the counter ignores the Gate input Figure 7 22 shows a gen...

Page 127: ... another Start Trigger signal to begin another pulse generation Figure 7 23 shows a generation of two pulses with a pulse delay of five and a pulse width of three using the rising edge of Source Figure 7 23 Retriggerable Single Pulse Generation For information about connecting counter signals refer to the Default Counter Timer Pinouts section Pulse Train Generation Continuous Pulse Train Generatio...

Page 128: ...Continuous Pulse Train Generation Continuous pulse train generation is sometimes called frequency division If the high and low pulse widths of the output signal are M and N periods then the frequency of the Counter n Internal Output signal is equal to the frequency of the Source input divided by M N For information about connecting counter signals refer to the Default Counter Timer Pinouts section...

Page 129: ...requency Output is low for D 1 2 cycles and high for D 1 2 cycles of the Frequency Output Timebase Figure 7 26 shows the output waveform of the frequency generator when the divider is set to 5 Figure 7 26 Frequency Generator Output Waveform Frequency Output can be routed out to any PFI 0 15 or RTSI 0 7 terminal All PFI terminals are set to high impedance at startup The FREQ OUT signal also can be ...

Page 130: ...ement to be 10 the delay between the active Gate edge and the pulse on the output will increase by 10 every time a new pulse is generated Suppose you program your counter to generate pulses with a delay of 100 and pulse width of 200 each time it receives a trigger Furthermore suppose you specify the delay increment to be 10 On the first trigger your pulse delay will be 100 on the second it will be...

Page 131: ...ices feature the following counter timing signals Counter n Source Counter n Gate Counter n Aux Counter n A Counter n B Counter n Z Counter n Up_Down Counter n HW Arm Counter n Internal Output Counter n TC Frequency Output In this section n refers to either Counter 0 or 1 For example Counter n Source refers to two signals Counter 0 Source the source input to Counter 0 and Counter 1 Source the sour...

Page 132: ...Source input 80 MHz Timebase 20 MHz Timebase 100 kHz Timebase RTSI 0 7 PFI 0 15 PXI_CLK10 PXI_STAR Analog Comparison Event In addition Counter 1 TC or Counter 1 Gate can be routed to Counter 0 Source Counter 0 TC or Counter 0 Gate can be routed to Counter 1 Source Some of these options may not be available in some driver software Table 7 3 Counter Applications and Counter n Source Application Purp...

Page 133: ... input selectors for the Counter n Gate signal Any of the following signals can be routed to the Counter n Gate input RTSI 0 7 PFI 0 15 ai ReferenceTrigger ai StartTrigger ai SampleClock ai ConvertClock ao SampleClock di SampleClock do SampleClock PXI_STAR Change Detection Event Analog Comparison Event In addition Counter 1 Internal Output or Counter 1 Source can be routed to Counter 0 Gate Counte...

Page 134: ...nter 0 Aux Counter 0 Internal Output Counter 0 Gate Counter 0 Source or Counter 1 Gate can be routed to Counter 1 Aux Some of these options may not be available in some driver software Counter n A Counter n B and Counter n Z Signals Counter n B can control the direction of counting in edge counting applications Use the A B and Z inputs to each counter when measuring quadrature encoders or measurin...

Page 135: ... arm a counter or configure counters to be armed on a hardware signal Software calls this hardware signal the Arm Start Trigger Internally software routes the Arm Start Trigger to the Counter n HW Arm input of the counter Routing Signals to Counter n HW Arm Input Any of the following signals can be routed to the Counter n HW Arm input RTSI 0 7 PFI 0 15 ai ReferenceTrigger ai StartTrigger PXI_STAR ...

Page 136: ...quency output generator Routing Frequency Output to a Terminal You can route Frequency Output to any PFI 0 15 terminal All PFIs are set to high impedance at startup The FREQ OUT signal also can be routed to DO Sample Clock and DI Sample Clock Default Counter Timer Pinouts By default NI DAQmx routes the counter timer inputs and outputs to the PFI pins shown in Table 7 4 To find the default NI DAQmx...

Page 137: ...ons arm start start and pause Arm Start Trigger To begin any counter input or output function you must first enable or arm the counter Software can arm a counter or configure counters to be armed on a hardware signal Software calls this hardware signal the Arm Start Trigger Internally software routes the Arm Start Trigger to the Counter n HW Arm input of the counter For counter output operations y...

Page 138: ...retriggerable attribute When you use this attribute subsequent start triggers cause the generation to restart When using a start trigger the start trigger source is routed to the Counter n Gate signal input of the counter Counter input operations can use the arm start trigger to have start trigger like behavior Pause Trigger You can use pause triggers in edge counting and continuous pulse generati...

Page 139: ...your device samples the input on each rising edge of a filter clock M Series devices use an onboard oscillator to generate the filter clock with a 40 MHz frequency Note NI DAQmx only supports filters on counter inputs The following is an example of low to high transitions of the input signal High to low transitions work similarly Assume that an input terminal has been low for a long time The input...

Page 140: ...gital filters and counters To access this KnowledgeBase go to ni com info and enter the info code rddfms Prescaling Prescaling allows the counter to count a signal that is faster than the maximum timebase of the counter M Series devices offer 8X and 2X prescaling on each counter prescaling can be disabled Each prescaler consists of a small simple counter that counts to eight or two and rolls over ...

Page 141: ... counting mode ensures that a counter returns correct data in applications that use a slow or non periodic external source Duplicate count prevention applies only to buffered counter applications such as measuring frequency or period In such buffered applications the counter should store the number of times an external Source pulses between rising edges on the Gate signal Example Application That ...

Page 142: ... Application That Works Incorrectly Duplicate Counting In Figure 7 31 after the first rising edge of Gate no Source pulses occur so the counter does not write the correct data to the buffer Figure 7 31 Duplicate Count Example Example Application That Prevents Duplicate Count With duplicate count prevention enabled the counter synchronizes both the Source and Gate signals to the 80 MHz Timebase By ...

Page 143: ...t prevention should only be used if the frequency of the Source signal is 20 MHz or less When To Use Duplicate Count Prevention You should use duplicate count prevention if the following conditions are true You are making a counter measurement You are using an external signal such as PFI x as the counter Source The frequency of the external source is 20 MHz or less You can have the counter value a...

Page 144: ...nter M Series devices use one of three synchronization methods 80 MHz source mode Other internal source mode External source mode In DAQmx the device uses 80 MHz source mode if you perform the following Perform a position measurement Select duplicate count prevention Otherwise the mode depends on the signal that drives Counter n Source Table 7 6 describes the conditions for each mode Table 7 6 Syn...

Page 145: ...nals on the falling edge of the source and counts on the following rising edge of the source as shown in Figure 7 34 Figure 7 34 Other Internal Source Mode External Source Mode In external source mode the device generates a delayed Source signal by delaying the Source signal by several nanoseconds The device synchronizes signals on the rising edge of the delayed Source signal and counts on the fol...

Page 146: ...ic digital input A static digital output A timing input signal for AI AO DI DO or counter timer functions A timing output signal from AI AO DI DO or counter timer functions Each PFI input also has a programmable debouncing filter Figure 8 1 shows the circuitry of one PFI line Each PFI line is similar Figure 8 1 M Series PFI Circuitry Timing Signals Direction Control Static DI I O Protection Weak P...

Page 147: ...cations of your device Using PFI Terminals as Timing Input Signals Use PFI terminals to route external timing signals to many different M Series functions Each PFI terminal can be routed to any of the following signals AI Convert Clock AI Sample Clock AI Start Trigger AI Reference Trigger AI Pause Trigger AI Sample Clock Timebase AO Start Trigger AO Sample Clock AO Sample Clock Timebase AO Pause T...

Page 148: ... Output Frequency Output PXI_STAR RTSI 0 7 Analog Comparison Event Change Detection Event DI Sample Clock DO Sample Clock Note Signals with a are inverted before being driven to a terminal that is these signals are active low Using PFI Terminals as Static Digital I Os Each PFI can be individually configured as a static digital input or a static digital output When a terminal is used as a static di...

Page 149: ...n enable a programmable debouncing filter on each PFI RTSI or PXI_STAR signal When the filters are enabled your device samples the input on each rising edge of a filter clock M Series devices use an onboard oscillator to generate the filter clock with a 40 MHz frequency Note NI DAQmx only supports filters on counter inputs The following is an example of low to high transitions of the input signal ...

Page 150: ...For the 125 ns and 6 425 µs filter settings the jitter is up to 25 ns On the 2 56 ms setting the jitter is up to 10 025 µs When a PFI input is routed directly to RTSI or a RTSI input is routed directly to PFI the M Series device does not use the filtered version of the input signal Refer to the KnowledgeBase document Digital Filtering with M Series for more information about digital filters and co...

Page 151: ...uld treat any static sensitive device Always properly ground yourself and the equipment when handling the DAQ device or connecting to it Programmable Power Up States At system startup and reset the hardware sets all PFI and DIO lines to high impedance inputs by default The DAQ device does not drive the signal high or low Each line has a weak pull down resistor connected to it as described in the s...

Page 152: ...cquisition generation sub systems use these signals to manage acquisitions and generations These signals can come from the following sources Your M Series device Other devices in your system through RTSI User input through the PFI terminals User input through the PXI_STAR terminal Routes and generates the main clock signals for the M Series device Clock Routing Figure 9 1 shows the clock routing c...

Page 153: ... Timebase 100 kHz Timebase The 100 kHz Timebase can be used to generate many of the AI and AO timing signals The 100 kHz Timebase also can be used as the Source input to the 32 bit general purpose counter timers The 100 kHz Timebase is generated by dividing down the 20 MHz Timebase by 200 External Reference Clock The external reference clock can be used as a source for the internal timebases 80 MH...

Page 154: ...nerate the timebase The initiator device routes its 10 MHz reference clock to one of the RTSI 0 7 signals All devices including the initiator device receive the 10 MHz reference clock from RTSI This signal becomes the external reference clock A PLL on each device generates the internal timebases synchronous to the external reference clock On PXI systems you also can synchronize devices to PXI_CLK1...

Page 155: ...t RTSI Note RTSI is not supported on USB devices In a PCI system the RTSI bus consists of the RTSI bus interface and a ribbon cable The bus can route timing and trigger signals between several functions on as many as five DAQ vision motion or CAN devices in the computer In a PXI system the RTSI bus consists of the RTSI bus interface and the PXI trigger signals on the PXI backplane This bus can rou...

Page 156: ...nual Figure 9 2 M Series RTSI Pinout Table 9 1 RTSI Signals RTSI Bus Signal Terminal RTSI 7 34 RTSI 6 32 RTSI 5 30 RTSI 4 28 RTSI 3 26 RTSI 2 24 RTSI 1 22 RTSI 0 20 Not Connected Do not connect signals to these terminals 1 18 D GND 19 21 23 25 27 29 31 33 Terminal 2 Terminal 34 Terminal 33 Terminal 1 ...

Page 157: ...unter n Source Gate Z Internal Output Change Detection Event Analog Comparison Event FREQ OUT PFI 0 5 Note Signals with a are inverted before being driven on the RTSI terminals Using RTSI Terminals as Timing Input Signals You can use RTSI terminals to route external timing signals to many different M Series functions Each RTSI terminal can be routed to any of the following signals AI Convert Clock...

Page 158: ... example of low to high transitions of the input signal High to low transitions work similarly Assume that an input terminal has been low for a long time The input terminal then changes from low to high but glitches several times When the filter clock has sampled the signal high on N consecutive edges the low to high transition is propagated to the rest of the circuit The value of N depends on the...

Page 159: ... signals are only available on PXI PXI Express devices PXI_CLK10 PXI_CLK10 is a common low skew 10 MHz reference clock for synchronization of multiple modules in a PXI measurement or control system The PXI backplane is responsible for generating PXI_CLK10 independently to each peripheral slot in a PXI chassis PXI Triggers A PXI chassis provides eight bused trigger lines to each module in a system ...

Page 160: ...Star Trigger controller PXI_STAR can be used as an external source for many AI AO and counter signals An M Series device is not a Star Trigger controller An M Series device may be used in the first peripheral slot of a PXI system but the system will not be able to use the Star Trigger feature PXI_STAR Filters You can enable a programmable debouncing filter on each PFI RTSI or PXI_STAR signal When ...

Page 161: ... or a RTSI input is routed directly to PFI the M Series device does not use the filtered version of the input signal Refer to the KnowledgeBase document Digital Filtering with M Series for more information about digital filters and counters To access this KnowledgeBase go to ni com info and enter the info code rddfms Table 9 3 Filters Filter Setting N Filter Clocks Needed to Pass Signal Pulse Widt...

Page 162: ...MITE technology to implement a high performance PCI interface M Series USB devices incorporate USB STC2 technology to implement a Hi Speed USB interface DMA Controllers and USB Signal Stream NI M Series PCI PCIe PXI PXIe devices have six fully independent DMA controllers for high performance transfers of data blocks One DMA controller is available for each measurement and acquisition block Analog ...

Page 163: ...rs of data blocks These channels are assigned to the first four measurement acquisition circuits that request one PXI Considerations Note PXI clock and trigger signals are only available on PXI devices PXI Clock and Trigger Signals Refer to the PXI_CLK10 PXI Triggers PXI_STAR Trigger and PXI_STAR Filters sections of Chapter 9 Digital Routing and Clock Generation for more information about PXI cloc...

Page 164: ...CI chassis you cannot use PXI specific functions but you can still use the basic plug in device functions For example the RTSI bus on a PXI M Series device is available in a PXI chassis but not in a CompactPCI chassis The CompactPCI specification permits vendors to develop sub buses that coexist with the basic PCI interface on the CompactPCI bus Compatible operation is not guaranteed between Compa...

Page 165: ...e rate at which the CPU can service the interrupt requests If you are using interrupts to transfer data at a rate faster than the rate the CPU can service the interrupts your systems may start to freeze Programmed I O Programmed I O is a data transfer mechanism where the user s program is responsible for transferring data Each read or write call in the program initiates the transfer of data Progra...

Page 166: ...A However NI DAQmx allows you to disable DMA and use interrupts To change your data transfer mechanism between DMA and interrupts in NI DAQmx use the Data Transfer Mechanism property node USB Devices USB M Series devices have four dedicated USB Signal Stream channels These channels are assigned to the first four measurement acquisition circuits that request one If a USB Signal Stream is not availa...

Page 167: ... 4 Analog Input The Analog Output Triggering section of Chapter 5 Analog Output The Counter Triggering section of Chapter 7 Counters Note Not all M Series devices support analog triggering For more information about triggering compatibility refer to the specifications document for your device Triggering with a Digital Source Your DAQ device can generate a trigger on a digital signal You must speci...

Page 168: ... specify a source and an analog trigger type The source can be either an APFI 0 1 terminal or an analog input channel APFI 0 1 Terminals When you use either APFI 0 1 terminal as an analog trigger you should drive the terminal with a low impedance signal source less than 1 kΩ source impedance If APFI 0 1 are left unconnected they are susceptible to crosstalk from adjacent terminals which can cause ...

Page 169: ...r places some restrictions on using AI channels as trigger sources When you use an analog start trigger the trigger channel must be the first channel in the channel list When you use an analog reference or pause trigger and the analog channel is the source of the trigger there can be only one channel in the channel list Analog Trigger Actions The output of the analog trigger detection circuit is t...

Page 170: ...g Triggering Mode In above level analog triggering mode shown in Figure 11 4 the trigger is generated when the signal value is greater than Level Figure 11 4 Above Level Analog Triggering Mode Analog Edge Triggering with Hysteresis Hysteresis adds a programmable voltage region above or below the trigger level that an input signal must pass through before the DAQ device recognizes a trigger conditi...

Page 171: ... Figure 11 5 Analog Edge Triggering with Hysteresis Rising Slope Example Analog Edge Trigger with Hysteresis Falling Slope When using hysteresis with a falling slope you specify a trigger level and amount of hysteresis The low threshold is the trigger level the high threshold is the trigger level plus the hysteresis For the trigger to assert the signal must first be above the high threshold then g...

Page 172: ...wo voltage levels Specify the levels by setting the window Top value and the window Bottom value Figure 11 7 demonstrates a trigger that asserts when the signal enters the window Figure 11 7 Analog Window Triggering Mode Entering Window Analog Comparison Event Hysteresis High threshold Level Hysteresis Low threshold Level First signal must go above high threshold Then signal must go below low thre...

Page 173: ...using an AI channel the NI PGIA amplifies the AI channel signal before driving the analog trigger circuitry If you configure the AI channel to have a small input range you can trigger on very small voltage changes in the input signal Software calibrate the analog trigger circuitry The propagation delay from when a valid trigger condition is met to when the analog trigger circuitry emits the Analog...

Page 174: ...tains device pinouts specifications cable and accessory choices and other information for the following M Series devices NI 6220 NI 6221 NI 6224 NI 6225 NI 6229 NI 6250 NI 6251 NI 6254 NI 6255 NI 6259 NI 6280 NI 6281 NI 6284 NI 6289 To obtain documentation for devices not listed here refer to ni com manuals ...

Page 175: ...tion of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more information ...

Page 176: ...D AI 5 AI 12 AI SENSE AI 11 AI GND AI 2 AI 9 AI GND AI 0 PFI 14 P2 6 PFI 9 P2 1 D GND PFI 5 P1 5 D GND 5 V D GND PFI 12 P2 4 PFI 6 P1 6 PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 NC NC NC AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 68 34 67 33 66 32 65 31 64 30 63 29 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15...

Page 177: ...y and Cabling Options This section describes some cable and accessory options for M Series devices with one 68 pin connector such as the PCI PXI 6220 Refer to ni com for other accessory options including new devices Table A 1 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CTR 0 A 37 PFI 8...

Page 178: ...ng to your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Refer to the SCC Advisor available by going to ni com info and entering the info code rdscav for more information BNC Accessories You can use the SHC68 68 EPM shielded cable to connect your DAQ device to BNC accessories such as the following BNC 21...

Page 179: ...n devices Since PXI devices use PXI backplane signals for timing and synchronization no cables are required Cables In most applications you can use the following cables SHC68 68 EPM1 High performance cable designed specifically for M Series devices It has individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shielded twisted pa...

Page 180: ...6221 68 Pin Pinout Figure A 2 shows the pinout of the PCI PXI 6221 68 pin device For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Compariso...

Page 181: ...AI 12 AI SENSE AI 11 AI GND AI 2 AI 9 AI GND AI 0 PFI 14 P2 6 PFI 9 P2 1 D GND PFI 5 P1 5 D GND 5 V D GND PFI 12 P2 4 PFI 6 P1 6 PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 NC AO 1 AO 0 AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 68 34 67 33 66 32 65 31 64 30 63 29 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48...

Page 182: ...6221 68 Pin Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with one 68 pin connector such as the PCI PXI 6221 68 pin Refer to ni com for other accessory options including new devices Table A 2 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OU...

Page 183: ...Q system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Refer to the SCC Advisor available by going to ni com info and entering the info code rdscav for more information BNC Accessories You can use the SHC68 68 EPM shielded cable to connect your DAQ device to BNC accessories such as the following BNC 2110 Provides B...

Page 184: ...sion and motion devices Since PXI devices use PXI backplane signals for timing and synchronization no cables are required Cables In most applications you can use the following cables SHC68 68 EPM1 High performance cable designed specifically for M Series devices It has individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shiel...

Page 185: ...ons section of Chapter 3 Connector and LED Information Figure A 3 PCI 6221 37 Pin Pinout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 AI 0 AI 9 AI GND AI 10 AI 3 AI 4 AI 13 AI SENSE AI 14 AI 15 AO GND AO 0 PFI 0 P1 0 D GND PFI 3 P1 3 D GND PFI 6 P1 6 D GND P0 1 AI 8 AI 1 AI 2 AI 11 AI GND AI 12 AI 5 AI 6 AI 7 NC AO 1 AO GND PFI 1 P1 1 PFI 2 ...

Page 186: ...1 37 pin device PCI 6221 37 Pin Accessory and Cabling Options This section describes some cable and accessory options for the PCI 6221 37 pin device Refer to ni com for other accessory options including new devices Table A 3 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 13 PFI 0 CTR 0 GATE 32 PFI 1 CTR 0 AUX 33 PFI 2 CTR 0 OUT 17 PFI 6 CTR 0 A 13 PFI 0 ...

Page 187: ...Low profile connector block with 37 screw terminals RTSI Cables Use RTSI bus cables to connect timing and synchronization signals among PCI devices such as M Series E Series CAN and other measurement vision and motion devices Cables In most applications you can use the following cables SH37F 37M 1 37 pin female to male shielded I O cable 1 m SH37F 37M 2 37 pin female to male shielded I O cable 2 m...

Page 188: ...FI 8 CTR 0 GATE 83 PFI 9 CTR 0 AUX 85 PFI 10 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 AI 4 AI 12 AI GND AI 5 AI 13 AI GND AI 6 AI 14 AI GND AI 7 AI 15 AI GND NC AI GND AO 1 AO GND AI 0 AI 8 AI GND AI 1 AI 9 AI GND AI 2 AI 10 AI GND AI 3 AI 11 AI GND AI SENSE AI GND AO 0 AO GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 PFI 8 P2 0 D GND PFI 9 P2 1 ...

Page 189: ...erns section of Chapter 3 Connector and LED Information for information about the USB 6221 Screw Terminal LEDs USB 6221 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing the fuse on the USB 6221 Screw Terminal CTR 0 OUT 89 PFI 12 CTR 0 A 81 PFI 8 CTR 0 Z 83 PFI 9 CTR 0 B 85 PFI 10 CTR 1 SR...

Page 190: ...s Corporation A 17 M Series User Manual USB 6221 BNC USB 6221 BNC Pinout Figure A 5 shows the pinout of the USB 6221 BNC For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information ...

Page 191: ...Appendix A Device Specific Information M Series User Manual A 18 ni com Figure A 5 USB 6221 BNC Top Panel and Pinout ...

Page 192: ...nded signals Differential Signals To connect differential signals determine the type of signal source you are using a floating signal FS source or a ground referenced signal GS source Refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input for more information Table A 5 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Name CTR 0 SRC PFI 8 CTR 0 GATE PFI 9...

Page 193: ...the switch is in the FS position AI x is grounded through a 0 1 µF capacitor in parallel with a 5 kΩ resistor Figure A 7 Analog Input Circuitry Single Ended Signals For each BNC connector that you use for two single ended channels set the source type switch to the GS position This setting disconnects the built in ground reference resistor from the negative terminal of the BNC connector allowing th...

Page 194: ... ended channels are available in single ended measurement modes For information on how to connect your single ended signals AI GND and or AI SENSE refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Analog Output You can access analo...

Page 195: ...nd the Connecting PFI Input Signals section of Chapter 8 PFI for more information USER 1 and USER 2 The USER 1 and USER 2 BNC connectors allow you to use a BNC connector for a digital or timing I O signal of your choice The USER 1 and USER 2 BNC connectors are routed internal to the USB 6221 BNC to the USER 1 and USER 2 screw terminals as shown in Figure A 11 Figure A 11 USER 1 2 BNC Connections P...

Page 196: ...fications Refer to the NI 622x Specifications for more detailed information about the USB 6221 BNC device USB 6221 BNC LED Patterns Refer to the LED Patterns section of Chapter 3 Connector and LED Information for information about the USB 6221 BNC LEDs USB 6221 BNC Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the...

Page 197: ...rs For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more information ...

Page 198: ... 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI GND AI 26 AI 19 AI GND AI 20 AI GND AI 29 AI 22 AI GND AI 31 NC NC NC P0 12 D GND P0 9 P0 14 D GND 5 V D GND D GND P0 16 P0 17 D GND 5 V D GND P0 21 P0 22 D GND P0 25 P0 28 P0 30 AI 16 AI 25 AI 18 AI 27 AI SENSE 2 AI 28 AI 21 AI GND AI GND AI GND AI 30 AI 23 AI GND NC NC D...

Page 199: ...Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the PCI PXI 6224 Refer to ni com for other accessory options including new devices Table A 6 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CTR 0 A 3...

Page 200: ...ssary Refer to the SCXI Advisor available by going to ni com info and entering the info code rdscad for more information SCC Accessories SCC provides portable modular signal conditioning to your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Use Connector 0 of your M Series device to control an SCC module...

Page 201: ...B 68LPR unshielded connector blocks SCC 68 I O connector block with screw terminals general breadboard area bus terminals and four expansion slots for SCC signal conditioning modules SCB 68 shielded connector block with temperature sensor TBX 68 DIN rail mountable connector block TB 27061 front panel mounted terminal block for PXI M Series devices You can use one screw terminal accessory with the ...

Page 202: ...s Analog outputs are also individually shielded SHC68 68 Lower cost shielded cable with 34 twisted pairs of wire RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable enclosure that gives user defined connectivity and flexibility through customized panelettes Visit ni com for more information about the CA 1000 Refer to the Custom Cabling sect...

Page 203: ... Figure A 14 shows the pinout of the PCI PXI 6225 For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connecto...

Page 204: ... 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI 18 AI 27 AI 20 AI 21 AI 30 AI 23 AI 32 AI 41 AI 34 AI 35 AI GND AI 44 AI 37 AI 38 AI 47 AI 48 AI 49 AI 58 AI 51 AI 52 AI 61 AI 54 AI 55 AI GND AI 72 AI 65 AI 66 AI 75 AI 68 AI 69 AI 78 AI 71 AI 16 AI 26 AI 19 AI 29 AI 22 AI 31 AI 40 AI 25 AI 28 AI 33 AI 42 AI 4...

Page 205: ...CI PXI 6225 Accessory and Cabling Options This section describes some cable and accessory options for the PCI PXI 6225 Refer to ni com for other accessory options including new devices Table A 7 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CTR 0 A 37 PFI 8 CTR 0 Z 3 PFI 9 CT...

Page 206: ...o your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Use Connector 0 of your M Series device to control an SCC module carrier Connector 1 cannot be used with SCCs Refer to the SCC Advisor available by going to ni com info and entering the info code rdscav for more information BNC Accessories Using a BNC ...

Page 207: ...ioning modules SCB 68 shielded connector block with temperature sensor make sure the switches are set properly 1 TBX 68 DIN rail mountable connector block TB 27062 front panel mounted terminal block for PXI M Series devices You can use one screw terminal accessory with the signals on either connector of your PCI PXI 6225 device You can use two screw terminal accessories with one M Series device by...

Page 208: ...d pairs of wire RC68 68 Highly flexible unshielded ribbon cable Choosing a Cable for Connector 1 In most applications you can use the following cables with Connector 1 SHC68 68 Shielded cable with 34 twisted pairs of wire Each differential analog input channel on Connector 1 is routed on a twisted pair on the SHC68 68 cable RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connect...

Page 209: ...t Figure A 15 shows the pinout of the USB 6225 Screw Terminal For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note For a ground connection you can connect the shield of a shielded cable to the chassis ground lug depicted in Figure A 15 ...

Page 210: ... AI 34 AI 35 AI 36 AI GND AI 37 AI 38 AI 39 AI 48 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 AI 57 AI 58 AI 59 AI 60 AI 61 AI 62 AI 63 AI GND AI 72 AI 73 AI 74 AI 75 AI 76 AI 77 AI 78 AI 79 AI 49 AI 50 AI 51 AI 52 AI 53 AI 54 AI 55 AI GND AI 64 AI 65 AI 66 AI 67 AI 68 AI 69 AI 70 AI 71 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 113 114 115 ...

Page 211: ...tor and LED Information for information about the USB 6225 Screw Terminal LEDs USB 6225 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing the fuse on the USB 6225 Screw Terminal Table A 8 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 113 PFI 8 C...

Page 212: ...ermination device For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more i...

Page 213: ...1 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 TERMINAL 34 TERMINAL 68 TERMINAL 1 TERMINAL 35 CONNECTOR 1 AI 16 79 PFI 14 P2 6 PFI 12 P2 4 PFI 9 P2 1 D GND PFI 6 P1 6 PFI 5 P1 5 D GND 5 V D GND PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 NC AO 1 AO 0 AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 D GND PFI 8 P2 0 PFI 7 P1 7 PFI 13 P2 5 PFI 4 P1 4 ...

Page 214: ...ination Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the USB 6225 Mass Termination device Refer to ni com for other accessory options including new devices Table A 9 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 ...

Page 215: ...ll analog signals some digital signals and spring terminals for other digital signals BNC 2111 Provides BNC connectivity to 16 single ended analog input signals two analog output signals five DIO PFI signals and the external reference voltage for analog output BNC 2120 Similar to the BNC 2110 and also has a built in function generator quadrature encoder temperature reference and thermocouple conne...

Page 216: ...ion device You can use two screw terminal accessories with one M Series device by using both connectors 2 Cables Choosing a Cable for Connector 0 In most applications you can use the following cables with Connector 0 SH68 68 EP High performance cable with individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shielded twisted pa...

Page 217: ...Custom Cabling section of Chapter 2 DAQ System Overview for more information about custom cabling solutions USB 6225 Mass Termination LED Patterns Refer to the LED Patterns section of Chapter 3 Connector and LED Information for information about the USB 6225 Mass Termination LEDs USB 6225 Mass Termination Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and ...

Page 218: ... the pinout of the PCI PXI 6229 The I O signals appear on two 68 pin connectors For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison...

Page 219: ... 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI GND AI 26 AI 19 AI GND AI 20 AI GND AI 29 AI 22 AI GND AI 31 AO 2 AO 3 NC P0 12 D GND P0 9 P0 14 D GND 5 V D GND D GND P0 16 P0 17 D GND 5 V D GND P0 21 P0 22 D GND P0 25 P0 28 P0 30 AI 16 AI 25 AI 18 AI 27 AI SENSE 2 AI 28 AI 21 AI GND AI GND AI GND AI 30 AI 23 AI GND AO GND AO...

Page 220: ...cessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the PCI PXI 6229 Refer to ni com for other accessory options including new devices Table A 10 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI...

Page 221: ...fo code rdscad for more information SCC Accessories SCC provides portable modular signal conditioning to your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Use Connector 0 of your M Series device to control an SCC module carrier SCC carriers can be used with Connector 1 with NI DAQ 7 4 and later Refer to...

Page 222: ...ock with screw terminals general breadboard area bus terminals and four expansion slots for SCC signal conditioning modules SCB 68 shielded connector block with temperature sensor TBX 68 DIN rail mountable connector block TB 27061 front panel mounted terminal block for PXI M Series devices You can use one screw terminal accessory with the signals on either connector of your M Series device You can...

Page 223: ...uts are also individually shielded SHC68 68 Lower cost shielded cable with 34 twisted pairs of wire RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable enclosure that gives user defined connectivity and flexibility through customized panelettes Visit ni com for more information about the CA 1000 Refer to the Custom Cabling section of Chapte...

Page 224: ...1 M Series User Manual USB 6229 Screw Terminal USB 6229 Screw Terminal Pinout Figure A 18 shows the pinout of the USB 6229 Screw Terminal For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information ...

Page 225: ... 19 AI 27 AI GND AI SENSE 2 AI GND AO 2 AO GND 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 PFI 8 P2 0 D GND PFI 9 P2 1 D GND PFI 10 P2 2 D GND PFI 11 P2 3 D GND PFI 12 P2 4 D GND PFI 13 P2 5 D GND PFI 14 P2 6 D GND PFI 15 P2 7 5 V P0 0 P0 1 P0 2 P0 3 P0 4 P0 5 P0 6 P0 7 PFI 0 P1 0 PFI 1 P1 1 PFI 2 P1 2 PFI 3 P1 3 PFI 4 P1 4 PFI 5 P1 5 PFI 6 P1 6 ...

Page 226: ... of Chapter 3 Connector and LED Information for information about the USB 6229 Screw Terminal LEDs USB 6229 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing the fuse on the USB 6229 Screw Terminal Table A 11 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name ...

Page 227: ...s User Manual A 54 ni com USB 6229 BNC USB 6229 BNC Pinout Figure A 19 shows the pinout of the USB 6229 BNC For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information ...

Page 228: ...Appendix A Device Specific Information National Instruments Corporation A 55 M Series User Manual Figure A 19 USB 6229 BNC Top Panel and Pinout ...

Page 229: ...Differential Signals To connect differential signals determine the type of signal source you are using a floating signal FS source or a ground referenced signal GS source Refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input for more information Table A 12 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Name CTR 0 SRC PFI 8 CTR 0 GATE PFI 9 CTR 0 AUX P...

Page 230: ...229 BNC When the switch is in the FS position AI x is grounded through a 0 1 µF capacitor in parallel with a 5 kΩ resistor Figure A 21 Analog Input Circuitry Single Ended Signals For each BNC connector that you use for two single ended channels set the source type switch to the GS position This setting disconnects the built in ground reference resistor from the negative terminal of the BNC connect...

Page 231: ...s are available in single ended measurement modes For information on how to connect your single ended signals AI GND and or AI SENSE refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Analog Output You can access analog output signa...

Page 232: ...Digital I O and the Connecting PFI Input Signals section of Chapter 8 PFI for more information USER 1 and USER 2 The USER 1 and USER 2 BNC connectors allow you to use a BNC connector for a digital or timing I O signal of your choice The USER 1 and USER 2 BNC connectors are routed internal to the USB 6229 BNC to the USER 1 and USER 2 screw terminals as shown in Figure A 25 Figure A 25 USER 1 2 BNC ...

Page 233: ...er to the NI 622x Specifications for more detailed information about the USB 6229 BNC device USB 6229 BNC LED Patterns Refer to the LED Patterns section of Chapter 3 Connector and LED Information for information about the USB 6229 BNC LEDs USB 6229 BNC Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing th...

Page 234: ...tailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more information ...

Page 235: ...I SENSE AI 11 AI GND AI 2 AI 9 AI GND AI 0 PFI 14 P2 6 PFI 9 P2 1 D GND PFI 5 P1 5 D GND 5 V D GND PFI 12 P2 4 PFI 6 P1 6 PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 APFI 0 NC NC AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 68 34 67 33 66 32 65 31 64 30 63 29 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 ...

Page 236: ...6250 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with one 68 pin connector such as the PCI PXI 6250 Refer to ni com for other accessory options including new devices Table A 13 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CT...

Page 237: ...Q system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Refer to the SCC Advisor available by going to ni com info and entering the info code rdscav for more information BNC Accessories You can use the SHC68 68 EPM shielded cable to connect your DAQ device to BNC accessories such as the following BNC 2110 Provides B...

Page 238: ...sion and motion devices Since PXI devices use PXI backplane signals for timing and synchronization no cables are required Cables In most applications you can use the following cables SHC68 68 EPM1 High performance cable designed specifically for M Series devices It has individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shiel...

Page 239: ...XI PXIe 6251 Pinout Figure A 28 shows the pinout of the NI PCI PCIe PXI PXIe 6251 For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparis...

Page 240: ...I 7 AI 14 AI GND AI 5 AI 12 AI SENSE AI 11 AI GND AI 2 AI 9 AI GND AI 0 PFI 14 P2 6 PFI 9 P2 1 D GND PFI 5 P1 5 D GND 5 V D GND PFI 12 P2 4 PFI 6 P1 6 PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 APFI 0 AO 1 AO 0 AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 68 34 67 33 66 32 65 31 64 30 63 29 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 ...

Page 241: ...6251 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with one 68 pin connector such as the NI PCI PCIe PXI PXIe 6251 Refer to ni com for other accessory options including new devices Table A 14 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OU...

Page 242: ...users should consider the power limits on certain SCC modules without an external power supply Refer to the NI 625x Specifications and the Disk Drive Power Connector section of Chapter 3 Connector and LED Information for information about power limits and increasing the current the device can supply on the 5 V terminal Refer to the SCC Advisor available by going to ni com info and entering the inf...

Page 243: ...d motion devices Since PXI devices use PXI backplane signals for timing and synchronization no cables are required Cables In most applications you can use the following cables SHC68 68 EPM1 High performance cable designed specifically for M Series devices It has individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shielded twi...

Page 244: ...25 26 27 28 29 30 31 32 AI 4 AI 12 AI GND AI 5 AI 13 AI GND AI 6 AI 14 AI GND AI 7 AI 15 AI GND APFI 0 AI GND AO 1 AO GND AI 0 AI 8 AI GND AI 1 AI 9 AI GND AI 2 AI 10 AI GND AI 3 AI 11 AI GND AI SENSE AI GND AO 0 AO GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 PFI 8 P2 0 D GND PFI 9 P2 1 D GND PFI 10 P2 2 D GND PFI 11 P2 3 D GND PFI 12 P2 4 D GND PFI 1...

Page 245: ... Connector and LED Information for information about the USB 6251 Screw Terminal LEDs USB 6251 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing the fuse on the USB 6251 Screw Terminal Table A 15 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 81 ...

Page 246: ... Corporation A 73 M Series User Manual USB 6251 BNC USB 6251 BNC Pinout Figure A 30 shows the pinout of the USB 6251 BNC For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information ...

Page 247: ...Appendix A Device Specific Information M Series User Manual A 74 ni com Figure A 30 USB 6251 BNC Top Panel and Pinout ...

Page 248: ...nded signals Differential Signals To connect differential signals determine the type of signal source you are using a floating signal FS source or a ground referenced signal GS source Refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input for more information Table A 16 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Name CTR 0 SRC PFI 8 CTR 0 GATE PFI ...

Page 249: ...the switch is in the FS position AI x is grounded through a 0 1 µF capacitor in parallel with a 5 kΩ resistor Figure A 32 Analog Input Circuitry Single Ended Signals For each BNC connector that you use for two single ended channels set the source type switch to the GS position This setting disconnects the built in ground reference resistor from the negative terminal of the BNC connector allowing t...

Page 250: ...ended channels are available in single ended measurement modes For information on how to connect your single ended signals AI GND and or AI SENSE refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Analog Output You can access analog...

Page 251: ... to the Connecting Digital I O Signals section of Chapter 6 Digital I O and the Connecting PFI Input Signals section of Chapter 8 PFI for more information APFI You can access the analog programmable function interface signal on the BNC connector labeled APFI 0 Figure A 36 shows the APFI circuitry on the USB 6251 BNC Figure A 36 Analog Programmable Function Interface Circuitry Refer to the Triggeri...

Page 252: ...a digital or timing I O signal of your choice The USER 1 and USER 2 BNC connectors are routed internal to the USB 6251 BNC to the USER 1 and USER 2 screw terminals as shown in Figure A 37 Figure A 37 USER 1 2 BNC Connections USER 2 BNC D GND USER 1 P0 6 P0 5 P0 4 D GND P0 3 P0 2 P0 1 P0 0 D GND 5 V D GND USER 2 PFI 8 P2 0 P0 7 D GND Internal Connection USER 1 BNC D GND Screw Terminal Block ...

Page 253: ...er to the NI 625x Specifications for more detailed information about the USB 6251 BNC device USB 6251 BNC LED Patterns Refer to the LED Patterns section of Chapter 3 Connector and LED Information for information about the USB 6251 BNC LEDs USB 6251 BNC Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing th...

Page 254: ...ermination device For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more i...

Page 255: ...0 AI GND AI 1 AI 8 D GND PFI 8 P2 0 PFI 7 P1 7 PFI 13 P2 5 PFI 4 P1 4 PFI 3 P1 3 PFI 2 P1 2 D GND PFI 15 P2 7 D GND PFI 10 P2 2 PFI 11 P2 3 P0 3 P0 7 P0 2 D GND P0 5 P0 0 D GND AO GND AO GND AI GND AI 7 AI 14 AI GND AI 5 AI 12 AI SENSE AI 11 AI GND AI 2 AI 9 AI GND AI 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 ...

Page 256: ...s Termination Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with one 68 pin connector such as the USB 6251 Mass Termination device Refer to ni com for other accessory options including new devices Table A 17 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45...

Page 257: ... 16 single ended analog input signals two analog output signals five DIO PFI signals and the external reference voltage for analog output BNC 2120 Similar to the BNC 2110 and also has a built in function generator quadrature encoder temperature reference and thermocouple connector BNC 2090A Desktop rack mountable device with 22 BNCs for connecting analog digital and timing signals Screw Terminal A...

Page 258: ...The CA 1000 is a configurable enclosure that gives user defined connectivity and flexibility through customized panelettes Visit ni com for more information about the CA 1000 Refer to the Custom Cabling section of Chapter 2 DAQ System Overview for more information about custom cabling solutions USB 6251 Mass Termination LED Patterns Refer to the LED Patterns section of Chapter 3 Connector and LED ...

Page 259: ...rs For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more information ...

Page 260: ... 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI GND AI 26 AI 19 AI GND AI 20 AI GND AI 29 AI 22 AI GND AI 31 NC NC APFI 1 P0 12 D GND P0 9 P0 14 D GND 5 V D GND D GND P0 16 P0 17 D GND 5 V D GND P0 21 P0 22 D GND P0 25 P0 28 P0 30 AI 16 AI 25 AI 18 AI 27 AI SENSE 2 AI 28 A...

Page 261: ...abling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the PCI PXI 6254 Refer to ni com for other accessory options including new devices Table A 18 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CTR 0 A 3...

Page 262: ... M Series device to control the SCXI section of a PXI SCXI combination chassis such as the PXI 1010 or PXI 1011 The M Series device in the rightmost PXI slot controls the SCXI devices No cables or adapters are necessary Refer to the SCXI Advisor available by going to ni com info and entering the info code rdscad for more information SCC Accessories SCC provides portable modular signal conditioning...

Page 263: ... either connector of your M Series device You can use two BNC accessories with one M Series device by using both connectors Screw Terminal Accessories National Instruments offers several styles of screw terminal connector blocks Use an SHC68 68 EPM shielded cable to connect an M Series device to a connector block such as the following CB 68LP and CB 68LPR unshielded connector blocks SCC 68 I O con...

Page 264: ... separating analog and digital signals Each differential analog input channel is routed on an individually shielded twisted pair of wires Analog outputs are also individually shielded SHC68 68 Lower cost shielded cable with 34 twisted pairs of wire RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable enclosure that gives user defined connect...

Page 265: ... Figure A 41 shows the pinout of the PCI PXI 6255 For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connecto...

Page 266: ...23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI 18 AI 27 AI 20 AI 21 AI 30 AI 23 AI 32 AI 41 AI 34 AI 35 AI GND AI 44 AI 37 AI 38 AI 47 AI 48 AI 49 AI 58 AI 51 AI 52 AI 61 AI 54 AI 55 AI GND AI 72 AI 65 AI 66 AI 75 AI 68 AI 69 AI 78 AI 71 AI 16 AI 26 AI 19 AI 29 AI 22 AI 31 AI 40 AI 25 AI 28 AI 33 AI 42 AI...

Page 267: ...I PXI 6255 Accessory and Cabling Options This section describes some cable and accessory options for the PCI PXI 6255 Refer to ni com for other accessory options including new devices Table A 19 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CTR 0 A 37 PFI 8 CTR 0 Z 3 PFI 9 CT...

Page 268: ...r 1 cannot be used with SCCs Refer to the SCC Advisor available by going to ni com info and entering the info code rdscav for more information BNC Accessories Using a BNC Accessory with Connector 0 Connector 0 of your device is compatible with several BNC accessories BNC 2110 Provides BNC connectivity to all analog signals some digital signals and spring terminals for other digital signals BNC 211...

Page 269: ...itches are set properly 1 TBX 68 DIN rail mountable connector block TB 27062 front panel mounted terminal block for PXI M Series devices You can use one screw terminal accessory with the signals on either connector of your M Series device You can use two screw terminal accessories with one M Series device by using both connectors 3 RTSI Cables Use RTSI bus cables to connect timing and synchronizat...

Page 270: ...ble unshielded ribbon cable Choosing a Cable for Connector 1 In most applications you can use the following cables with Connector 1 SHC68 68 Shielded cable with 34 twisted pairs of wire Each differential analog input channel on Connector 1 is routed on a twisted pair on the SHC68 68 cable RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable ...

Page 271: ...t Figure A 42 shows the pinout of the USB 6255 Screw Terminal For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note For a ground connection you can connect the shield of a shielded cable to the chassis ground lug depicted in Figure A 42 ...

Page 272: ... 32 AI 33 AI 34 AI 35 AI 36 AI GND AI 37 AI 38 AI 39 AI 48 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 AI 57 AI 58 AI 59 AI 60 AI 61 AI 62 AI 63 AI GND AI 72 AI 73 AI 74 AI 75 AI 76 AI 77 AI 78 AI 79 AI 49 AI 50 AI 51 AI 52 AI 53 AI 54 AI 55 AI GND AI 64 AI 65 AI 66 AI 67 AI 68 AI 69 AI 70 AI 71 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 113...

Page 273: ...tor and LED Information for information about the USB 6255 Screw Terminal LEDs USB 6255 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing the fuse on the USB 6255 Screw Terminal Table A 20 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 113 PFI 8 ...

Page 274: ...ermination device For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more i...

Page 275: ...9 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 CONNECTOR 1 AI 16 79 PFI 14 P2 6 PFI 12 P2 4 PFI 9 P2 1 D GND PFI 6 P1 6 PFI 5 P1 5 D GND 5 V D GND PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 APFI 0 AO 1 AO 0 AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 D GND PFI 8 P2 0 PFI 7 P1 7 PFI 13 P2 5 PFI 4 P1 4 PFI 3 P1 3 PFI 2 P1 2 D GND PFI 15 P2...

Page 276: ...ination Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the USB 6255 Mass Termination device Refer to ni com for other accessory options including new devices Table A 21 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0...

Page 277: ...all analog signals some digital signals and spring terminals for other digital signals BNC 2111 Provides BNC connectivity to 16 single ended analog input signals two analog output signals five DIO PFI signals and the external reference voltage for analog output BNC 2120 Similar to the BNC 2110 and also has a built in function generator quadrature encoder temperature reference and thermocouple conn...

Page 278: ...ion device You can use two screw terminal accessories with one M Series device by using both connectors 2 Cables Choosing a Cable for Connector 0 In most applications you can use the following cables with Connector 0 SH68 68 EP High performance cable with individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shielded twisted pa...

Page 279: ... Custom Cabling section of Chapter 2 DAQ System Overview for more information about custom cabling solutions USB 6255 Mass Termination LED Patterns Refer to the LED Patterns section of Chapter 3 Connector and LED Information for information about the USB 6255 Mass Termination LEDs USB 6255 Mass Termination Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and...

Page 280: ...59 Pinout Figure A 44 shows the pinout of the NI PCI PCIe PXI PXIe 6259 The I O signals appear on two 68 pin connectors For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the...

Page 281: ...30 63 29 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI GND AI 26 AI 19 AI GND AI 20 AI GND AI 29 AI 22 AI GND AI 31 AO 2 AO 3 APFI 1 P0 12 D GND P0 9 P0 14 D GND 5 V D GND D GND P0 16 P0 17 D GND 5 V D GND P0 21 P0 22 D GND P0 25 P0 28 P0 30 AI 16 AI 25 AI 18 AI 27 AI SEN...

Page 282: ...I PXIe 6259 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the NI PCI PCIe PXI PXIe 6259 Refer to ni com for other accessory options including new devices Table A 22 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AU...

Page 283: ...dscad for more information SCC Accessories SCC provides portable modular signal conditioning to your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Use Connector 0 of your M Series device to control an SCC module carrier SCC carriers can be used with Connector 1 with NI DAQ 7 4 and later Note PCI Express ...

Page 284: ...ed cable to connect an M Series device to a connector block such as the following CB 68LP and CB 68LPR unshielded connector blocks SCC 68 I O connector block with screw terminals general breadboard area bus terminals and four expansion slots for SCC signal conditioning modules SCB 68 shielded connector block with temperature sensor TBX 68 DIN rail mountable connector block TB 27061 front panel mou...

Page 285: ...puts are also individually shielded SHC68 68 Lower cost shielded cable with 34 twisted pairs of wire RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable enclosure that gives user defined connectivity and flexibility through customized panelettes Visit ni com for more information about the CA 1000 Refer to the Custom Cabling section of Chapt...

Page 286: ...3 M Series User Manual USB 6259 Screw Terminal USB 6259 Screw Terminal Pinout Figure A 45 shows the pinout of the USB 6259 Screw Terminal For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information ...

Page 287: ...18 AI 26 AI GND AI 19 AI 27 AI GND AI SENSE 2 AI GND AO 2 AO GND 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 PFI 8 P2 0 D GND PFI 9 P2 1 D GND PFI 10 P2 2 D GND PFI 11 P2 3 D GND PFI 12 P2 4 D GND PFI 13 P2 5 D GND PFI 14 P2 6 D GND PFI 15 P2 7 5 V P0 0 P0 1 P0 2 P0 3 P0 4 P0 5 P0 6 P0 7 PFI 0 P1 0 PFI 1 P1 1 PFI 2 P1 2 PFI 3 P1 3 PFI 4 P1 4 PFI ...

Page 288: ...n of Chapter 3 Connector and LED Information for information about the USB 6259 Screw Terminal LEDs USB 6259 Screw Terminal Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing the fuse on the USB 6259 Screw Terminal Table A 23 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name...

Page 289: ...s User Manual A 116 ni com USB 6259 BNC USB 6259 BNC Pinout Figure A 46 shows the pinout of the USB 6259 BNC For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information ...

Page 290: ...Appendix A Device Specific Information National Instruments Corporation A 117 M Series User Manual Figure A 46 USB 6259 BNC Top Panel and Pinout ...

Page 291: ...Differential Signals To connect differential signals determine the type of signal source you are using a floating signal FS source or a ground referenced signal GS source Refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input for more information Table A 24 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Name CTR 0 SRC PFI 8 CTR 0 GATE PFI 9 CTR 0 AUX P...

Page 292: ...6259 BNC When the switch is in the FS position AI x is grounded through a 0 1 µF capacitor in parallel with a 5 kΩ resistor Figure A 48 Analog Input Circuitry Single Ended Signals For each BNC connector that you use for two single ended channels set the source type switch to the GS position This setting disconnects the built in ground reference resistor from the negative terminal of the BNC connec...

Page 293: ...ls are available in single ended measurement modes For information on how to connect your single ended signals AI GND and or AI SENSE refer to the Connecting Analog Input Signals section of Chapter 4 Analog Input For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Analog Output You can access analog output sign...

Page 294: ...cuitry Refer to the Connecting Digital I O Signals section of Chapter 6 Digital I O and the Connecting PFI Input Signals section of Chapter 8 PFI for more information APFI You can access the analog programmable function interface signals on the BNC connectors labeled APFI 0 1 Figure A 52 shows the APFI circuitry on the USB 6259 BNC Figure A 52 Analog Programmable Function Interface Circuitry Refer...

Page 295: ...nal to the USB 6259 BNC to the USER 1 and USER 2 screw terminals as shown in Figure A 53 Figure A 53 USER 1 2 BNC Connections Figure A 54 shows an example of how to use the USER 1 and USER 2 BNCs To access the PFI 8 signal from a BNC connect USER 1 on the screw terminal block to PFI 8 with a wire USER 2 BNC D GND USER 1 P0 6 P0 5 P0 4 D GND P0 3 P0 2 P0 1 P0 0 D GND 5 V D GND USER 2 PFI 8 P2 0 P0 ...

Page 296: ...USB 6259 BNC device USB 6259 BNC LED Patterns Refer to the LED Patterns section of Chapter 3 Connector and LED Information for information about the USB 6259 BNC LEDs USB 6259 BNC Fuse Replacement Refer to the USB Device Fuse Replacement section of Chapter 3 Connector and LED Information for information about the replacing the fuse on the USB 6259 BNC BNC Cable PFI 8 Signal USER 1 P0 6 P0 5 P0 4 D...

Page 297: ...vice For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more information ...

Page 298: ...2 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 P0 30 P0 28 P0 25 D GND P0 22 P0 21 D GND 5 V D GND P0 17 P0 16 D GND D GND 5 V D GND P0 14 P0 9 D GND P0 12 APFI 1 AO 3 AO 2 AI 31 AI GND AI 22 AI 29 AI GND AI 20 AI GND AI 19 AI 26 AI GND AI 17 AI 24 D GND P0 24 P0 23 P0 29 P0 20 P0 19 P0 18 D GND P0 31 D GN...

Page 299: ...sory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the USB 6259 Mass Termination device Refer to ni com for other accessory options including new devices Table A 25 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 1...

Page 300: ...6 single ended analog input signals two analog output signals five DIO PFI signals and the external reference voltage for analog output BNC 2120 Similar to the BNC 2110 and also has a built in function generator quadrature encoder temperature reference and thermocouple connector BNC 2090A Desktop rack mountable device with 22 BNCs for connecting analog digital and timing signals You can use one BN...

Page 301: ...elded R68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable enclosure that gives user defined connectivity and flexibility through customized panelettes Visit ni com for more information about the CA 1000 Refer to the Custom Cabling section of Chapter 2 DAQ System Overview for more information about custom cabling solutions USB 6259 Mass Termi...

Page 302: ...etailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more information ...

Page 303: ...AI SENSE AI 11 AI GND AI 2 AI 9 AI GND AI 0 PFI 14 P2 6 PFI 9 P2 1 D GND PFI 5 P1 5 D GND 5 V D GND PFI 12 P2 4 PFI 6 P1 6 PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 APFI 0 NC NC AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 68 34 67 33 66 32 65 31 64 30 63 29 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47...

Page 304: ...6280 Accessory and Cabling Options This section describes some cable and accessory options for M Series devices with one 68 pin connector such as the PCI PXI 6280 Refer to ni com for other accessory options including new devices Table A 26 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CT...

Page 305: ...AQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Refer to the SCC Advisor available by going to ni com info and entering the info code rdscav for more information BNC Accessories You can use the SHC68 68 EPM shielded cable to connect your DAQ device to BNC accessories such as the following BNC 2110 Provides ...

Page 306: ...sion and motion devices Since PXI devices use PXI backplane signals for timing and synchronization no cables are required Cables In most applications you can use the following cables SHC68 68 EPM1 High performance cable designed specifically for M Series devices It has individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shiel...

Page 307: ...iption of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more information ...

Page 308: ... 14 AI GND AI 5 AI 12 AI SENSE AI 11 AI GND AI 2 AI 9 AI GND AI 0 PFI 14 P2 6 PFI 9 P2 1 D GND PFI 5 P1 5 D GND 5 V D GND PFI 12 P2 4 PFI 6 P1 6 PFI 1 P1 1 PFI 0 P1 0 D GND D GND 5 V D GND P0 6 P0 1 D GND P0 4 APFI 0 AO 1 AO 0 AI 15 AI GND AI 6 AI 13 AI GND AI 4 AI GND AI 3 AI 10 AI GND AI 1 AI 8 68 34 67 33 66 32 65 31 64 30 63 29 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 ...

Page 309: ...y and Cabling Options This section describes some cable and accessory options for M Series devices with one 68 pin connector such as the PCI PXI 6281 Refer to ni com for other accessory options including new devices Table A 27 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PFI 12 CTR 0 A 37 PFI ...

Page 310: ...ing to your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Refer to the SCC Advisor available by going to ni com info and entering the info code rdscav for more information BNC Accessories You can use the SHC68 68 EPM shielded cable to connect your DAQ device to BNC accessories such as the following BNC 2...

Page 311: ...on devices Since PXI devices use PXI backplane signals for timing and synchronization no cables are required Cables In most applications you can use the following cables SHC68 68 EPM1 High performance cable designed specifically for M Series devices It has individual bundles separating analog and digital signals Each differential analog input channel is routed on an individually shielded twisted p...

Page 312: ...8 pin connectors For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more in...

Page 313: ... 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI GND AI 26 AI 19 AI GND AI 20 AI GND AI 29 AI 22 AI GND AI 31 NC NC APFI 1 P0 12 D GND P0 9 P0 14 D GND 5 V D GND D GND P0 16 P0 17 D GND 5 V D GND P0 21 P0 22 D GND P0 25 P0 28 P0 30 AI 16 AI 25 AI 18 AI 27 AI SENSE 2 AI 28 AI 21 AI GND ...

Page 314: ...ccessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the PCI PXI 6284 Refer to ni com for other accessory options including new devices Table A 28 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PF...

Page 315: ...to the SCXI Advisor available by going to ni com info and entering the info code rdscad for more information SCC Accessories SCC provides portable modular signal conditioning to your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Use Connector 0 of your M Series device to control an SCC module carrier SCC...

Page 316: ... CB 68LP and CB 68LPR unshielded connector blocks SCC 68 I O connector block with screw terminals general breadboard area bus terminals and four expansion slots for SCC signal conditioning modules SCB 68 shielded connector block with temperature sensor TBX 68 DIN rail mountable connector block TB 27061 front panel mounted terminal block for PXI M Series devices You can use one screw terminal acces...

Page 317: ...puts are also individually shielded SHC68 68 Lower cost shielded cable with 34 twisted pairs of wire RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable enclosure that gives user defined connectivity and flexibility through customized panelettes Visit ni com for more information about the CA 1000 Refer to the Custom Cabling section of Chapt...

Page 318: ...8 pin connectors For a detailed description of each signal refer to the I O Connector Signal Descriptions section of Chapter 3 Connector and LED Information Note M Series devices may be used with most E Series accessories However some E Series accessories use different terminal names Refer to the M Series and E Series Pinout Comparison section of Chapter 3 Connector and LED Information for more in...

Page 319: ...9 62 28 61 27 60 26 59 25 58 24 57 23 56 22 55 21 54 20 53 19 52 18 51 17 50 16 49 15 48 14 47 13 46 12 45 11 44 10 43 9 42 8 41 7 40 6 39 5 38 4 37 3 36 2 35 1 AI 24 AI 17 AI GND AI 26 AI 19 AI GND AI 20 AI GND AI 29 AI 22 AI GND AI 31 AO 2 AO 3 APFI 1 P0 12 D GND P0 9 P0 14 D GND 5 V D GND D GND P0 16 P0 17 D GND 5 V D GND P0 21 P0 22 D GND P0 25 P0 28 P0 30 AI 16 AI 25 AI 18 AI 27 AI SENSE 2 AI...

Page 320: ...ccessory and Cabling Options This section describes some cable and accessory options for M Series devices with two 68 pin connectors such as the PCI PXI 6289 Refer to ni com for other accessory options including new devices Table A 29 Default NI DAQmx Counter Timer Pins Counter Timer Signal Default Connector 0 Pin Number Name CTR 0 SRC 37 PFI 8 CTR 0 GATE 3 PFI 9 CTR 0 AUX 45 PFI 10 CTR 0 OUT 2 PF...

Page 321: ...to the SCXI Advisor available by going to ni com info and entering the info code rdscad for more information SCC Accessories SCC provides portable modular signal conditioning to your DAQ system To connect your M Series device to an SCC module carrier such as the SC 2345 SC 2350 or SCC 68 use an SHC68 68 EPM shielded cable Use Connector 0 of your M Series device to control an SCC module carrier SCC...

Page 322: ... CB 68LP and CB 68LPR unshielded connector blocks SCC 68 I O connector block with screw terminals general breadboard area bus terminals and four expansion slots for SCC signal conditioning modules SCB 68 shielded connector block with temperature sensor TBX 68 DIN rail mountable connector block TB 27061 front panel mounted terminal block for PXI M Series devices You can use one screw terminal acces...

Page 323: ...puts are also individually shielded SHC68 68 Lower cost shielded cable with 34 twisted pairs of wire RC68 68 Highly flexible unshielded ribbon cable Custom Cabling and Connectivity The CA 1000 is a configurable enclosure that gives user defined connectivity and flexibility through customized panelettes Visit ni com for more information about the CA 1000 Refer to the Custom Cabling section of Chapt...

Page 324: ...rnal to the M Series device that will be used as a clock or a trigger This timing describes the delays involved with importing the external signal into the device Internal Timing Internal timing describes the relationship between internal signals In general how the input and other internal signals get used to generate output signals such as the convert signal Output Timing Output timing refers to ...

Page 325: ...timebases or signals coming from other blocks POUT Refers to any output signal right before is driven to an output terminal Convert Clock Timebase and Sync Convert Clock Timebase Convert Clock Timebase is the source signal used to generate the signal that will actually cause the ADC to do a conversion p_AI_Convert This signal can be an internal or external timebase Start Terminal Selected Referenc...

Page 326: ...A Reference Trigger is a trigger that can stop the AI timing engine If the Reference Trigger is enabled the AI timing engine will stop acquiring data once it sees a valid event on the Reference Trigger and it has acquired the posttrigger number of samples This signal can come from external signals a software command or internal sources The Selected Reference Trigger is the signal chosen to be the ...

Page 327: ...nput Timing and the Analog Input Timing Engine Figure B 3 Input Timing Diagram Start Terminal Selected Reference Trigger Reference Trigger Terminal Terminal Selected Sample Clock Terminal Terminal Terminal Selected Start RTSI Terminal Terminal Terminal Selected Pause Trigger SI Counter Block SI2 Counter Block SI_TC Sample Clock Timebase Sync Sample Clock Timebase Convert Clock Timebase Sync Conver...

Page 328: ...t Clock Timebase is the inverted version of the Convert Clock Timebase signal The idea is to use the falling edge of the original signal to synchronize external signals before the rising edge of the Convert Clock Timebase occurs after polarity selection This case is the one described in this section When Convert Clock Timebase is not going to be divided by the SI2 counter in the case of an externa...

Page 329: ...Timebase signal is a copy without inversion of the signal The idea is that for each significant edge of the Sample Clock Timebase there is a significant edge of the Sync Sample Clock Timebase signal that occurs before Sample Clock Timebase and that can be used to synchronize the input triggers The source for Convert Clock Timebase and Sample Clock Timebase is the internal signal bus _i The timing ...

Page 330: ... Period 50 0 t4 Delay to Sample Clock Timebase PFI 3 8 9 3 RTSI 3 5 9 0 STAR 3 0 6 4 t5 Delay to Sync Sample Clock Timebase PFI 3 4 8 5 RTSI 3 2 8 3 STAR 2 7 5 6 t6 Delay to Convert Clock Timebase PFI 4 1 10 2 RTSI 3 9 9 9 STAR 3 4 7 3 t7 Delay to Sync Convert Clock Timebase PFI 3 6 8 9 RTSI 3 3 8 6 STAR 2 9 6 0 _i Sync Convert Clock Timebase Sample Clock Timebase Sync Sample Clock Timebase Conver...

Page 331: ...ock Timebase If the SI2 counter is not being used external convert case the Convert Clock Timebase is assumed to be not free running and the relationship between the Convert Clock Timebase and the Sync Convert Clock Timebase is an asynchronous delay Whether the SI2 counter is used or not the timing parameters in the generation of Convert Clock are the same starting at the Convert Clock Timebase si...

Page 332: ...ay from _i to Sync Convert Clock Timebase PFI 6 4 15 9 RTSI 6 0 15 6 STAR 5 7 12 9 t9 Delay from _i to Convert Clock Timebase PFI 16 2 39 1 RTSI 16 0 38 8 STAR 15 5 36 1 t10 Delay from Convert Clock Timebase to p_AI_Convert 6 0 13 0 t11 Delay from Convert Clock Timebase to Convert Clock when exported to an external terminal POUT PFI 4 6 10 8 RTSI 4 6 10 5 _i POUT Sync Convert Clock Timebase Conver...

Page 333: ...iming levels in the AI section the Convert Clock Timebase and the Sample Clock Timebase timing level for synchronization to each clock Once the Convert Clock Timebase timing domain has received a valid Start the AI timing engine is ready to start generating converts as soon as it receives a Sample Clock beginning of a sample Once the Sample Clock Timebase domain has received a valid Start the AI t...

Page 334: ...d Reference Trigger Reference Trigger Terminal Terminal Selected Sample Clock Terminal Terminal Terminal RTSI Terminal Terminal Terminal Selected Pause Trigger SI Counter Block SI2 Counter Block SI_TC Sample Clock Timebase Sync Sample Clock Timebase Convert Clock Timebase Sync Convert Clock Timebase SI Start Pause Trigger SI2_TC p_AI_Convert Start 1 _i POUT _i POUT Selected Start Sync Convert Cloc...

Page 335: ...t15 Selected Start Hold Time to Sync Convert Clock Timebase 0 t16 Sync Convert Clock Timebase to Start 0 9 2 4 t17 Start to POUT PFI 1 1 3 1 RTSI 1 1 2 7 Start Terminal Selected Reference Trigger Reference Trigger Terminal Terminal Selected Sample Clock Terminal Terminal Terminal Selected Start RTSI Terminal Terminal Terminal Selected Pause Trigger SI Counter Block SI2 Counter Block SI_TC Sample C...

Page 336: ...posttrigger conversions to take before stopping The Reference Trigger can come from external or internal sources and its source is selected with a multiplexer Its output is called the Selected Reference Trigger Table B 6 Sample Clock Timebase Timing Time Description Line Min ns Max ns t18 Delay to Selected Start PFI 3 4 8 8 RTSI 3 3 8 5 STAR 2 7 5 7 t19 Selected Start Setup Hold Time to Sync Sampl...

Page 337: ...minal Terminal Selected Sample Clock Terminal Terminal Terminal Selected Start RTSI Terminal Terminal Terminal Selected Pause Trigger SI Counter Block SI2 Counter Block SI_TC Sample Clock Timebase Sync Sample Clock Timebase Convert Clock Timebase Sync Convert Clock Timebase Pause Trigger p_AI_Convert Start 1 SI2_TC SI Start POUT _i POUT Selected Reference Trigger Sync Convert Clock Timebase Refere...

Page 338: ...he sources for Sample Clock are at the _i level and are selected using a multiplexer The output of this multiplexer is called Selected Sample Clock Table B 7 Reference Trigger Timing Time Description Line Min ns Max ns t22 Delay to the Selected Reference Trigger PFI 3 6 8 9 RTSI 3 4 8 4 STAR 2 9 5 6 t23 Selected Reference Trigger Setup to Sync Convert Clock Timebase 1 5 t24 Selected Reference Trig...

Page 339: ...igger Terminal Terminal Selected Sample Clock Terminal Terminal Terminal Selected Start RTSI Terminal Terminal Terminal Selected Pause Trigger SI Counter Block SI_TC Sample Clock Timebase Sync Sample Clock Timebase Convert Clock Timebase Sync Convert Clock Timebase SI Start Pause Trigger p_AI_Convert Start 1 RST SI2 Counter Block _i POUT Selected Sample Clock Sync Convert Clock Timebase Sample Clo...

Page 340: ... Description Line Min ns Max ns t27 Delay to Selected Sample Clock PFI 3 5 8 9 RTSI 3 4 8 6 STAR 2 8 5 9 t28 Selected Sample Clock Setup time to Sync Convert Clock Timebase 1 5 t29 Selected Sample Clock Hold time to Sync Convert Clock Timebase 0 t30 Sync Convert Clock Timebase to Sample Clock 2 4 5 8 t31 Sample Clock to POUT PFI 2 4 5 5 RTSI 3 2 6 8 Table B 9 AI_Sample_In_Progress Timing Time Desc...

Page 341: ...called Selected Pause Trigger Figure B 18 Pause Trigger and the Analog Input Timing Engine Start Terminal Selected Reference Trigger Reference Trigger Terminal Terminal Selected Sample Clock Terminal Terminal Terminal Selected Start RTSI Terminal Terminal Terminal Selected Pause Trigger SI Counter Block SI2 Counter Block SI_TC Sample Clock Timebase Sync Sample Clock Timebase Convert Clock Timebase...

Page 342: ...ble B 11 describe output timing The delays presented in this section assume a 200 pF load on PFI lines and a 50 pF load on RTSI lines Actual delays will vary with the actual load Table B 10 Pause Trigger Timing Time Description Line Min ns Max ns t34 _i to Selected Gate PFI 3 2 7 8 RTSI 3 0 7 5 STAR 2 5 4 9 t35 Selected Pause Trigger Setup Time to Sync Convert Clock Timebase 1 5 t36 Hold Sync Conv...

Page 343: ...I 7 5 25 9 RTSI 6 0 13 9 Start Terminal Selected Reference Trigger Reference Trigger Terminal Terminal Selected Sample Clock Terminal Terminal Terminal Selected Start RTSI Terminal Terminal Terminal Selected Pause Trigger SI Counter Block SI2 Counter Block SI_TC Sample Clock Timebase Sync Sample Clock Timebase Convert Clock Timebase Sync Convert Clock Timebase SI Start Pause Trigger p_AI_Convert S...

Page 344: ...ice external terminals Figure B 22 gives an overview of analog output timing Figure B 22 M Series Analog Output Timing The following signals are used in Figure B 22 and in the following sections Sample Clock This signal multiplied by the digital to analog conversions This signal is routed to the DAC and in every pulse the DAC will perform a data conversion This signal can come directly from an ext...

Page 345: ...tart This signal can come from a software command or an external pulse Selected Start is the output of the selection block for the Start Trigger source Pause Trigger Selected Pause The waveform generation can be paused using the pause trigger When enabled the waveform generation will occur as long as the gate is enabled The generation will be paused if the gate is disabled This signal can come fro...

Page 346: ...log output internal clock timing can be derived from Table B 13 Figure B 24 External Update Source Clock Insertions Timing Diagram Table B 12 Input Timing Time From To Min ns Max ns t1 PFI PFI_i 4 1 6 4 15 2 19 2 RTSI RTSI_i 0 9 2 2 2 0 3 0 STAR STAR_i 0 9 2 8 The delay ranges given for PFI and RTSI represent the fastest and slowest terminal routing within the trigger group for a given condition m...

Page 347: ... output timing engine for rising edge operation will cause the external signals to be synchronized on the falling edge of the Sample Clock Timebase which corresponds to the rising edge of Sync Sample Clock Timebase Figure B 25 Sample Clock Timebase and the Sync Sample Clock Timebase Timing Diagram Table B 13 External Update Source Clock Insertions Timing Time From To Min ns Max ns t2 Signal_i Samp...

Page 348: ...igger Timing Diagram Pause Trigger The analog output Pause Trigger can be used to pause an ongoing generation It is received on the rising edge of Sync Sample Clock Timebase Table B 15 Start Trigger Timing from Signal_i to Selected Start Time From To Min ns Max ns t6 Signal_i Selected Start 2 9 9 8 Table B 16 Start Trigger Setup and Hold Timing Time Parameter Min ns Max ns t7 Setup 1 5 t8 Hold 0 S...

Page 349: ...times of the internal DFF must be met Recall that a terminal is a PFI pin RTSI pin or PXI_Star pin Let TriggerDelay be the delay from the trigger terminal to the DFF Let ClockDelay be the delay from the clock terminal to the DFF Table B 17 Pause Trigger Timing from Signal_i to Selected Pause Time From To Min ns Max ns t9 Signal_i Selected Pause 1 7 7 8 Table B 18 Pause Trigger Setup and Hold Timin...

Page 350: ...e sum of the input timing shown in Table B 12 and insertion timing shown in Table B 13 TriggerDelay is the sum of the input timing shown in Table B 12 and internal timing shown in Tables B 15 and B 17 For setup calculations use the maximum timing parameters For hold calculations use the minimum timing parameters For input timing as shown in Table B 12 two numbers are given for the maximum delay an...

Page 351: ... from the best case and worst case terminals Start Trigger As an output the Start Trigger is routed as an asynchronous pulse The actual signal that gets routed is the Selected Start signal so there is no synchronous delay involved Figure B 31 Start Trigger Path Figure B 32 Start Trigger Output Delay Timing Diagram Table B 19 Start Trigger Output Delay Timing Time From To Min ns Max ns t12 Selected...

Page 352: ...se Trigger Output Routing Delay Timing Diagram Sample Clock The rising edge of the Sample Clock is output synchronous to the Sample Clock Timebase It can be calculated by adding the Sample Clock Timebase insertion to the delay in Table B 21 The exported Sample Clock signal is active low each falling edge representing a conversion Table B 20 Pause Trigger Output Routing Delay Timing Time From To Mi...

Page 353: ...scribe digital waveform acquisition timing delays and requirements refer to the circuitry shown in Figure B 37 In the figure P0 PFI RTSI and PXI_STAR represent signals at connector pins of the M Series device The other named signals represent internal signals Table B 21 Sample Clock Delay Timing Time From To Min ns Max ns t14 AO Sample Clock PFI 9 7 10 7 31 1 34 3 AO Sample Clock RTSI 8 8 9 1 21 3...

Page 354: ...uisition timing delays and requirements Your inputs must meet the requirements to ensure proper behavior Figure B 38 Digital Waveform Acquisition Timing Delays DI Waveform Acquisition FIFO PFI Output DI Sample Clock Other Internal Signals PFI_i RTSI_i or PXI_STAR_i P0_i P0 PFI RTSI or PXI_STAR PFI RTSI or PXI_STAR PFI_i RTSI_i or PXI_STAR_i DI Sample Clock P0 P0_i PFI Output t1 t2 t3 t3 t2 t4 t4 t...

Page 355: ...for a given condition maximum or minimum timing This difference can be useful when two external signals will be used together and the relative timing between the signals is important When DI Sample Clock is routed to a PFI output pin the pulse width of the output is independent of the pulse width of the input The pulse width is specified in a number of periods of the 80 MHz Timebase Table B 23 DI ...

Page 356: ...s represent internal signals Figure B 39 Digital Waveform Generation Timing Circuitry Figure B 40 and Tables B 24 and B 25 describe the digital waveform generation timing delays and requirements Your inputs must meet the requirements to ensure proper behavior Figure B 40 Digital Waveform Acquisition Timing Delays DO Waveform Generation FIFO PFI Output P0 DO Sample Clock Other Internal Signals PFI_...

Page 357: ... 9 5 t14 DO Sample Clock P0 7 5 27 5 t15 DO Sample Clock PFI output 8 0 29 8 t16 PFI output high PFI output low Two periods of 80 MHz Timebase Three periods of 80 MHz Timebase The delay ranges given for PFI and RTSI represent the fastest and slowest terminal routing within the trigger group for a given condition maximum or minimum timing This difference can be useful when two external signals will...

Page 358: ...Timing Time From To Min ns Max ns t1 PFI PFI_i 5 2 6 2 18 2 22 0 RTSI RTSI_i 2 0 2 5 5 0 6 0 STAR STAR_i 0 9 2 5 The delay ranges given for PFI and RTSI represent the fastest and slowest terminal routing within the trigger group for a given condition maximum or minimum timing This difference can be useful when two external signals will be used together and the relative timing between the signals i...

Page 359: ... referenced to these two signals Any internal signal refers to signals with _i from the previous table or signals coming from another subsystem inside the M Series device It does not include internal timebases or the PXI_CLK10 Figure B 43 Selected Gate Delays Timing Diagram Figure B 44 Selected Source Delays Timing Diagram Table B 27 Selected Gate Delays Timing Time From To Min ns Max ns t2 PFI_i ...

Page 360: ... Source Delays Timing Time From To Min ns Max ns t3 PFI_i RTSI_i PXI_STAR_i or any internal signal Selected Source 8 0 21 0 20 MHz Timebase Selected Source 1 5 4 0 100 kHz Timebase Selected Source 1 5 4 0 80 MHz Timebase Selected Source 1 0 2 5 PXI_CLK10 Selected Source 1 0 3 5 Table B 29 Selected Gate to Count Enable Delays Time Synchronization Mode Gating Mode Min ns Max ns t4 80 MHz Source Edge...

Page 361: ...g Requirements Table B 30 Counter n Source Timing Time Description Synchronization Mode Min ns Max ns t5 Counter n Source Period 80 MHz Source 12 5 Other Internal Source 25 0 External Source 50 0 t6 Counter n Source Pulse Width 80 MHz Source 6 2 Other Internal Source 12 5 External Source 16 0 The times in this table are measured at the pin of the M Series device For example t5 specifies the minimu...

Page 362: ... drives Counter n Gate The general case all other combinations of signals driving Source and Gate Figure B 48 and Table B 32 show the setup and hold requirements at the PFI pins for the first case where a PFI pin drives Counter n Source and a different PFI pin drives Counter n Gate Figure B 48 Gate to Source Setup and Hold Timing Diagram Table B 31 Counter n Gate Pulse Width Timing Time Descriptio...

Page 363: ...of the General Case Calculate the setup and hold time requirements when the Gate and Source come from PFI lines and the Gate is used in level mode Note This example shows how we determine the setup and hold times for the PFI to PFI example above first case using level gating Table B 32 Gate to Source Setup and Hold Timing Time Description Gating Mode Synchronization Mode Min ns Max ns t8S Setup ti...

Page 364: ...Delay PFI to PFI_i 22 0 ns PFI_i to Selected Gate 6 0 ns Selected Gate to Count Enable Level 18 0 ns Count Enable Setup Time 1 5 ns 47 5 ns Source Delay PFI to PFI_i 18 2 ns PFI_i to Selected Source 21 0 ns 39 2 ns TSetup 47 5 ns 39 2 ns 8 3 ns Gate Delay PFI to PFI_i 5 2 ns PFI_i to Selected Gate 1 0 ns Selected Gate to Count Enable Level 6 0 ns Count Enable Hold Time 0 0 ns 12 2 ns Source Delay ...

Page 365: ...d Table B 34 show the output delays Figure B 50 Output Delays Table B 34 Output Delays Timing Time Line Min ns Max ns t10 1 0 4 0 t11 PFI 7 5 28 2 RTSI 6 5 18 0 t12 PFI 8 5 32 2 RTSI 7 5 22 0 t13 PFI 7 5 28 7 RTSI 6 5 18 0 t10 t11 t12 t13 Selected Source PFI RTSI Counter n Gate Selected Gate PFI RTSI Counter n Source PFI RTSI Counter n Internal Out Out_o ...

Page 366: ... Edge counting Pulse width measurements Two signal edge separation measurements All other measurements use edge gating mode Quadrature and Two Pulse Encoder Timing Counter n A Counter n B and Counter n Z described in the Counter n A Counter n B and Counter n Z Signals section of Chapter 7 Counters are used in position measurements using quadrature encoder or two pulse encoder counting modes Table ...

Page 367: ...der Timing Time Description Min ns Max ns t14 Counter n A Period 50 0 t15 Counter n A Pulse Width 25 0 t16 Counter n B Period 50 0 t17 Counter n B Pulse Width 25 0 t18 Counter n Z Pulse Width 25 0 t19 Delay from Counter n A to Counter n B 25 0 t20 Delay from Counter n B to Counter n A 25 0 The times in this table are measured at the pin of the M Series device For example t14 specifies the minimum ...

Page 368: ...Oscillator Time From To Min ns Max ns t1 Onboard 80 MHz Oscillator 80 MHz Timebase 4 0 9 0 t2 80 MHz Timebase 20 MHz Timebase 0 5 2 5 t3 80 MHz Timebase 100 kHz Timebase 1 0 5 0 Table B 37 Generating Different Clocks Using an External Reference Clock and the PLL Time From To Min ns Max ns t4 80 MHz Timebase 20 MHz Timebase 1 5 5 0 t5 The source of the external reference clock RTSI 0 7 STAR_TRIG PX...

Page 369: ...AI 0 To circumvent this problem use a voltage follower that has operational amplifiers op amps with unity gain for each high impedance source before connecting to an M Series device Otherwise you must decrease the sample rate for each channel Another common cause of channel crosstalk is due to sampling among multiple channels at various gains In this situation the settling times can increase For m...

Page 370: ...log Input for more information How can I use the AI Sample Clock and AI Convert Clock signals on an M Series device to sample the AI channel s M Series devices use ai SampleClock and ai ConvertClock to perform interval sampling As Figure C 1 shows ai SampleClock controls the sample period which is determined by the following equation 1 sample period sample rate Figure C 1 ai SampleClock and ai Con...

Page 371: ...plicate count prevention ensures that the counter returns correct data for counter measurement in some applications where a slow or non periodic external source is used Refer to the Duplicate Count Prevention section of Chapter 7 Counters for more information How do I connect counter signals to my M Series device The Default Counter Timer Pinouts section of Chapter 7 Counters has information about...

Page 372: ...cument highlights the main differences to remember when moving an application from E Series to M Series devices To access this document go to ni com info and enter the info code rde2m1 Using E Series Accessories with M Series Devices KnowledgeBase describes how to use 68 pin E Series accessories with M Series devices To access this KnowledgeBase go to ni com info and enter the info code rdea2m M S...

Page 373: ...truments Application Engineers make sure every question receives an answer For information about other technical support options in your area visit ni com services or contact your local office at ni com contact Training and Certification Visit ni com training for self paced training eLearning virtual classrooms interactive CDs and Certification program information You also can register for instruc...

Page 374: ...m calibration If you searched ni com and could not find the answers you need contact your local office or NI corporate headquarters Phone numbers for our worldwide offices are listed at the front of this manual You also can visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses ...

Page 375: ...Glossary Symbol Prefix Value p pico 10 12 n nano 10 9 μ micro 10 6 m milli 10 3 k kilo 103 M mega 106 Symbols Percent Positive of or plus Negative of or minus Plus or minus Less than Greater than Less than or equal to Greater than or equal to Per º Degree Ω Ohm ...

Page 376: ...that varies smoothly over a continuous range of values rather than in discrete steps analog output signal An output signal that varies smoothly over a continuous range of values rather than in discrete steps analog signal A signal representing a variable that can be observed and represented continuously analog trigger A trigger that occurs at a user selected point on an incoming analog signal Trig...

Page 377: ...a set of specific functions for a specific customer asynchronous 1 Hardware A property of an event that occurs at an arbitrary time without synchronization to a reference clock 2 Software A property of a function that begins an operation and returns prior to the completion or termination of the operation B b Bit One binary digit either 0 or 1 B Byte Eight related bits of data an eight bit binary n...

Page 378: ...g to the next higher counter CE European emissions control standard channel Pin or wire lead to which you apply or from which you read the analog or digital signal Analog signals can be single ended or differential For digital signals you group channels to form ports Ports usually consist of either four or eight digital channels clock Hardware component that controls timing for reading from or wri...

Page 379: ...ate Reciprocal of the interchannel delay count The number of events such as zero crossings pulses or cycles counter 1 Software A memory location used to store a count of certain occurrences 2 Hardware A circuit that counts events When it refers to an instrument it refers to a frequency counter counter timer A circuit that counts external pulses or clock pulses timing D D GND Digital ground signal ...

Page 380: ...s for data transfer are DMA interrupt and programmed I O For programmed I O transfers the CPU in the PC reads data from the DAQ device whenever the CPU receives a software signal to acquire a single data point Interrupt based data transfers occur when the DAQ device sends an interrupt to the CPU telling the CPU to read the acquired data from the DAQ device DMA transfers use a DMA controller instea...

Page 381: ...es according to a prescribed law These values are represented by numbers digital trigger A TTL level signal having two discrete levels A high and a low level DIO Digital input output DMA Direct Memory Access A method by which data can be transferred to from computer memory from to a device or memory on the bus while the processor does something else DMA is the fastest method of transferring data t...

Page 382: ... example an analog input FIFO stores the results of A D conversions until the data can be retrieved into system memory a process that requires the servicing of interrupts and often the programming of the DMA controller This process can take several milliseconds in some cases During this time data accumulates in the FIFO for future retrieval With a larger FIFO longer latencies can be tolerated In t...

Page 383: ...ilt in execution element comparable to an operator function or statement in a conventional language 2 A set of software instructions executed by a single line of code that may have input and or output parameters and returns a value when executed G glitch An unwanted signal excursion of short duration that is usually unavoidable GND See ground ground 1 A pin 2 An electrically neutral wire that has ...

Page 384: ... in LabVIEW instrumentation amplifier A circuit whose output voltage with respect to ground is proportional to the difference between the voltages at its two inputs An instrumentation amplifier normally has high impedance differential inputs and high common mode rejection interchannel delay Amount of time that passes between sampling consecutive channels in an AI scan list The interchannel delay m...

Page 385: ...rchitecture for instrumentation class multichannel data acquisition devices based on the earlier E Series architecture with added new features mass termination USB or DAQPad devices where all signals flow through 68 pin connectors as opposed to screw terminal or BNC variants measurement The quantitative determination of a physical characteristic In practice measurement is the conversion of a physi...

Page 386: ...A characteristic of a DAC in which the analog output always increases as the values of the digital code input to it increase multichannel Pertaining to a radio communication system that operates on more than one channel at the same time The individual channels might contain identical information or they might contain different signals multifunction DAQ See MIO multiplex To assign more than one sig...

Page 387: ...ers or thermocouples NRSE Non Referenced Single Ended mode All measurements are made with respect to a common NRSE measurement system reference but the voltage at this reference can vary with respect to the measurement system ground O offset The unwanted DC voltage due to amplifier offset voltages added to a signal P PCI Peripheral Component Interconnect A high performance expansion bus architectu...

Page 388: ...r source An instrument that provides one or more sources of AC or DC power Also known as power supply ppm Parts per million pretriggering The technique used on a DAQ device to keep a continuous buffer filled with data so that when the trigger conditions are met the sample includes the data leading up to the trigger condition pulse A signal whose amplitude deviates from zero for a short period of t...

Page 389: ...tween which a sensor instrument or device operates with a specified set of characteristics This may be a voltage range or a frequency range real time 1 Displays as it comes in no delays 2 A property of an event or system in which data is processed and acted upon as it is acquired instead of being accumulated and processed at a later time 3 Pertaining to the performance of a computation during the ...

Page 390: ... Signal Conditioning eXtensions for Instrumentation The National Instruments product line for conditioning low level signals within an external chassis near sensors so that only high level signals are sent to DAQ devices in the noisy PC environment sensor A device that responds to a physical stimulus heat light sound pressure motion flow and so on and produces a corresponding electrical signal Pri...

Page 391: ...ific application Operating system functions include the saving of data file system handling of multiple programs at the same time multi tasking network interconnection printing and keyboard user interface interaction software triggering A method of triggering in which you simulate an analog trigger using software Also called conditional retrieval source impedance A parameter of signal sources that...

Page 392: ...mx on the same computer which is not possible with NI DAQ 6 9 x transducer A device that responds to a physical stimulus heat light sound pressure motion flow and so on and produces a corresponding electrical signal See also sensor trigger 1 Any event that causes or starts some form of data capture 2 An external stimulus that initiates one or more instrument functions Trigger stimuli include a fro...

Page 393: ... compatibility with the original USB specification V V Volts Vcm Common mode voltage Vg Ground loop voltage VIH Volts input high VIL Volts input low Vin Volts in Vm Measured voltage VOH Volts output high VOL Volts output low Vout Volts out Vs Signal source voltage virtual channel See channel W waveform 1 The plot of the instantaneous amplitude of a signal as a function of time 2 Multiple voltage r...

Page 394: ...Series D 1 accuracy analog triggers 11 7 acquisitions circular buffered 4 12 digital waveform 6 3 double buffered 4 12 hardware timed 4 11 on demand 4 11 software timed 4 11 AI channels sampling with AI Sample Clock and AI Convert Clock C 2 AI Convert Clock signal 4 31 AI Convert Clock Timebase signal 4 35 AI data acquisition methods 4 11 AI FIFO 4 2 AI Hold Complete Event signal 4 36 AI Pause Tri...

Page 395: ...8 AI Sample Clock Timebase 4 30 AI Start Trigger 4 36 analog output 5 1 circuitry 5 1 connecting signals 5 6 data generation methods 5 4 fundamentals 5 1 getting started with applications in software 5 12 glitches on the output signal 5 4 offset 5 2 reference selection 5 2 timing diagrams B 21 timing signals 5 7 triggering 5 6 troubleshooting C 3 analog output signals 5 7 AO Pause Trigger 5 8 AO S...

Page 396: ...8 pin A 9 PCI PXI 6225 A 32 PCI PXI 6229 A 47 PCI PXI 6255 A 94 PCI 6221 37 pin A 13 USB 6225 Mass Termination A 41 USB 6251 Mass Termination A 83 USB 6255 Mass Termination A 103 USB 6259 Mass Termination A 126 calibration 2 3 calibration certificate NI resources E 2 cascading counters 7 33 Change Detection Event signal 6 8 changing data transfer methods between DMA and IRQ 10 5 between USB signal...

Page 397: ...C pinout A 73 USB 6251 Mass Termination pinout A 81 USB 6251 Screw Terminal pinout A 71 USB 6255 Mass Termination pinout A 101 USB 6255 Screw Terminal pinout A 98 USB 6259 BNC pinout A 116 USB 6259 Mass Termination pinout A 124 USB 6259 Screw Terminal pinout A 113 considerations for field wiring 4 25 for multichannel scanning 4 7 for PXI 10 2 continuous pulse train generation 7 21 controller DMA 1...

Page 398: ... 1 DAQ hardware 2 1 system 2 1 DAQ 6202 2 2 DAQ STC2 2 2 data acquisition methods 4 11 generation methods 5 4 transfer methods 10 4 changing 10 5 DMA 10 4 IRQ 10 4 programmed I O 10 4 USB Signal Stream 10 4 Declaration of Conformity NI resources E 1 default counter terminals 7 30 NI DAQmx counter timer pins 7 30 pins 7 30 detection troubleshooting C 3 device information A 1 multiple synchronizatio...

Page 399: ...ction Event 6 8 connecting 6 9 DI Sample Clock 6 4 DO Sample Clock 6 5 digital source triggering 11 1 digital waveform acquisition 6 3 generation 6 5 disk drive power PCI Express 3 8 disk drive power connector PCI Express devices 3 8 DMA 10 1 as a transfer method 10 4 changing data transfer methods 10 5 controllers 10 1 DO Sample Clock signal 6 5 do SampleClock 6 5 documentation conventions used i...

Page 400: ...ew Terminal A 16 USB 6225 Mass Termination A 44 USB 6225 Screw Terminal A 38 USB 6229 BNC A 60 USB 6229 Screw Terminal A 53 USB 6251 BNC A 80 USB 6251 Mass Termination A 85 USB 6251 Screw Terminal A 72 USB 6255 Mass Termination A 106 USB 6255 Screw Terminal A 100 USB 6259 BNC A 123 USB 6259 Mass Termination A 128 USB 6259 Screw Terminal A 115 fuse replacement USB devices 3 9 G generations analog o...

Page 401: ...nout A 17 USB 6221 Screw Terminal pinout A 15 USB 6225 Mass Termination pinout A 39 USB 6225 Screw Terminal pinout A 36 USB 6229 BNC pinout A 54 USB 6229 Screw Terminal pinout A 51 USB 6251 BNC pinout A 73 USB 6251 Mass Termination pinout A 81 USB 6251 Screw Terminal pinout A 71 USB 6255 Mass Termination pinout A 101 USB 6255 Screw Terminal pinout A 98 USB 6259 BNC pinout A 116 USB 6259 Mass Termi...

Page 402: ... to D 1 Mac OS X xvii Measurement Studio documentation xix measurements buffered period 7 7 buffered pulse width 7 5 buffered semi period 7 8 buffered two signal edge separation 7 18 choosing frequency 7 13 frequency 7 9 period 7 6 position 7 14 pulse width 7 4 semi period 7 8 single period 7 6 single pulse width 7 4 single semi period 7 8 single two signal edge separation 7 18 two signal edge sep...

Page 403: ...s A 141 NI 6289 A 145 accessory options A 147 cabling options A 147 pinout A 145 specifications A 147 NI support and services E 1 NI DAQ documentation xvi device documentation browser xx NI DAQmx default counter terminals 7 30 enabling duplicate count prevention 7 38 NI DAQmx Base documentation xvii NI DAQmx for Linux documentation xvi NI PGIA 4 1 non buffered hardware timed acquisitions 4 12 hard...

Page 404: ... cabling options A 9 pinout A 7 specifications A 9 PCI PXI 6225 accessory options A 32 cabling options A 32 pinout A 30 specifications A 32 PCI PXI 6229 accessory options A 47 cabling options A 47 pinout A 45 specifications A 47 PCI PXI 6255 accessory options A 94 cabling options A 94 pinout A 92 PCI 6220 A 2 PCI 6221 37 pin accessory options A 13 cabling options A 13 pinout A 12 specifications A ...

Page 405: ...1 USB 6255 Mass Termination A 101 USB 6255 Screw Terminal A 98 USB 6259 BNC A 116 USB 6259 Mass Termination A 124 USB 6259 Screw Terminal A 113 pins default 7 30 position measurement 7 14 power 5 V 3 7 connector PCI Express disk drive 3 8 rail D 1 power up states 6 7 8 6 prescaling 7 34 programmable function interface PFI 8 1 power up states 6 7 8 6 programmed I O 10 4 changing data transfer metho...

Page 406: ...related documentation xvi retriggerable single pulse generation 7 21 routing analog comparison event to an output terminal 11 3 clock 9 1 digital 9 1 RSE configuration 4 20 RSE connections using with floating signal sources 4 20 when to use with floating signal sources 4 16 when to use with ground referenced signal sources 4 22 RTSI 9 4 connector pinout 3 12 9 4 filters 9 7 using as outputs 9 6 us...

Page 407: ... Counter n Z 7 28 counters 7 25 DI Sample Clock 6 4 DO Sample Clock 6 5 exporting timing output using PFI terminals 8 3 FREQ OUT 7 30 Frequency Output 7 30 minimizing output glitches C 3 output minimizing glitches on 5 4 simple pulse generation 7 19 single period measurement 7 6 point edge counting 7 2 pulse generation 7 19 retriggerable 7 21 with start trigger 7 20 pulse width measurement 7 4 sem...

Page 408: ...NI DAQmx default counter 7 30 Timebase 100 kHz 9 2 20 MHz 9 2 80 MHz 9 2 timed acquisitions 4 11 timing diagrams AI timing clocks B 5 analog input B 1 analog input internal timing B 5 analog input output timing B 19 analog input pause trigger B 18 analog input reference trigger B 13 analog input sample clock B 15 analog input signal definitions B 2 analog input Start B 10 analog input timing B 4 a...

Page 409: ...source 11 1 with an analog source 11 2 troubleshooting analog input C 1 analog output C 3 counters C 3 installation C 3 NI resources E 1 two signal edge separation measurement 7 17 buffered 7 18 single 7 18 types of analog triggers 11 3 U upgrading from E Series to M Series D 1 USB bulk transfers 10 4 Signal Stream 10 1 USB cable strain relief 1 3 USB Signal Stream 10 1 as a transfer method 10 4 c...

Page 410: ...tions A 83 fuse replacement A 85 LED patterns A 85 pinout A 81 specifications A 83 USB cable strain relief 1 3 USB 6251 Screw Terminal fuse replacement A 72 LED patterns A 72 pinout A 71 signal label 1 2 specifications A 72 USB cable strain relief 1 3 USB 6255 USB cable strain relief 1 3 USB 6255 Mass Termination A 92 accessory options A 103 cabling options A 103 fuse replacement A 106 LED pattern...

Page 411: ... impedance sources 4 8 PFI terminals as static digital I Os 8 3 as timing input signals 8 2 to export timing output signals 8 3 RTSI as outputs 9 6 terminals as timing input signals 9 6 short high quality cabling 4 8 the disk drive power connector PCI Express 3 8 W waveform generation digital 6 5 signals 5 7 triggering 6 3 Web resources E 1 X X1 encoding 7 15 X2 encoding 7 15 X4 encoding 7 15 ...

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