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Appendix C

152

Differential Inputs 

Differential inputs offer the maximum noise rejection at the expense of half your total channel 
count. For the best results, shielded twisted pairs are a must. The shield must connect at one 
end so that ground currents do not travel over the shield. In low-level voltage applications, 
differential inputs reduce problems not only due to electrostatic and magnetic noise, but due 
to cross-talk and thermal errors. 

One problem to consider with differential inputs is the bias current error. The differential 
impedance is usually hundreds of megaohms. With a very small bias current multiplied by 
this high input impedance, the voltage produced is out of the common-mode input range of 
the instrumentation amplifier. 

An external resistor must be provided to return this bias current to the analog common of the 
data acquisition board. This resistor is typically in the order of 1 k

Ω

 to 100 k

Ω

 from the input 

low side to analog common. Alternatively, the external common can be returned through a 10 

Ω

 to 100 k

Ω

 resistor to analog common (it cannot be 0 

Ω

 due to ground currents). 

Содержание DT300 Series

Страница 1: ...DT300 Series UM 16501 T User s Manual Title Page ...

Страница 2: ...ghts of Data Translation Inc Use duplication or disclosure by the United States Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer software clause at 48 C F R 252 227 7013 or in subparagraph c 2 of the Commercial Computer Software Registered Rights clause at 48 C F R 52 227 19 as applicable Data Translation Inc 100 Locke Drive Mar...

Страница 3: ...ions to this equipment not expressly approved by Data Translation could void your authority to operate the equipment under Part 15 of the FCC Rules Note This product was verified to meet FCC requirements under test conditions that included use of shielded cables and connectors between system components It is important that you use shielded cables and connectors to reduce the possibility of causing...

Страница 4: ......

Страница 5: ...and Configuring a Screw Terminal Panel Backplane 31 Using an STP300 Screw Terminal Panel 33 Attaching an STP300 Screw Terminal Panel 33 Configuring an STP300 Screw Terminal Panel 33 Configuring Jumpers on the STP300 34 Configuring Jumper W1 Common Ground Sense 35 Configuring Jumpers W4 to W7 Analog Outputs on a 5B01 or 7BP16 1 Backplane 35 Configuring Resistors on the STP300 36 Configuring Resisto...

Страница 6: ...surement Signals 55 Connecting Pulse Output Signals 56 Chapter 5 Verifying the Operation of a DT300 Series Board 59 Running the Quick DataAcq Application 61 Testing Single Value Analog Input 62 Testing Single Value Analog Output 63 Testing Continuous Analog Input 64 Testing Single Value Digital Input 65 Testing Single Value Digital Output 66 Testing Frequency Measurement 67 Testing Pulse Output 68...

Страница 7: ...6 Data Transfer 87 Error Conditions 87 Analog Output Features 89 Output Resolution 89 Analog Output Channels 89 Output Ranges and Gains 89 Conversion Modes 90 Data Format 90 Digital I O Features 92 Digital I O Lines 92 Digital I O Resolution 92 Digital I O Operation Modes 93 Counter Timer Features 94 Counter Timer Channels 94 C T Clock Sources 95 Internal C T Clock 95 External C T Clock 95 Interna...

Страница 8: ...ference 120 Using the Auto Calibration Procedure 120 Using the Manual Calibration Procedure 121 Calibrating the Analog Output Subsystem 123 Configuring for an External Meter 123 Using the Calibration Procedure 123 Chapter 9 Troubleshooting 125 General Checklist 126 Technical Support 128 If Your Board Needs Factory Service 129 Appendix A Specifications 131 Analog Input Specifications 132 Analog Out...

Страница 9: ...crew Terminal Assignments for Connector J2 on the STP300 146 Screw Terminal Assignments for the STP68 and STP68 DIN 147 Appendix C Using Your Own Screw Terminal Panel 149 Analog Inputs 151 Single Ended Inputs 151 Pseudo Differential Inputs 151 Differential Inputs 152 Analog Outputs 153 Digital Inputs and Counter Timer Inputs 154 Digital Outputs 155 Index 157 ...

Страница 10: ...Contents 10 ...

Страница 11: ...e documentation for that software for more information Intended Audience This document is intended for engineers scientists technicians or others responsible for using and or programming the DT300 Series boards for data acquisition operations in Microsoft Windows XP Windows Vista or Windows 7 It is assumed that you have some familiarity with data acquisition principles and that you understand your...

Страница 12: ...in this Manual The following conventions are used in this manual Notes provide useful information or information that requires special emphasis cautions provide information to help you avoid losing data or damaging your equipment and warnings provide information to help you avoid catastrophic damage to yourself or your equipment Items that you select or type are shown in bold Related Information R...

Страница 13: ...capabilities of Data Translation data acquisition devices PCI Specification PCI Local Bus Specification PCI Special Interest Group Portland OR Revision 2 1 June 1 1995 Windows XP Windows Vista or Windows 7 documentation Where To Get Help Should you run into problems installing or using a DT300 Series board our Technical Support Department is available to provide technical assistance Refer to Chapt...

Страница 14: ...About this Manual 14 ...

Страница 15: ...15 1 Overview Features 16 Supported Software 18 Accessories 19 Getting Started Procedure 20 ...

Страница 16: ...e Internal and external clock sources for the analog input subsystem Digital TTL triggering for the analog input subsystem Software calibration of the analog I O circuitry Two 8 bit digital ports programmable as inputs or outputs on a per port basis digital input lines from these lines can be included as part of the analog input channel gain list to correlate the timing of analog and digital event...

Страница 17: ...asurement rate generation continuous pulse output one shot pulse output and repetitive one shot pulse output Programmable gate types Programmable pulse output polarities output types and duty cycles For a discussion of these features in detail refer to Chapter 6 starting on page 71 ...

Страница 18: ...tion builder designed to give you top performance with ease of use development Order the full development version of this software package to develop your own application using real hardware DT Open Layers for NET Class Library Use this class library if you want to use Visual C or Visual Basic for NET to develop your own application software for the DT300 Series boards using Visual Studio 2003 or ...

Страница 19: ... the 5B series backplanes and modules with the STP300 you need the following additional accessories available from Data Translation AC1315 cable A 2 foot cable with a 26 pin connector on each end that connects a 5B Series signal conditioning backplane to connector J2 on the STP300 screw terminal panel PWR 977 power supply A 5 V 3 A power supply for powering the 5B Series backplanes 7BP16 1 7BP08 1...

Страница 20: ... in the diagram shows you where you are in the getting started procedure Figure 1 Getting Started Flow Diagram Install the Board and Load the Device Driver see Chapter 2 starting on page 23 Wire Signals see Chapter 4 starting on page 41 Verify the Operation of the Board see Chapter 5 starting on page 59 Attach and Configure the Screw Terminal Panel and Signal Conditioning Backplane see Chapter 3 s...

Страница 21: ...Part 1 Getting Started ...

Страница 22: ......

Страница 23: ...23 2 Installing the Board and Loading the Device Driver Unpacking 25 Setting up the Computer 26 Setting up an Expansion Slot 27 Loading the Device Driver 29 ...

Страница 24: ...de later to recalibrate it refer to Chapter 8 starting on page 117 for instructions Install the Board and Load the Device Driver this chapter Wire Signals see Chapter 4 starting on page 41 Verify the Operation of the Board see Chapter 5 starting on page 59 Attach and Configure the Screw Terminal Panel and Signal Conditioning Backplane see Chapter 3 starting on page 31 ...

Страница 25: ...ation If you are in the United States call the Customer Service Department at 508 481 3700 ext 1323 An application engineer will guide you through the appropriate steps for replacing missing or damaged items If you are located outside the United States call your local distributor listed on Data Translation s web site www datatranslation com CAUTION Keep the board in its protective antistatic bag u...

Страница 26: ...lling the board in the computer 2 Turn off the computer 3 Turn off all peripherals printer modem monitor and so on connected to the computer 4 Unplug the computer and all peripherals 5 Remove the cover from you computer Refer to your computer s user manual for instructions CAUTION To prevent electrostatic damage that can occur when handling electronic equipment use a ground strap or similar device...

Страница 27: ...han ISA or EISA slots and are usually white or ivory Commonly three PCI slots one of which may be a shared ISA PCI slot are available If an ISA board exists in the shared slot you cannot use the slot for a PCI board if a PCI board exists in the shared slot you cannot use the slot for an ISA board 2 Remove the cover plate from the selected expansion slot Retain the screw that held it in place you w...

Страница 28: ...s shown in Figure 2 Figure 2 Inserting the DT300 Series Board in the Computer 5 Carefully lower the board into the PCI expansion slot using the card guide to properly align the board in the slot 6 When the bottom of the board contacts the bus connector gently press down on the board until it clicks into place 7 Secure the board in place at the rear panel of the system unit using the screw removed ...

Страница 29: ...ntrol Panel 9 Double click the Open Layers Control Panel icon 10 Select the DT300 Series board to configure and then click Advanced By default the prompt Handles Overloaded Bus is checked 11 If you are using an Optiplex computer or experience timing problems with your DT300 Series board uncheck this box 12 When you are finished click Close Once the driver is loaded perform the steps in Chapter 3 s...

Страница 30: ...l conditioning backplane Windows 7 Once you have installed the software from the Data Acquisition OMNI CD installed a DT300 Series board and powered up the host computer the hardware is found automatically Perform the following steps to configure the device driver 1 Open the Control Panel 2 Double click the Open Layers Control Panel icon 3 Select the DT300 Series board to configure and then click ...

Страница 31: ...Attaching and Configuring a Screw Terminal Panel Backplane Using an STP300 Screw Terminal Panel 33 Using an STP68 or STP68 DIN Screw Terminal Panel 37 Using 5B and 7B Series Signal Conditioning Backplanes 38 ...

Страница 32: ...stall the Board and Load the Device Driver see page 23 Wire Signals see page 41 Verify the Operation of the Board see page 59 Attach and Configure a Screw Terminal Panel and Signal Conditioning Backplane this chapter ...

Страница 33: ...ranslation as accessories to the DT300 Series boards Connector J1 on the STP300 attaches to connector J1 on the DT300 Series board Connector J2 on the STP300 connects to a 5B or 7B Series signal conditioning backplane Figure 3 illustrates how to attach the STP300 screw terminal panel to a DT300 Series board Figure 3 Attaching the STP300 Screw Terminal Panel to a DT300 Series Board Once you have at...

Страница 34: ...16 1 signal conditioning backplanes The following subsections describe how to configure these jumpers Note The screw terminal panels are shipped with enough jumper plugs to select every possible configuration Spare jumper plugs are stored on the panel itself on the posts marked spare Save these jumper plugs for future use J1 68 Pin Connector 32 25 33 40 41 48 49 57 65 56 64 72 Counter Timers Count...

Страница 35: ...g output modules on the 5B08 7BP08 1 or 7BP04 1 backplane Use jumpers W4 to W7 if you are using the STP300 screw terminal panel with analog output modules on the 5B01 or 7BP16 1 signal conditioning backplane Install jumpers W4 and W5 to connect DAC0 from the DT300 Series board to channel 14 on the 5B01 or 7BP16 1 backplane Jumper W4 connects DAC0 to channel 14 jumper W5 connects DAC0 s return Inst...

Страница 36: ...s and then to analog ground Typical resistor values are 1 kΩto 100 kΩdepending on the application Refer to page 49 for an example of using bias return resistors with differential inputs Configuring Resistors R9 to R16 Current Shunt Resistor locations R9 to R16 are typically used to convert current to voltage on channels 0 to 7 where R9 corresponds to analog input channel 0 and R16 corresponds to a...

Страница 37: ...Translation as accessories to the DT300 Series boards Connector J1 on the STP68 and STP68 DIN attaches to connector J1 on the DT300 Series board Figure 5 illustrates how to attach the STP68 or STP68 DIN screw terminal panel to a DT300 Series board Figure 5 Attaching the STP68 or STP68 DIN Screw Terminal Panel to a DT330 Series Board The STP68 and STP68 DIN screw terminal panels do not require conf...

Страница 38: ...f the STP300 screw terminal panel as shown in Figure 6 2 Plug the other end of the AC1315 cable into the 26 pin connector on the 5B01 or 5B08 backplane 3 Connect power supply PWR 977 to the 5 V and power ground screw terminals on the 5B Series backplane and to the wall outlet Figure 6 Connecting the 5B01 or 5B08 Backplane to the STP300 Attaching a 7B Series Backplane To connect a 7B Series signal ...

Страница 39: ...g input signal to the module on the signal conditioning backplane For channels that do not use signal conditioning connect the analog input signals to the STP300 screw terminal panel By default the 5B01 and 7BP16 1 backplanes map to single ended analog input channels 0 to 15 However by configuring jumpers W4 to W7 on the STP300 as described on page 35 you can use channels 14 and 15 on the 5B01 or ...

Страница 40: ...0 Connect all unused inputs to analog common Reading an open channel can cause settling problems on the next valid channel Refer to the user s manuals and data sheets for the 5B and 7B Series for more information ...

Страница 41: ...41 4 Wiring Signals Before Wiring 43 Connecting Analog Input Signals 47 Connecting Analog Output Signals 51 Connecting Digital I O Signals 52 Connecting Counter Timer Signals 53 ...

Страница 42: ... module refer to the 5B and 7B Series data sheets and user s manuals Install the Board and Load the Device Driver see Chapter 2 starting on page 23 Wire Signals this chapter Verify the Operation of the Board see Chapter 5 starting on page 59 Attach and Configure a Screw Terminal Panel and Signal Conditioning Backplane see Chapter 3 starting on page 31 ...

Страница 43: ... a known voltage source to analog input channel 0 use the differential configuration Wire an oscilloscope or voltage meter to analog output channel 0 Wire a digital input to digital I O Port A Wire a external clock or scope to counter timer channel 0 If you have not done so already install the DT300 Series software Run the Quick DataAcq application described in page 59 to verify that the board is ...

Страница 44: ...Analog Input 0 Return R1 3 34 Analog Input 1 R10 4 33 Analog Input 9 Analog Input 1 Return R2 5 66 Analog Input 2 R11 6 65 Analog Input 10 Analog Input 2 Return R3 7 32 Analog Input 3 R12 8 31 Analog Input 11 Analog Input 3 Return R4 9 64 Analog Input 4 R13 10 63 Analog Input 12 Analog Input 4 Return R5 11 30 Analog Input 5 R14 12 29 Analog Input 13 Analog Input 5 Return R6 13 62 Analog Input 6 R1...

Страница 45: ...able 4 Counter Timer and Digital I O Screw Terminal Assignments on the STP300 TB J1 Pin Description TB J1 Pin Description 25 42 Digital Ground 50 16 Digital I O Port A Line 1 26 41 User Clock Input 0 51 49 Digital I O Port A Line 2 27 40 User Counter Output 0 52 15 Digital I O Port A Line 3 28 39 External Gate 0 53 48 Digital I O Port A Line 4 29 8 Digital Ground 54 14 Digital I O Port A Line 5 30...

Страница 46: ...igital I O Port C Line 0 41 1 5 V Output 1A 66 20 Digital I O Port C Line 1 42 35 Power Ground 67 53 Digital I O Port C Line 2 43 44 45 55 Digital Ground 68 19 Digital I O Port C Line 3 46 56 External A D Trigger 69 52 Digital I O Port C Line 4 47 21 Digital Ground 70 18 Digital I O Port C Line 5 48 22 External A D Sample Clock Input 71 51 Digital I O Port C Line 6 49 50 Digital I O Port A Line 0 ...

Страница 47: ...ounds of other signals exists and the differential configuration is not suitable for your application This option provides less noise rejection than the differential configuration however all 16 analog input channels are available Differential Choose this configuration when you want to measure low level signals less than 1 V when you are using an A D converter with high resolution 12 bits when noi...

Страница 48: ...s Shown for Channels 0 1 and 8 STP300 Panel Signal Source Vsource 0 TB1 TB3 TB17 Analog In 0 Analog In 1 TB2 Jumper W1 Installed Amp Low W1 TB18 Analog In 8 Analog Ground Vsource 8 Vsource 1 STP300 Panel Signal Source TB1 TB3 TB17 Analog In 0 Analog In 1 VCM Remove Jumper W1 to use Amp Low as a remote ground sense TB18 Analog Ground Make this connection as close to VIN sources as possible to reduc...

Страница 49: ...MΩ However when you add noise from external sources to the high impedance a resistor value of 100 Ωto 100 kΩis more practical In Figure 10B the signal source itself provides the bias return path therefore you do not need to use bias return resistors Rs is the signal source resistance while Rv is the resistance required to balance the bridge Note that the negative side of the bridge supply must be ...

Страница 50: ...puts from a Grounded Signal Source Shown for Channel 0 Connecting Current Loop Inputs Figure 12 shows how to connect a current loop input channel 0 in this case to the STP300 screw terminal panel Figure 12 Connecting Current Inputs Shown for Channel 0 TB18 Grounded Signal Source TB1 TB2 Analog In 0 Analog In 0 Return Es Signal Source Ground Vg1 STP300 Panel Resistor R1 should be installed for bias...

Страница 51: ... Shown for Channel 0 If you do not connect the Analog Output Reference to TB21 the board provides an internal 10 V reference as shown in Figure 14 Figure 14 Connecting Analog Output Voltages Using the Board s Internal 10 V Reference Shown for Channel 0 STP300 Panel TB19 Analog Output 0 Analog Output 0 Reference TB20 Load Analog Output 0 Return TB21 VRef 10 V 10 V STP300 Panel TB19 Analog Output 0 ...

Страница 52: ...own for Channels 0 and 1 Port A Figure 16 shows how to connect a digital output signal line 0 of digital Port B in this case to the STP300 screw terminal panel Figure 16 Connecting Digital Outputs Shown for Channel 0 Port B TB43 Digital I O Port A Line 0 STP300 Panel TB49 TB50 Digital I O Port A Line 1 Digital Ground TTL Inputs TB43 Digital I O Port B Line 0 STP300 Panel TB57 Digital Ground 500 Ω ...

Страница 53: ...s Figure 17 shows one example of connecting event counting signals to the STP300 screw terminal panel using user counter 0 In this example rising clock edges are counted while the gate is active Figure 17 Connecting Event Counting Signals Shown for Clock Input 0 and External Gate 0 Figure 18 shows another example of connecting event counting signals to the STP300 screw terminal panel using user co...

Страница 54: ... do not need to make the external cascading connections Note also that this example shows the use of an external gate however this is connection is not required Figure 19 Cascading Counters Shown for Event Counting Using Counters 0 and 1 and External Gate 0 STP300 Panel TB26 Signal Source TB25 Digital Ground User Clock Input 0 STP300 Panel TB26 Signal Source Digital Ground TB29 TB28 Digital Ground...

Страница 55: ...e frequency of the clock input is the number of counts divided by the duration of the Windows timer If you need more accuracy than the Windows timer provides you can connect a pulse of a known duration such as a one shot output of another user counter to the external gate input as shown in Figure 20 In this configuration the frequency of the clock input is the number of counts divided by the perio...

Страница 56: ...an example of how to externally cascade two counters to perform a rate generation operation using user counters 0 and 1 Note that you can also cascade counters internally using software if you internally cascade the counters you do not need to make the external cascading connections In this example counter 1 gate is logic high STP300 Panel TB27 Heater Controller Digital Ground TB29 TB28 Digital Gr...

Страница 57: ...ters you do not need to make the external cascading connections In this example counter 0 gate is logic high Figure 23 Cascading Counters Shown for One Shot Using Counters 0 and 1 and External Gate 1 STP300 Panel TB26 Signal Source Digital Ground TB29 TB28 Digital Ground Gate 0 External Gating Switch TB27 TB30 User Counter Output 0 User Clock Input 1 TB25 User Clock Input 0 STP300 Panel TB26 Signa...

Страница 58: ...Chapter 4 58 ...

Страница 59: ...ck DataAcq Application 61 Testing Single Value Analog Input 62 Testing Single Value Analog Output 63 Testing Continuous Analog Input 64 Testing Single Value Digital Input 65 Testing Single Value Digital Output 66 Testing Frequency Measurement 67 Testing Pulse Output 68 ...

Страница 60: ...iew Measure the frequency of events Output data from a single analog output channel or digital output port Output pulses either continuously or as a one shot Save the input data to disk This chapter describes how to install and run the Quick DataAcq application Install the Board and Load the Device Driver see Chapter 2 starting on page 23 Wire Signals see Chapter 4 starting on page 41 Verify the O...

Страница 61: ...Browse to Programs Data Translation Inc DT Open Layers for Win32 QuickDataAcq The main menu appears Note The Quick DataAcq application allows you to verify basic operations on the board however it may not support all of the board s features For information on each of the features provided use the online help for the Quick DataAcq application by pressing F1 from any view or selecting the Help menu ...

Страница 62: ... connect a differential analog input 2 In the Quick DataAcq application choose Single Analog Input from the Acquisition menu 3 Select the appropriate DT300 Series board from the Board list box 4 In the Channel list box select analog input channel 0 5 In the Range list box select the range for the channel The default is 10 V 6 Select Differential 7 Click Get to acquire a single value from analog in...

Страница 63: ...2 In the Quick DataAcq application choose Single Analog Output from the Control menu 3 Select the appropriate DT300 Series board from the Board list box 4 In the Channel list box select analog output channel 0 5 In the Range list box select the output range of DAC0 The default is 10 V 6 Enter an output value or use the slider to select a value to output from DAC0 7 Click Send to output a single va...

Страница 64: ...ded to the channel list 6 From the Config menu choose ChannelType and then select Differential 7 From the Config menu select Range and then select Bipolar or Unipolar depending on the configuration of your board The default is Bipolar 8 From the Scope view double click the input range of the channel to change the input range of the board 10 V 5 V 2 5 V 1 25 V for bipolar ranges or 0 to 10 V 0 to 5...

Страница 65: ...t A on the DT300 Series board Refer to page 52 for an example of how to connect a digital input 2 In the Quick DataAcq application choose Digital Input from the Acquisition menu 3 Select the appropriate DT300 Series board from the Board list box 4 Select digital input port A by clicking Port A 5 Click Get The application displays the value of each digital input line in port A on the screen in both...

Страница 66: ...menu 3 Select the appropriate DT300 Series board from the Board list box 4 Select digital output port B by clicking Port B 5 Click the appropriate bits to select the digital output lines to write to If the bit is selected a high level signal is output to the digital output line if the bit is not selected a low level signal is output to the digital output line Optionally you can enter an output val...

Страница 67: ... application works only with counter timer 0 2 In the Quick DataAcq application choose Frequency Counter from the Acquisition menu 3 Select the appropriate DT300 Series board from the Board list box 4 In the Count Duration text box enter the number of seconds during which events will be counted 5 Click Start to start the frequency measurement operation The operation automatically stops after the n...

Страница 68: ...tinuous to output a continuous pulse stream or One Shot to output one pulse 5 Select either Low to high to output a rising edge pulse the high portion of the total pulse output period is the active portion of the signal or High to low to output a falling edge pulse the low portion of the total pulse output period is the active portion of the signal 6 Enter a percentage or use the slider to select ...

Страница 69: ...Part 2 Using Your Board ...

Страница 70: ......

Страница 71: ...71 6 Principles of Operation Analog Input Features 73 Analog Output Features 89 Digital I O Features 92 Counter Timer Features 94 ...

Страница 72: ...rig 20 MHz Clock A D Clk Analog In 16 Channel Mux Ch Sel Gain Amp 1 2 4 8 ADC Tristate 1 kSample Input FIFO PCI Bus Interface PCI Bus Gain Sel A D Clk DIO Ports A and B Input Sel Ch Sel 1 K Entry CGL FIFO CGL Reg Channel Parameter Reg Gain Sel Input Sel Bidirectional 8 bit Latch Bidirectional 8 bit Latch 20 MHz Clock DIO Port B 7 0 DIO Port A 7 0 User Clk 3 0 User Gate 3 0 User Out 3 0 4 User Coun...

Страница 73: ...d for each board type therefore it cannot be programmed in software Analog Input Channels The DT300 Series board supports 16 single ended or pseudo differential analog input channels or 8 differential analog input channels on board Refer to Chapter 4 starting on page 41 for a description of how to wire these signals You configure the channel type through software Note For pseudo differential input...

Страница 74: ...ries in the channel list The channels are read in order using continuous paced mode or triggered scan mode from the first entry to the last entry in the channel list You can read the channels in the channel list up to 256 times per trigger for a total of 262 144 samples per trigger using triggered scan mode Refer to page 77 for more information on the supported conversion modes If you wish you can...

Страница 75: ...ogrammable per channel Table 6 lists the effective ranges supported by the DT300 Series board using these gains For each channel choose the gain that has the smallest effective range that includes the signal you want to measure For example if the range of your analog input signal is 1 5 V specify a range of 10 V to 10 V for the board and use a gain of 4 for the channel the effective input range fo...

Страница 76: ...channel in the channel list this clock is also called the A D pacer clock Note If you enter digital I O channel 16 in the channel list the A D sample clock internal or external also paces the acquisition of the 16 digital input lines The following subsections describe the internal and external A D sample clocks in more detail Internal A D Sample Clock The internal A D sample clock uses a 20 MHz ti...

Страница 77: ...quency is always equal to the frequency of the external A D sample clock input signal that you connect to the board through the screw terminal panel Analog Input Conversion Modes DT300 Series boards support the following conversion modes Single value operations are the simplest to use but offer the least flexibility and efficiency Using software you can specify the range gain and analog input chan...

Страница 78: ... divided by the number of entries in the channel list To select continuously paced scan mode use software to specify the dataflow as continuous continuous pre trigger or continuous about trigger sometimes called continuous pre post trigger The initial trigger source depends on the trigger acquisition mode you use Refer to page 80 for more information on the supported trigger sources and trigger ac...

Страница 79: ...uency Max Retrigger 1 Frequency Min Retrigger Period For example if you are using 16 channels in the channel list CGL scanning the channel list 256 times every trigger or retrigger and using an A D sample clock with a frequency of 100 kHz set the maximum retrigger frequency to 24 41 Hz since 24 41 Hz 1 16 256 2 μs 100 kHz To select software retriggered scan mode use software to specify the followi...

Страница 80: ...e information on buffers The conversion rate of each channel is determined by the frequency of the A D sample clock refer to page 76 for more information on the A D sample clock The conversion rate of each scan is determined by the period between external retriggers therefore it cannot be accurately controlled The board ignores external triggers that occur while it is acquiring data Only external ...

Страница 81: ...es Refer to page 77 for more information on the supported conversion modes refer to page 80 for information on the supported trigger sources Post trigger acquisition starts when the board detects the post trigger event and stops when the specified number of post trigger samples has been acquired or when you stop the operation If you are using triggered scan mode the board continues to acquire post...

Страница 82: ...sing software specify The dataflow as ContinuousPreTrigger The pre trigger source as the software trigger The post trigger source as the external positive digital TTL trigger The retrigger mode as the software retrigger if you are using triggered scan mode Refer to page 77 for more information on the supported conversion modes refer to page 80 for information on the supported trigger sources Note ...

Страница 83: ...Trigger Mode Figure 28 illustrates the same example using software retriggered scan mode The multiscan count is 2 indicating that the channel list will be scanned twice per trigger or retrigger In this example pre trigger analog input data is acquired on each clock pulse of the A D sample clock until the channel list has been scanned twice then the board waits for the software retrigger event When...

Страница 84: ...etects the selected post trigger event the board stops acquiring pre trigger data and starts acquiring post trigger data If you are using software retriggered scan mode and the post trigger event has not occurred the board continues to acquire pre trigger data using the software retrigger clock to clock the operation If however the post trigger event has occurred the board continues to acquire pos...

Страница 85: ...er of times acquiring the data as post trigger samples On all subsequent software retriggers post trigger data is acquired Figure 30 Continuous About Trigger Mode with Triggered Scan Pre trigger event occurs Chan 0 Chan 1 Chan 0 A D Sample Clock Post trigger event Pre trigger data acquired Post trigger data acquired Chan 1 Chan 0 Chan 1 Chan 0 Chan 1 Chan 0 Chan 1 Chan 0 Chan 1 Pre trigger event o...

Страница 86: ...epresent the voltage Offset is the actual minus full scale value Theoretically the minus full scale value is 0 0 V for the unipolar input range and 10 V for the bipolar input range However the actual minus full scale value may be slightly different than these values such as 0 01 V and or 9 99 V For greatest accuracy use the actual minus full scale value when converting codes to voltage For example...

Страница 87: ...erred to the host computer Using PCI bus mastering the board transfers the analog input data to a 256 KB circular buffer in the host computer this buffer is dedicated to the hardware The board treats each buffer as two consecutive 128 KB blocks of memory Note When you stop an analog input operation a final block of two samples is transferred even if only one sample is required The host software ig...

Страница 88: ...educe the sampling rate Host Block Overflow Indicates that the host computer is not handling data from the board fast enough This error is reported if the board completes the transfer of a block of input data to the circular buffer in the host computer before the host computer has finished reading the last block of data The host computer can clear this error To avoid this error ensure that you all...

Страница 89: ... wire analog output signals to the board using the screw terminal panel You configure the channel type as differential through software Within each DAC the digital data is double buffered to prevent spurious outputs then output as an analog signal Both DACs power up to a value of 0 V 10 mV Resetting the board does not clear the values in the DACs The DT300 Series board can output data from a singl...

Страница 90: ...he following formulas LSB FSR 2N Code Vout offset LSB where LSB is the least significant bit FSR is the full scale range For the DT300 Series the full scale analog output range is 5 for the unipolar range of 0 to 5 V 10 for the unipolar range of 0 to 10 V or the bipolar output range of 5 V or 20 for the bipolar range or 10 V N is the number of bits of the D A converter For the DT302 and DT304 boar...

Страница 91: ...hat you are using a DT322 board with a bipolar output range of 10 V The minus full scale value is 10 V If you want to output a voltage of 4 7 V determine the code value as follows LSB 20 0 000305 V 65536 Code 4 7 V 10 V 0 000305 V Code 48196 BC44h ...

Страница 92: ...om Ports A and B as a channel in the analog input channel list refer to page 74 for more information By default the digital I O lines power up as digital inputs On power up or reset no digital data is output from the board Digital I O Resolution For Ports A and B you can specify the number of lines to read or write by specifying the resolution in software If you specify a resolution of 8 element 0...

Страница 93: ...ot specify a clock or trigger source Single value operations stop automatically when finished you cannot stop a single value operation Continuous digital input takes full advantage of the capabilities of the DT300 Series board In this mode enter all 16 digital input lines of Ports A and B as channel 16 of the analog input channel list program this mode through the A D subsystem Using this mode you...

Страница 94: ...nd outputs a clock output signal also called a pulse output signal as shown in Figure 31 Figure 31 Counter Timer Channel Each counter corresponds to a counter timer C T subsystem To specify the counter to use in software specify the appropriate C T subsystem For example counter 0 corresponds to C T subsystem element 0 counter 3 corresponds to C T subsystem element 3 Using software you can internal...

Страница 95: ...ates not available with the internal C T clock or if you want to pace at uneven intervals The rising edge of the external C T clock input signal is the active edge Using software specify the clock source as external and the clock divider used to determine the frequency at which to pace the operation this is the frequency of the clock output signal The minimum clock divider that you can specify is ...

Страница 96: ... measurement and rate generation refer to page 97 for more information on these modes Logic high level external gate input Enables a counter timer operation when the external gate signal is high and disables a counter timer operation when the external gate signal is low Note that this gate type is used only for event counting frequency measurement and rate generation refer to page 97 for more info...

Страница 97: ...total pulse output period is the active portion of the counter timer clock output signal Low to high transitions The high portion of the total pulse output period is the active portion of the counter timer pulse output signal Using software you can specify the duty cycle of the pulse The duty cycle or pulse width indicates the percentage of the total pulse output period that is active A duty cycle...

Страница 98: ...age 95 for more information on the external C T clock source Using software specify the counter timer mode as event counting count the clock source as external and the gate type that enables the operation Refer to page 96 for more information on gate types Ensure that the signals are wired appropriately Figure 33 shows one example of connecting an event counting application to the STP300 screw ter...

Страница 99: ...nformation on the external C T clock source One way to perform a frequency measurement is to use the same wiring as an event counting application that does not use an external gate signal as shown in Figure 35 Figure 35 Connecting Frequency Measurement Signals without an External Gate Input Shown for Clock Input 0 Gate Input Signal 0 low level enables operation high level disables operation Extern...

Страница 100: ... the counter timers for one shot mode specifying the clock source clock frequency gate type and type of output pulse high or low 2 Set up the counter timer that will measure the frequency for event counting mode specifying the clock source to count and the gate type this should match the pulse output type of the counter timer set up for one shot mode 3 Start both counters events are not counted un...

Страница 101: ...rnal clock divider If you are using one counter not cascaded you can output pulses using a maximum frequency of 10 MHz In rate generation mode either the internal or external C T clock input source is appropriate depending on your application refer to page 95 for more information on the C T clock source Using software specify the counter timer mode as rate generation rate the C T clock source as e...

Страница 102: ...ulse type and a duty cycle of 75 The gate type does not matter for this example A 1 kHz square wave is the generated output Figure 40 shows the same example using a duty cycle of 25 Figure 39 Example of Rate Generation Mode with a 75 Duty Cycle STP300 Panel TB27 Heater Controller Digital Ground TB29 TB26 Digital Ground TB25 User Counter Output 0 Signal Source User Counter Input 0 Pulse Output Sign...

Страница 103: ...pulse is determined by the clock input signal Refer to page 95 for more information on the C T clock sources Using software specify the counter timer mode as one shot the clock source the polarity of the output pulse high to low transition or low to high transition and the gate type to trigger the operation Refer to page 97 for more information on pulse output types Refer to page 96 for more infor...

Страница 104: ...l gate input rising edge a clock output frequency of 1 kHz pulse period of 1 ms and a low to high pulse type Figure 42 Example of One Shot Mode STP300 Panel TB27 Heater Controller Digital Ground TB29 TB28 Digital Ground Gate 0 External Gating Switch TB25 User Counter Output 0 Pulse Output Signal External Gate Signal 100 duty cycle One Shot Operation Starts 1 ms period ...

Страница 105: ...ecify the counter timer mode as repetitive one shot the clock source as internal the polarity of the output pulses high to low transitions or low to high transitions and the gate type to trigger the operation Refer to page 97 for more information on pulse output types refer to page 96 for more information on gate types Note In the case of a one shot operation the pulse width is automatically set t...

Страница 106: ...Chapter 6 106 ...

Страница 107: ...r Capabilities Data Flow and Operation Options 109 Buffering 110 Triggered Scan Mode 110 Gain 111 Channels 111 Ranges 112 Resolution 112 Thermocouple and RTD Support 113 IEPE Support 113 Triggers 114 Clocks 115 Counter Timers 116 ...

Страница 108: ...subsystem types The first column in each table lists all possible subsystem capabilities A description of each capability is followed by the property used to describe that capability in the DT Open Layers for NET Class Library Note Blank fields represent unsupported options For more information refer to the description of these properties in the DT Open Layers for NET Class Library online help or ...

Страница 109: ... is incapable of continuous operation you can perform a continuous DIN operation by specifying channel 16 in the channel gain list of the A D subsystem and starting the A D subsystem Yes Continuous Operation until Trigger SupportsContinuousPreTrigger Yes Continuous Operation before after Trigger SupportsContinuousPrePostTrigger Yes Waveform Operations Using FIFO Only SupportsWaveformModeOnly Simul...

Страница 110: ...z or 165 kHzb b The maximum retrigger frequency depends on the board type For DT301 and DT302 boards the maximum retrigger frequency is 155 kHz For DT303 and DT304 boards the maximum retrigger frequency is 219 kHz For DT321 and DT322 boards the maximum retrigger frequency is 165 kHz The maximum retrigger frequency is based on the number of samples per trigger as follows Min Retrigger of CGL entrie...

Страница 111: ... DI Channels MaxDifferentialChannels 8 2 1 1 1 0 Maximum Channel Gain List Depth CGLDepth 1024 1 0b b All 16 bits of the DIO lines from Ports A and B are assigned to A D input channel 16 While the DIN subsystem itself is incapable of continuous operation you can perform a continuous DIN operation by specifying channel 16 in the channel gain list of the A D subsystem and starting the A D subsystem ...

Страница 112: ...T300 Series Resolution Options DT300 Series A D D A DIN DOUT C T QUAD Software Programmable Resolution SupportsSoftwareResolution Yesa a When configured for 16 bits of resolution both element 0 and element 1 use DIO bits 15 to 0 Ports A and B are combined however you cannot use both elements at the same time When configured for 8 bits of resolution element 0 uses bits 7 to 0 Port A and element 1 u...

Страница 113: ...Channel SupportsCjcSourceChannel Available CJC Channels CjcChannel Supports Interleaved CJC Values in Data Stream SupportsInterleavedCjcTemperaturesInStream Supports Programmable Filters SupportsTemperatureFilters Programmable Filter Types TemperatureFilterType Table 20 DT300 Series IEPE Support Options DT300 Series A D D A DIN DOUT C T QUAD Software Programmable AC Coupling SupportsACCoupling Sof...

Страница 114: ...ternal Negative TTL Trigger Support SupportsNegExternalTTLTrigger Yes External Positive TTL Trigger Support for Single Value Operations SupportsSvPosExternalTTLTrigger External Negative TTL Trigger Support for Single Value Operations SupportsSvNegExternalTTLTrigger Positive Threshold Trigger Support SupportsPosThresholdTrigger Negative Threshold Trigger Support SupportsNegThresholdTrigger Digital ...

Страница 115: ...Frequency MaxFrequency 3 MHza a For DT301 and DT302 boards the maximum throughput for analog input channels is 225 kHz for DT303 and DT304 boards the maximum throughput for analog input channels is 400 kHz for DT321 and DT322 boards the maximum throughput for analog input channels is 250 kHz For all boards if the channel gain list contains channel 16 only the digital input channel the maximum thro...

Страница 116: ...se Support SupportsLowToHighPulse Yes Variable Pulse Width Support SupportsVariablePulseWidth Yes None internal Gate Type Support SupportsGateNone Yes High Level Gate Type Support SupportsGateHighLevel Yesa a High edge and low edge gates are supported for one shot and repetitive one shot modes High level and low level are supported for event counting and rate generation modes Low Level Gate Type S...

Страница 117: ...117 8 Calibration Running the Calibration Utility 119 Calibrating the Analog Input Subsystem 120 Calibrating the Analog Output Subsystem 123 ...

Страница 118: ...essary readjust the calibration of the analog I O circuitry on the DT300 Series boards every six months Note Ensure that you installed the DT300 Series Device Driver and prior to using the DT300 Series Calibration Utility This chapter describes how to run the DT300 Series Calibration Utility and calibrate the analog I O circuitry of the DT300 Series boards ...

Страница 119: ...lity do the following 1 Click Start from the Task Bar 2 Browse to Programs Data Translation Inc Calibration DT300 Calibration Utility The main menu appears Once the DT300 Series Calibration Utility is running you can calibrate the analog I O circuitry as described in the following sections ...

Страница 120: ...urce 2 Connect Analog In 0 Return TB2 to the negative side of the precision voltage source 3 Connect Analog In 0 Return TB2 to Analog Ground TB18 4 Connect Analog In 1 TB3 to Analog In 1 Return TB4 and to Analog Ground TB18 To calibrate the analog input circuitry automatically continue on page 120 to calibrate the analog input circuitry manually continue on page 121 Using the Auto Calibration Proc...

Страница 121: ...d within 0 0010 V for the remaining DT300 Series boards 7 In the Range box select Bipolar and then FS for full scale 8 Click the increment or decrement arrows in the Manual Adjustment box until the display reads 9 3750 V with the external reference within 0 0001 V for the DT321 and DT322 boards and within 0 0010 V for the remaining DT300 Series boards 9 In the Range box select Unipolar and then Ze...

Страница 122: ...in software is no longer required the hardware calibrates this setting automatically If you are not satisfied with the analog input calibration you can load the factory default settings stored in the EEPROM by clicking Restore in the Factory Settings box ...

Страница 123: ...e following 1 From the main menu of the DT300 Series Calibration Utility click Configure and then Board 2 Select the name of the DT300 Series board to configure from the combo box and then click OK 3 From the main menu of the DT300 Series Calibration Utility click Calibrate 4 Click D A 5 In the D A box select DAC0 6 Click the increment or decrement arrows in the Manual Adjustment box until the dis...

Страница 124: ...Chapter 8 124 ...

Страница 125: ...125 9 Troubleshooting General Checklist 126 Technical Support 128 If Your Board Needs Factory Service 129 ...

Страница 126: ... not respond The board configuration is incorrect Check the configuration of your device driver to ensure that the board name and type are correct The board is incorrectly aligned in a PCI expansion slot Check that the slot in which your DT300 Series board is located is a PCI slot and that the board is correctly seated in the slot The board is damaged Contact Data Translation for technical support...

Страница 127: ...ll to handle all the system resources Check the power requirements of your system resources and if needed get a larger power supply consult the board s specifications on page 132 of this manual System lockup Board is not seated properly Check that the slot in which your DT300 Series board is located is a PCI slot that the board is correctly seated in the slot and that the board is secured in the s...

Страница 128: ...nslation com and click on the Support link When requesting technical support be prepared to provide the following information Your product serial number The hardware software product you need help on The version of the OMNI CD you are using Your contract number if applicable If you are located outside the USA contact your local distributor see our web site www datatranslation com for the name and ...

Страница 129: ...lation com for the name and telephone number of your nearest distributor All return shipments to Data Translation must be marked with the correct RMA number to ensure proper processing 2 Using the original packing materials if available package the module as follows Wrap the board in an electrically conductive plastic material Handle with ground protection A static discharge can destroy components...

Страница 130: ...Chapter 9 130 ...

Страница 131: ...s 132 Analog Output Specifications 134 Digital I O Specifications 135 Counter Timer Specifications 136 Power Physical and Environmental Specifications 137 Connector Specifications 138 Screw Terminal Panel Specifications 139 Cable Specifications 140 ...

Страница 132: ...l 1 0 LSB 1 0 LSB 4 0 LSB Differential linearity 0 5 LSB no missing codes 0 5 LSB no missing codes 1 2 LSB no missing codes to 15 bits Range V Bipolar Unipolar 1 25 2 5 5 10 0 to 1 25 0 to 2 5 0 to 5 0 to 10 1 25 2 5 5 10 0 to 1 25 0 to 2 5 0 to 5 0 to 10 1 25 2 5 5 10 Drift Zero Gain 30 μV 20 μV Gain C 30 ppm C 30 μV 20 μV Gain C 30 ppm C 25 μV 10 μV Gain C 20 ppm C Input impedance Off On 100 MΩ ...

Страница 133: ...al A D sample clock Input type Input load High level input voltage Low level input voltage Hysteresis High level input current Low level input current Minimum pulse width Maximum frequency Termination Schmitt trigger falling edge sensitive 1 HCT14 TTL 2 0 V minimum 0 8 V maximum 0 4 V minimum 1 5 V maximum 1 0 μA 1 0 μA 100 ns high 100 ns low See Data Throughput spec above 33 Ω series resistor Ext...

Страница 134: ... 5 LSB monotonic 1 LSB monotonic Output range DT302 DT304 DT322 10 V 0 to 10 V 5 V 0 to 5 V 10 V Zero Error Software adjustable to zero Gain Error DT302 DT304 DT322 2 LSB reference 6 LSB reference Current output 5 mA minimum 10 V 2 kΩ Output impedance 0 3 Ω typical Capacitive drive capability 0 001 μF minimum no oscillations Protection Short circuit to Analog Common Power on voltage 0 V 10 mV maxi...

Страница 135: ...esistor Inputs Input type Input load High level input voltage Low level input voltage High level input current Low level input current Level sensitive 2 TTL 2 0 V minimum 0 8 V maximum 3 μA 3 μA Level sensitive 2 TTL 2 0 V minimum 0 8 V maximum 3 μA 3 μA Level sensitive 1 TTL 2 0 V minimum 0 8 V maximum 100 μA 100 μA Outputs Output driver Output driver high voltage Output driver low voltage TTL 2 ...

Страница 136: ... 0 8 V maximum 0 4 V minimum 1 5 V maximum 1 0 μA 1 0 μA 100 ns high 100 ns low 5 0 MHz 33 Ω series resistor Gate Inputs Input type Input load High level input voltage Low level input voltage Hysteresis High level input current Low level input current Minimum pulse width Termination Schmitt trigger level sensitive 1 HCT14 TTL 2 0 V minimum 0 8 V maximum 0 4 V minimum 1 5 V maximum 1 0 μA 1 0 μA 10...

Страница 137: ...eature Specifications Power 5 V 0 25 V 5 V 12 V 12 V 5 V Power Out J1 1 1 2 A nominal not used 55 mA maximum 48 mA nominal 50 mA maximum 38 mA nominal 1 A maximum with resettable fuse Physical Dimensions Weight Length 6 875 inches 174 63 mm Width 4 2 inches 106 68 mm 4 38 ounces 124 grams Environmental Operating temperature range Storage temperature range Relative humidity 0 C to 70 C 25 C to 85 C...

Страница 138: ...ecifications for the DT300 Series board Table 30 Connector Specifications Feature Specifications Connector part number AMP 68 pin 0 05 Subminiature D 749621 7 Shielded enclosure with jack screws AMP 750752 1 Recommended shielded cable Madison 28 GA Twisted Pair 68KDK00029 ...

Страница 139: ...nsions Terminal material Board material Weight Mounting 68 pin connector SCSI II AMP Tyco 5787170 7 26 pin connector 3M N2526 50K2RB Polyamide 6 6 GV M 2 5 x 5 Chrome plated steel 14 to 28 AWG 4 9 inches W x 6 9 inches L x 0 90 inches H on 0 062 inches G10 FR4 Nickel plated brass FR4 7 ounces via four 4 40 screws Environmental Storage temperature range Operational Relative humidity 25 C to 85 C de...

Страница 140: ... lists the specifications for the cable EP305 Table 32 EP305 Cable Specifications Feature Specifications Length 2 meters Conductors 34 twisted pairs shielded 28 AWG on 50 mil centers Connectors 1 68 pin self locking receptacle AMP Tyco 5749621 7 ...

Страница 141: ...nts Connector J1 on the DT300 Series Board 142 Screw Terminal Assignments for Connector J1 on the STP300 144 Screw Terminal Assignments for Connector J2 on the STP300 146 Screw Terminal Assignments for the STP68 and STP68 DIN 147 ...

Страница 142: ... I O Port C Line 3 20 Digital I O Port C Line 1 21 Digital Ground 22 External A D Sample Clock In 23 Analog Output 1 Return 24 Analog Output 1 25 Analog Ground 26 Amp Low 27 Analog Input 15 7 Return 28 Analog Input 7 29 Analog Input 13 5 Return 30 Analog Input 5 31 Analog Input 11 3 Return 32 Analog Input 3 33 Analog Input 9 1 Return 34 Analog Input 1 35 Power Ground 36 User Clock Input 2 37 User ...

Страница 143: ... Analog Input 14 6 Return 62 Analog Input 6 63 Analog Input 12 4 Return 64 Analog Input 4 65 Analog Input 10 2 Return 66 Analog Input 2 67 Analog Input 8 0 Return 68 Analog Input 0 Table 33 Pin Assignments for Connector J1 on the DT300 Series Boards cont Pin Number Signal Description Pin Number Signal Description ...

Страница 144: ...og Ground 19 58 DAC0 Output 20 57 DAC0 Return 21 60 DAC0 Reference In and Out 22 23 DAC1 Return 23 24 DAC1 Output 24 59 DAC1 Reference In and Out 25 42 Digital Ground 26 41 User Clock Input 0 27 40 User Counter Output 0 28 39 External Gate 0 29 8 Digital Ground 30 7 User Clock Input 1 31 6 User Counter Output 1 32 5 External Gate 1 33 8 Digital Ground 34 36 User Clock Input 2 35 37 User Counter Ou...

Страница 145: ...ine 4 62 10 Digital I O Port B Line 5 63 43 Digital I O Port B Line 6 64 9 Digital I O Port B Line 7 65 54 Digital I O Port C Line 0 66 20 Digital I O Port C Line 1 67 53 Digital I O Port C Line 2 68 19 Digital I O Port C Line 3 69 52 Digital I O Port C Line 4 70 18 Digital I O Port C Line 5 71 51 Digital I O Port C Line 6 72 17 Digital Ground Table 34 Pin Assignments for Connector J1 on the STP30...

Страница 146: ...n the 5B08 backplane Description Pin Description 1 Analog Input 0 2 Analog Input 8 3 Analog Ground 4 Analog Input 9 5 Analog Input 1 6 Analog Ground 7 Analog Input 2 8 Analog Input 10 9 Analog Ground 10 Analog Input 11 11 Analog Input 3 12 Analog Ground 13 Analog Input 4 14 Analog Input 12 15 Analog Ground 16 Analog Input 13 17 Analog Input 5 18 Analog Ground 19 Analog Input 6 20 Analog Input 14 2...

Страница 147: ...tal Ground 18 18 Digital I O Port C Line 5 19 19 Digital I O Port C Line 3 20 20 Digital I O Port C Line 1 21 21 Digital Ground 22 22 External A D Sample Clock In 23 23 Analog Output 1 Return 24 24 Analog Output 1 25 25 Analog Ground 26 26 Amp Low 27 27 Analog Input 15 7 Return 28 28 Analog Input 7 29 29 Analog Input 13 5 Return 30 30 Analog Input 5 31 31 Analog Input 11 3 Return 32 32 Analog Inpu...

Страница 148: ...C1 Reference 60 60 DAC0 Reference 61 61 Analog Input 14 6 Return 62 62 Analog Input 6 63 63 Analog Input 12 4 Return 64 64 Analog Input 4 65 65 Analog Input 10 2 Return 66 66 Analog Input 2 67 67 Analog Input 8 0 Return 68 68 Analog Input 0 Table 36 Screw Terminal Assignments for the STP68 and STP68 DIN Screw Terminal Panel cont TB J1 Pin Signal Description TB J1 Pin Signal Description ...

Страница 149: ...149 C Using Your Own Screw Terminal Panel Analog Inputs 151 Analog Outputs 153 Digital Inputs and Counter Timer Inputs 154 Digital Outputs 155 ...

Страница 150: ... STP300 screw terminal panel consideration must be given to how the signals interact in the real world as well as how they interact with each other This appendix describes additional considerations to keep in mind when designing your own screw terminal panel for use with a DT300 Series board Refer to Appendix B for connector and cable specifications ...

Страница 151: ...jacent channels have high speed signals especially if these signals are TTL type with high speed edges Pseudo Differential Inputs Pseudo differential inputs allow one common mode voltage for all single ended inputs With this type of connection the low side of the instrumentation amplifier is used to sense an external common mode voltage For example if you have a signal conditioning rack the AMP LO...

Страница 152: ... problem to consider with differential inputs is the bias current error The differential impedance is usually hundreds of megaohms With a very small bias current multiplied by this high input impedance the voltage produced is out of the common mode input range of the instrumentation amplifier An external resistor must be provided to return this bias current to the analog common of the data acquisi...

Страница 153: ...her capacitive loads The grounds of most boards are optimized for analog inputs at the expense of some logic or high frequency noise on the analog outputs This is because the analog and digital grounds of the board are connected at the ADC s input The analog outputs are brought out as a high and a low signal but the low side is the analog ground at the DAC s output buffer To remove the high freque...

Страница 154: ...t circuitry is not damaged when power is removed On all Data Translation PCI boards current limiting is used to prevent damage in this fault condition On high speed clock inputs a ground that is located in the connector next to the clock must be connected as a twisted pair with the high speed clock input ...

Страница 155: ...to the digital ground provided in the connector next to the outputs If just eight of the digital outputs are switching 16 mA per output then 128 mA of current flows To minimize problems with ringing loading and EMI a 33 Ωresistor is used in series with all digital outputs You must consider this 33 Ωresistor if you are matching cable impedance to the far end ...

Страница 156: ...Appendix C 156 ...

Страница 157: ...49 error conditions 87 gain 75 76 input ranges 75 pseudo differential configuration 47 48 resolution 73 screw terminal assignments 44 single ended configuration 47 specifications 132 trigger acquisition modes 81 trigger sources 80 when not using the STP300 151 analog output 89 calibrating 123 channels 89 configuring the 5B01 backplane for 35 configuring the 7BP16 1 backplane 35 conversion mode 90 ...

Страница 158: ...P300 screw terminal panel 33 connecting signals analog outputs 51 current loop analog inputs 50 differential analog inputs 49 digital inputs and outputs 52 event counting applications 53 externally cascaded counter timers 54 56 57 frequency measurement applications 55 pseudo differential analog inputs 48 pulse output applications 56 single ended analog inputs 47 connector J1 pin assignments DT300 ...

Страница 159: ...ut 86 analog output 90 data transfer 87 DataAcq SDK 18 DC300 backshell connector kit 19 description of the functional subsystems A D 73 C T 94 D A 89 DIN and DOUT 92 device driver 18 differential channels 111 differential inputs 47 152 digital I O 92 lines 92 operation modes 93 resolution 92 screw terminal assignments 45 specifications 135 specifying digital inputs in analog input channel list 74 ...

Страница 160: ...nhibiting values from a channel 74 inprocess buffers 110 input configuration differential analog 47 pseudo differential analog 47 single ended analog 47 Input FIFO Overflow error 88 input ranges 75 inserting the board 28 internal clock 115 A D sample 76 C T 95 internal gate type 96 116 internal retrigger clock 79 J J1 connector pin assignments DT300 Series board 142 STP300 screw terminal panel 144...

Страница 161: ... connector 144 STP300 screw terminal panel J2 connector 146 STP68 panel J1 connector 147 ports 92 post trigger acquisition mode 81 109 power specifications 137 138 139 140 power supply HES14 21 19 PWR 977 19 power screw terminal assignments 45 pre trigger acquisition mode 82 109 pseudo differential inputs 47 151 pulse output duty cycle 97 one shot 103 rate generation 101 repetitive one shot 105 si...

Страница 162: ...kages 18 software supported 18 software trigger 80 114 software retriggered scan mode 78 specifications 131 analog input 132 analog output 134 counter timer 136 digital I O 135 environmental 137 138 139 140 physical 137 138 139 140 power 137 138 139 140 specifying a single channel analog input 74 digital I O 92 specifying one or more channels analog input 74 digital I O 74 stopping an operation an...

Страница 163: ...upport procedure 128 troubleshooting table 126 TTL trigger 81 U unipolar signals 75 unpacking 25 using your own screw terminal panel 149 V variable pulse width 116 Visual Basic for NET programs 18 Visual Basic programs 18 Visual C programs 18 Visual C programs 18 voltage ranges 112 number of 112 W W1 jumper 35 W4 to W7 jumpers 35 Windows 7 loading the device driver 30 Windows Vista loading the dev...

Страница 164: ...Index 164 ...

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