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Chapter 3 Hardware Overview

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National Instruments Corporation

3-7

DAQCard E Series User Manual

You cannot disable dither on the DAQCard-AI-16XE-50. This is
because the ADC resolution is so fine that the ADC and the PGIA
inherently produce more than 0.5 LSB rms of noise. This is equivalent
to having a dither circuit that is always enabled.

Multichannel Scanning Considerations

All of the DAQCard E Series cards can scan multiple channels at the
same maximum rate as their single-channel rate; however, pay careful
attention to the settling times for each of the DAQCards. The settling
time for most of the DAQCards is independent of the selected gain,
even at the maximum sampling rate. The settling time for the high
channel count and very high-speed cards is gain dependent, which can
affect the useful sampling rate for a given gain. No extra settling time
is necessary between channels as long as the gain is constant and source

Figure 3-3.

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Содержание DAQCard E Series

Страница 1: ... Series User Manual Multifunction I O Cards for PCMCIA June 1996 Edition Part Number 321138A 01 Copyright 1996 National Instruments Corporation All Rights Reserved This document was created with FrameMaker 4 0 4 ...

Страница 2: ... 879 9422 Austria 0662 45 79 90 0 Belgium 02 757 00 20 Canada Ontario 519 622 9310 Canada Québec 514 694 8521 Denmark 45 76 26 00 Finland 90 527 2321 France 1 48 14 24 24 Germany 089 741 31 30 Hong Kong 2645 3186 Italy 02 413091 Japan 03 5472 2970 Korea 02 596 7456 Mexico 95 800 010 0793 Netherlands 0348 433466 Norway 32 84 84 00 Singapore 2265886 Spain 91 640 0085 Sweden 08 730 49 70 Switzerland ...

Страница 3: ...NSEQUENTIAL DAMAGES EVEN IF ADVISED OF THE POSSIBILITY THEREOF This limitation of the liability of National Instruments will apply regardless of the form of action whether in contract or tort including negligence Any action against National Instruments must be brought within one year after the cause of action accrues National Instruments shall not be liable for any delay in performance due to caus...

Страница 4: ...ted 1 2 Software Programming Choices 1 2 LabVIEW and LabWindows CVI Application Software 1 2 NI DAQ Driver Software 1 3 Register Level Programming 1 4 Optional Equipment 1 5 Custom Cabling 1 5 Unpacking 1 6 Chapter 2 Installation and Configuration Installation 2 1 Configuration 2 2 Chapter 3 Hardware Overview Analog Input 3 2 Input Mode 3 2 Input Polarity and Input Range 3 3 Considerations for Sel...

Страница 5: ...eferenced or Floating Signal Sources 4 16 Single Ended Connection Considerations 4 18 Single Ended Connections for Floating Signal Sources RSE Configuration 4 19 Single Ended Connections for Grounded Signal Sources NRSE Configuration 4 19 Common Mode Signal Rejection Considerations 4 20 Digital I O Signal Connections 4 21 Power Connections 4 22 Timing Connections 4 22 Programmable Function Input C...

Страница 6: ...4 42 FREQ_OUT Signal 4 43 Field Wiring Considerations 4 44 Chapter 5 Calibration Loading Calibration Constants 5 1 Self Calibration 5 2 External Calibration 5 2 Other Considerations 5 3 Appendix A Specifications DAQCard AI 16E 4 A 1 DAQCard AI 16XE 50 A 8 Appendix B Optional Cable Connector Descriptions Appendix C PC Card Questions and Answers Appendix D Common Questions Appendix E Power Managemen...

Страница 7: ...Table of Contents DAQCard E Series User Manual viii National Instruments Corporation Appendix F Customer Communication Glossary Index ...

Страница 8: ... 4 4 Differential Input Connections for Ground Referenced Signals 4 15 Figure 4 5 Differential Input Connections for Nonreferenced Signals 4 16 Figure 4 6 Single Ended Input Connections for Nonreferenced or Floating Signals 4 19 Figure 4 7 Single Ended Input Connections for Ground Referenced Signals 4 20 Figure 4 8 Digital I O Connections 4 21 Figure 4 9 Timing I O Connections 4 23 Figure 4 10 Typ...

Страница 9: ...4 42 Figure B 1 68 Pin AI Connector Pin Assignments B 2 Figure B 2 50 Pin AI Connector Pin Assignments B 3 Tables Table 3 1 Available Input Configurations for the DAQCard E Series 3 3 Table 3 2 Actual Range and Measurement Precision 3 4 Table 3 3 Actual Range and Measurement Precision DAQCard AI 16XE 50 3 5 Table 4 1 I O Connector Signal Descriptions 4 3 Table 4 2 I O Signal Summary DAQCard AI 16E...

Страница 10: ... I O Organization of This Manual The DAQCard E Series User Manual is organized as follows Chapter 1 Introduction describes the DAQCard E Series cards lists what you need to get started describes the optional software and optional equipment and explains how to unpack your DAQCard E Series card Chapter 2 Installation and Configuration explains how to install and configure your DAQCard E Series card ...

Страница 11: ...ymbols The Index alphabetically lists topics covered in this manual including the page where you can find the topic Conventions Used in This Manual The following conventions are used in this manual The indicates that the text following it applies only to specific DAQCard E Series boards Angle brackets containing numbers separated by an ellipsis represent a range of values associated with a bit por...

Страница 12: ... using SCXI this is the first manual you should read It gives an overview of the SCXI system and contains the most commonly needed information for the modules chassis and software Your SCXI hardware user manuals If you are using SCXI read these manuals next for detailed information about signal connections and module configuration They also explain in greater detail how the module works and contai...

Страница 13: ...umentation The following National Instruments document contains information you may find helpful DAQCard E Series Register Level Programmer Manual This manual is available by request If you are using NI DAQ LabVIEW or LabWindows CVI you should not need the register level programming manual Customer Communication National Instruments wants to receive your comments on our products and manuals We are...

Страница 14: ...mers for timing I O The DAQCard E Series cards use the National Instruments DAQ STC system timing controller for time related functions The DAQ STC consists of three timing groups that control analog input analog output and general purpose counter timer functions These groups include a total of seven 24 bit and three 16 bit counters and a maximum timing resolution of 50 ns The DAQCard E Series car...

Страница 15: ...I Application Software LabVIEW and LabWindows CVI are innovative program development software packages for data acquisition and control applications LabVIEW uses graphical programming whereas LabWindows CVI enhances traditional programming languages Both packages include extensive libraries for data acquisition instrument control data analysis and graphical data presentation LabVIEW features inter...

Страница 16: ...quisition high speed A D conversion analog output D A conversion waveform generation timed D A conversion digital I O counter timer operations SCXI RTSI calibration messaging and acquiring data to extended memory NI DAQ has both high level DAQ I O functions for maximum ease of use and low level DAQ I O functions for maximum flexibility and performance Examples of high level functions are streaming...

Страница 17: ... can be very time consuming and inefficient and is not recommended for most users Even if you are an experienced register level programmer consider using NI DAQ LabVIEW or LabWindows CVI to program your National Instruments DAQ hardware Using the NI DAQ LabVIEW or LabWindows CVI software is as easy and as flexible as register level programming and can save weeks of development time Figure 1 1 The ...

Страница 18: ... sample and hold circuitry and relays For more specific information about these products refer to your National Instruments catalogue or call the office nearest you Custom Cabling National Instruments offers cables and accessories for you to prototype your application or to use if you frequently change DAQCard interconnections If you want to develop your own cable however the following guidelines ...

Страница 19: ...elded 68 position ribbon cable DAQCard AI 16XE 50 PSHR68 68M a shielded 68 position ribbon cable with male to male connectors This connects to an SH6868 or SH6850 shielded cable PR68 68F an unshielded 68 position ribbon cable Unpacking Your DAQCard E Series card is shipped in an antistatic vinyl box When you are not using your DAQCard store it in this box Because your DAQCard is enclosed in a full...

Страница 20: ...68 pin I O connector on the other end Insert the PCMCIA bus connector into any available Type II PCMCIA slot until the connector is seated firmly Notice that the DAQCard and I O cable are both keyed so that the cable can be inserted only one way Be careful not to put strain on the I O cable when inserting it into and removing it from the DAQCard Always grasp the cable by the connector you are plug...

Страница 21: ... your NI DAQ release notes to install your driver software Find the installation section for your operating system and follow the instructions given there If you are using LabVIEW refer to your LabVIEW release notes to install your application software After you have installed LabVIEW Figure 2 1 A Typical Configuration for the DAQCard E Series Card PCMCIA Socket Portable Computer PSHR68 68M I O Ca...

Страница 22: ... follow the instructions given there for your operating system and LabVIEW If you are using LabWindows CVI refer to your LabWindows CVI release notes to install your application software After you have installed LabWindows CVI refer to the NI DAQ release notes and follow the instructions given there for your operating system and LabWindows CVI ...

Страница 23: ...figuration Memory NI PGIA Gain Amplifier Calibration Mux Mux Mode Selection Switches Analog Muxes Voltage REF Calibration DACs Dither Circuitry Trigger Analog Trigger Circuitry 2 Trigger Level DACs DAQ STC Analog Input Timing Control Analog Output Timing Control Digital I O Trigger Counter Timing I O RTSI Bus Interface DMA Interrupt Request Bus Interface 8 8 AI Control Data 16 Analog Input Control...

Страница 24: ... input configuration uses up to eight channels Input modes are programmed on a per channel basis for multimode scanning For example you can configure the circuitry to scan 12 channels four differentially configured channels and eight Figure 3 2 DAQCard AI 16XE 50 Block Diagram Timing PFI Trigger I O Connector 3 2 PCMCIA Connector Digital I O 8 16 Bit Sampling A D Converter Configuration Memory Pro...

Страница 25: ...ipolar input range of 10 V 0 to 10 V and a bipolar input range of 10 V 5 V You can program polarity and range settings on a per channel basis so that you can configure each input channel uniquely Table 3 1 Available Input Configurations for the DAQCard E Series Configuration Description DIFF A channel configured in DIFF mode uses two analog channel input lines One line connects to the positive inp...

Страница 26: ...at the input voltage range is between 0 and Vref where Vref is a positive reference voltage Bipolar input means that the input voltage range is between Vref and Vref The Table 3 2 Actual Range and Measurement Precision Range Configuration Gain Actual Input Range Resolution1 0 to 10 V 1 0 2 0 5 0 10 0 20 0 50 0 100 0 0 to 10 V 0 to 5 V 0 to 2 V 0 to 1 V 0 to 500 mV 0 to 200 mV 0 to 100 mV 2 44 mV 1...

Страница 27: ...ility by matching the input signal ranges to those that the ADC can accommodate The DAQCard AI 16XE 50 has gains of 1 2 10 and 100 and is suited for a wide variety of signal levels With the proper gain setting you can use the ADC s full resolution to measure the input signal Table 3 3 shows the overall input range and precision according to the range configuration and gain used Table 3 3 Actual Ra...

Страница 28: ...nalysis In such applications noise modulation is decreased and differential linearity is improved by the addition of dither When taking DC measurements such as when checking the DAQCard calibration you should enable dither and average about 1 000 points to take a single reading This process removes the effects of quantization and reduces measurement noise resulting in improved resolution For high ...

Страница 29: ... sampling rate The settling time for the high channel count and very high speed cards is gain dependent which can affect the useful sampling rate for a given gain No extra settling time is necessary between channels as long as the gain is constant and source Figure 3 3 Dither 100 200 300 400 0 500 4 0 2 0 0 0 2 0 4 0 6 0 LSBs LSBs LSBs LSBs 6 0 100 200 300 400 0 500 4 0 2 0 0 0 2 0 4 0 6 0 6 0 100...

Страница 30: ...circuitry to settle this much For a 16 bit DAQCard to settle within 0 0015 15 ppm or 1 LSB of the 100 mV full scale range on channel 1 the input circuitry has to settle within 0 00004 0 4 ppm or 1 400 LSB of the 4 V step It may take as long as 200 µs for the circuitry to settle this much In general this extra settling time is not needed when the PGIA is switching to a lower gain Settling times can...

Страница 31: ...he PFI0 TRIG1 pin on the I O connector or a postgain signal from the output of the PGIA as shown in Figure 3 4 The trigger level range for the direct analog channel is 10 V in 78 mV steps The range for the post PGIA trigger selection is simply the full scale range of the selected channel and the resolution is that range divided by 256 There are five analog triggering modes available as shown in Fi...

Страница 32: ...r is generated when the signal value is less than lowValue HighValue is unused In above high level analog triggering mode the trigger is generated when the signal value is greater than highValue LowValue is unused Figure 3 5 Below Low Level Analog Triggering Mode Figure 3 6 Above High Level Analog Triggering Mode lowValue Trigger highValue Trigger ...

Страница 33: ...the signal value is between the lowValue and the highValue In high hysteresis analog triggering mode the trigger is generated when the signal value is greater than highValue with the hysteresis specified by lowValue Figure 3 7 Inside Region Analog Triggering Mode Figure 3 8 High Hysteresis Analog Triggering Mode highValue Trigger lowValue highValue Trigger lowValue ...

Страница 34: ... after the analog input signal crosses a specific threshold As another example the analog output section can be configured to update its outputs whenever the analog input signal crosses a specific threshold Digital I O The DAQCard E Series cards contain eight lines of digital I O for general purpose use You can individually configure each line through software for either input or output At system ...

Страница 35: ...ther boards and circuits The DAQ STC has a total of 13 internal timing signals that can be controlled by an external source These timing signals can also be controlled by signals generated internally to the DAQ STC and these selections are fully software configurable For example the signal routing multiplexer for controlling the CONVERT signal is shown in Figure 3 10 This figure shows that CONVERT...

Страница 36: ...xible routing scheme reduces the need to change physical connections to the I O connector for different applications You can also individually enable each of the PFI pins to output a specific internal timing signal For example if you need the UPDATE signal as an output on the I O connector software can turn on the output driver for the PFI5 UPDATE pin DAQCard Clocks Many functions performed by the...

Страница 37: ...u can connect your DAQCard to 50 pin signal conditioning modules and terminal blocks I O Connector Figure 4 1 shows the pin assignments for the 68 pin I O connector on the DAQCard AI 16E 4 and DAQCard AI 16XE 50 A signal description follows the connector pinouts Warning Exceeding the differential and common mode input ranges distorts your input signals Exceeding the maximum input voltage rating ca...

Страница 38: ...rved Reserved ACH15 AIGND ACH6 ACH13 AIGND ACH4 AIGND ACH3 ACH10 AIGND ACH1 ACH8 DGND PFI8 GPCTR0_SOURCE PFI7 STARTSCAN GPCTR1_OUT PFI4 GPCTR1_GATE PFI3 GPCTR1_SOURCE PFI2 CONVERT DGND DGND DGND EXTSTROBE SCANCLK DIO3 DIO7 DIO2 DGND DIO5 DIO0 DGND Reserved Reserved Reserved ACH7 ACH14 AIGND ACH5 ACH12 AISENSE ACH11 AIGND ACH2 ACH9 AIGND ACH0 1 35 2 36 3 37 4 38 5 39 6 40 7 41 8 42 9 43 10 44 11 45...

Страница 39: ...nput or Output Digital I O signals DIO6 and 7 can control the up down signal of general purpose counters 0 and 1 respectively 5 V DGND Output 5 VDC Source These pins are fused for up to 250 mA of 5 V supply The fuse is self resetting SCANCLK DGND Output Scan Clock This pin pulses once for each A D conversion in the scanning modes when enabled The low to high edge indicates when the input signal ca...

Страница 40: ...ects the actual source connected to general purpose counter 1 PFI4 GPCTR1_GATE DGND Input Output PFI4 Counter 1 Gate As an input this is one of the PFIs As an output this is the GPCTR1_GATE signal This signal reflects the actual gate signal connected to general purpose counter 1 GPCTR1_OUT DGND Output Counter 1 Output This output is from the general purpose counter 1 output PFI5 UPDATE DGND Input ...

Страница 41: ...ected to general purpose counter 0 PFI9 GPCTR0_GATE DGND Input Output PFI9 Counter 0 Gate As an input this is one of the PFIs As an output this is the GPCTR0_GATE signal This signal reflects the actual gate signal connected to general purpose counter 0 GPCTR0_OUT DGND Output Counter 0 Output This output is from the general purpose counter 0 output FREQ_OUT DGND Output Frequency Output This output ...

Страница 42: ...1_SOURCE DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI4 GPCTR1_GATE DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu GPCTR1_OUT DO 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI5 UPDATE DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI6 WFTRIG DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI7 STARTSCAN DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI8 GPCTR0_SOURCE DIO Vcc 0 5 3 5 at V...

Страница 43: ... also pulled up with a 10 kΩ resistor 2Also pulled down with a 10 kΩ resistor Warning UnlessspecificallyindicatedintheProtectioncolumnofTable4 2 theoutputsofDAQCard E Seriescards are not short circuit protected Exceeding the output limit in the Source and Sink columns can damage your DAQCard Table 4 2 I O Signal Summary DAQCard AI 16E 4 Continued Signal Name Drive Impedance Input Output Protection...

Страница 44: ... 4 1 1 50 kΩ pu1 SCANCLK DO 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu EXTSTROBE DO 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI0 TRIG1 DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI1 TRIG2 DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI2 CONVERT DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI3 GPCTR1_SOURCE DIO Vcc 0 5 3 5 at Vcc 0 4 5 at 0 4 1 5 50 kΩ pu PFI4 GPCTR1_GATE DIO Vcc 0 5 3 5 at...

Страница 45: ...Digital Input Output pu pullup DO Digital Output 1DIO 6 7 are also pulled up with a 10 kΩ resistor Warning UnlessspecificallyindicatedintheProtectioncolumnofTable 4 3 theoutputsofDAQCard E Seriescards are not short circuit protected Exceeding the output limit in the Source and Sink columns can damage your DAQCard Table 4 3 I O Signal Summary DAQCard AI 16XE 50 Continued Signal Name Drive Impedance...

Страница 46: ...for any damages resulting from such signal connections The maximum input voltage ratings are listed in Tables 4 2 through 4 3 in the Protection column In NRSE mode the AISENSE signal is connected internally to the negative input of the DAQCard PGIA when their corresponding channels are selected In DIFF and RSE modes this signal is left unconnected AIGND is an analog input common signal that is rou...

Страница 47: ... amplifier The amplifier output voltage is referenced to the ground for the DAQCard Your DAQCard ADC measures this output voltage when it performs A D conversions You must reference all signals to ground either at the source device or at the DAQCard If you have a floating source you should reference the signal to ground by using the RSE input mode or the DIFF input configuration with bias resistor...

Страница 48: ...e common mode input range Ground Referenced Signal Sources A ground referenced signal source is one that is connected in some way to the building system ground and is therefore already connected to a common ground point with respect to the DAQCard assuming that the computer is plugged into the same power system Nonisolated output of instruments and devices that plug into the building power system ...

Страница 49: ...ferenced NRSE Floating Signal Source Not Connected to Building Ground Grounded Signal Source Examples Ungrounded Thermocouples Signal conditioning with isolated outputs Battery devices Examples Plug in instruments with nonisolated outputs V1 ACH V1 ACH ACH See text for information on bias resistors See text for information on bias resistors R Signal Source Type ACH AIGND V1 ACH AIGND NOT RECOMMEND...

Страница 50: ...nput each signal uses two multiplexer inputs one for the signal and one for its reference signal Therefore with a differential configuration for every channel up to eight analog input channels are available You should use differential input connections for any channel that meets any of the following conditions The input signal is low level less than 1 V The leads connecting the signal to the DAQCa...

Страница 51: ...ype of connection the PGIA rejects both the common mode noise in the signal and the ground potential difference between the signal source and the DAQCard ground shown as Vcm in Figure 4 4 Figure 4 4 Differential Input Connections for Ground Referenced Signals Ground Referenced Signal Source Common Mode Noise and Ground Potential Input Multiplexers AISENSE Instrumentation Amplifier Vm Measured Volt...

Страница 52: ... is not likely to remain within the common mode signal range of the PGIA and the PGIA will saturate causing erroneous readings You must reference the source to AIGND The easiest way is simply to connect the positive side of the signal to the positive input of the PGIA and connect the negative side of the signal to AIGND as well as to the negative input of the PGIA Figure 4 5 Differential Input Con...

Страница 53: ...impedance of the PGIA You can fully balance the signal path by connecting another resistor of the same value between the positive input and AIGND as shown in Figure 4 5 This fully balanced configuration offers slightly better noise rejection but has the disadvantage of loading the source down with the DAQCard combination sum of the two resistors If for example the source impedance is 2 kΩ and each...

Страница 54: ... signals DIFF input connections are recommended for greater signal integrity for any input signal that does not meet the preceding conditions You can software configure the DAQCard channels for two different types of single ended connections RSE configuration and NRSE configuration Use the RSE configuration for floating signal sources in this case the DAQCard provides the reference ground point fo...

Страница 55: ...ce is connected to the negative input of the PGIA The ground point of the signal should therefore be connected to the AISENSE pin Any potential difference between the DAQCard ground and the signal ground appears as a common mode signal at both the positive and negative inputs of the PGIA and this difference is rejected by the amplifier If the input circuitry of a DAQCard were referenced to ground ...

Страница 56: ...onnections the PGIA can reject common mode noise pickup in the leads connecting the signal sources to the DAQCard The PGIA can reject common mode signals as long as V in and V in are both within 11 V of AIGND The DAQCard AI 16XE 50 has the additional restriction that V in V in added to the gain times V in V in must be within 26 V of AIGND At gains of 10 and 100 this is roughly equivalent to restri...

Страница 57: ...n program all lines individually to be inputs or outputs Warning Exceeding the maximum input voltage ratings which are listed in Tables 4 2 through 4 3 can damage the DAQCard and the computer National Instruments is NOT liable for any damages resulting from such signal connections Figure 4 8 shows signal connections for three typical digital I O applications Figure 4 8 Digital I O Connections LED ...

Страница 58: ...ound or to any other voltage source on the DAQCard or any other device Doing so can damage the DAQCard and the computer National Instruments is NOT liable for damages resulting from such a connection Timing Connections Warning Exceeding the maximum input voltage ratings which are listed in Tables 4 2 through 4 3 can damage the DAQCard and the computer National Instruments in NOT liable for any dam...

Страница 59: ...ing signals are explained in the General Purpose Timing Signal Connections section later in this chapter All digital timing connections are referenced to DGND This reference is demonstrated in Figure 4 9 which shows how to connect an external TRIG1 source and an external CONVERT source to two of the DAQCard PFI pins Figure 4 9 Timing I O Connections TRIG1 Source DGND PFI0 TRIG1 PFI2 CONVERT CONVER...

Страница 60: ... any of the 13 timing signals but the edge or level detection will depend upon the particular timing signal being controlled The detection requirements for each timing signal are listed within the section that discusses that individual signal In edge detection mode the minimum pulse width required is 10 ns This applies for both rising edge and falling edge polarity settings There is no maximum pul...

Страница 61: ... data acquisition sequence The description for each signal shown in these figures is included later in this chapter Figure 4 10 Typical Posttriggered Acquisition Figure 4 11 Typical Pretriggered Acquisition 1 3 0 4 2 TRIG1 STARTSCAN CONVERT Scan Counter Don t Care 0 1 2 3 1 0 2 2 2 TRIG1 TRIG2 STARTSCAN CONVERT Scan Counter ...

Страница 62: ...ion begins The polarity of this output is software selectable but is typically configured so that a low to high leading edge can clock external analog input multiplexers indicating when the input signal has been sampled and can be removed This signal has a 400 to 500 ns pulse width and is software enabled Figure 4 12 shows the timing for the SCANCLK signal Figure 4 12 SCANCLK Signal Timing tw tw 4...

Страница 63: ...pin Refer to Figures 4 10 and 4 11 for the relationship of TRIG1 to the data acquisition sequence As an input the TRIG1 signal is configured in the edge detection mode You can select any PFI pin as the source for TRIG1 and configure the polarity selection for either rising or falling edge The selected edge of the TRIG1 signal starts the data acquisition sequence for both posttriggered and pretrigg...

Страница 64: ...nitiate pretriggered data acquisition operations In most pretriggered applications the TRIG1 signal is generated by a software trigger Refer to the TRIG2 signal description for a complete description of the use of TRIG1 and TRIG2 in a pretriggered data acquisition operation Figure 4 14 TRIG1 Input Signal Timing Figure 4 15 TRIG1 Output Signal Timing Rising edge polarity Falling edge polarity tw tw...

Страница 65: ... indicates the minimum number of scans before TRIG2 can be recognized After the scan counter decrements to zero it is loaded with the number of posttrigger scans to acquire while the acquisition continues The DAQCard ignores the TRIG2 signal if it is asserted prior to the scan counter decrementing to zero After the selected edge of TRIG2 is received the DAQCard acquires a fixed number of scans and...

Страница 66: ...pin Refer to Figures 4 10 and 4 11 for the relationship of STARTSCAN to the data acquisition sequence As an input the STARTSCAN signal is configured in the edge detection mode You can select any PFI pin as the source for STARTSCAN and configure the polarity selection for either rising or falling edge The selected edge of the STARTSCAN signal initiates a Figure 4 16 TRIG2 Input Signal Timing Figure...

Страница 67: ...The first is an active high pulse with a pulse width of 50 to 100 ns which indicates the start of the scan The second action is an active high pulse that terminates at the start of the last conversion in the scan which indicates a scan in progress STARTSCAN will be deasserted toff after the last conversion in the scan is initiated This output is set to tri state at startup Figures 4 18 and 4 19 sh...

Страница 68: ...l CONVERT the first external pulse after STARTSCAN will generate a conversion The STARTSCAN pulses should be separated by at least one scan period A counter on your DAQCard internally generates the STARTSCAN signal unless you select some external source This counter is started by the TRIG1 signal and is stopped either by software or by the sample counter Figure 4 19 STARTSCAN Output Signal Timing ...

Страница 69: ... acquisition sequence As an input the CONVERT signal is configured in the edge detection mode You can select any PFI pin as the source for CONVERT and configure the polarity selection for either rising or falling edge The selected edge of the CONVERT signal initiates an A D conversion As an output the CONVERT signal reflects the actual convert pulse that is connected to the ADC This is true even i...

Страница 70: ...ated by either an internal or external CONVERT signal are inhibited unless they occur within a data acquisition sequence Scans occurring within a data acquisition sequence may be gated by either the hardware AIGATE signal or software command register gate AIGATE Signal Any PFI pin can externally input the AIGATE signal which is not available as an output on the I O connector The AIGATE signal can ...

Страница 71: ...SOURCE signal which is not available as an output on the I O connector The onboard scan interval counter uses the SISOURCE signal as a clock to time the generation of the STARTSCAN signal You must configure the PFI pin you select as the source for the SISOURCE signal in the level detection mode You can configure the polarity selection for the PFI pin for either active high or active low The maximu...

Страница 72: ...s the source for the UISOURCE signal in the level detection mode You can configure the polarity selection for the PFI pin for either active high or active low Figure 4 23 shows the timing requirements for the UISOURCE signal The maximum allowed frequency is 20 MHz with a minimum pulse width of 23 ns high or low There is no minimum frequency limitation Either the 20 MHz or 100 kHz internal timebase...

Страница 73: ...tection mode You can select any PFI pin as the source for GPCTR0_SOURCE and configure the polarity selection for either rising or falling edge As an output the GPCTR0_SOURCE signal reflects the actual clock connected to general purpose counter 0 This is true even if another PFI is externally inputting the source clock This signal is set to input High Z at startup Figure 4 24 shows the timing requi...

Страница 74: ...ing and stopping the counter generating interrupts saving the counter contents and so on As an output the GPCTR0_GATE signal reflects the actual gate signal connected to general purpose counter 0 This is true even if the gate is being externally generated by another PFI This signal is set to input High Z at startup Figure 4 25 shows the timing requirements for the GPCTR0_GATE signal GPCTR0_OUT Sig...

Страница 75: ...the DIO6 pin free for general use GPCTR1_SOURCE Signal Any PFI pin can externally input the GPCTR1_SOURCE signal which is available as an output on the PFI3 GPCTR1_SOURCE pin As an input the GPCTR1_SOURCE signal is configured in the edge detection mode You can select any PFI pin as the source for GPCTR1_SOURCE and configure the polarity selection for either rising or falling edge As an output the ...

Страница 76: ...4 GPCTR1_GATE pin As an input the GPCTR1_GATE signal is configured in edge detection mode You can select any PFI pin as the source for GPCTR1_GATE and configure the polarity selection for either rising or falling edge You can use the gate signal in a variety of different applications to perform such actions as starting and stopping the counter generating interrupts saving the counter contents and ...

Страница 77: ... counter 1 You have two software selectable output options pulse on TC and toggle output polarity on TC The output polarity is software selectable for both options This signal is set to input High Z at startup Figure 4 29 shows the timing requirements for the GPCTR1_OUT signal Figure 4 28 GPCTR1_GATE Signal Timing in Edge Detection Mode Figure 4 29 GPCTR1_OUT Signal Timing Rising edge polarity Fal...

Страница 78: ...ignal transitions shown in Figure 4 30 are referenced to the rising edge of the SOURCE signal This timing diagram assumes that the counters are programmed to count rising edges The same timing diagram but with the source signal inverted and referenced to the falling edge of the source signal would apply when the counter is programmed to count falling edges The GATE input timing parameters are refe...

Страница 79: ...ent results in an uncertainty of one source clock period with respect to unsynchronized gating sources The OUT output timing parameters are referenced to the signal at the SOURCE input or to one of the internally generated clock signals on the DAQCards Figure 4 30 shows the OUT signal referenced to the rising edge of a source signal Any OUT signal state changes occur within 80 ns after the rising ...

Страница 80: ... one point to the signal source ground This kind of connection is required for signals traveling through areas with large magnetic fields or high electromagnetic interference Route signals to the DAQCard carefully Keep cabling away from noise sources The most common noise source in a computer data acquisition system is the video monitor Separate the monitor from the analog signals as much as possi...

Страница 81: ...n this chapter The first level is the fastest easiest and least accurate whereas the last level is the slowest most difficult and most accurate Loading Calibration Constants Your DAQCard is factory calibrated before shipment at approximately 25 C to the levels indicated in Appendix A Specifications The associated calibration constants the values that were written to the CalDACs to achieve calibrat...

Страница 82: ...ediately after self calibration the only significant residual calibration error could be gain error due to time or temperature drift of the onboard voltage reference This error is addressed by external calibration which is discussed in the following section If you are interested primarily in relative measurements you can ignore a small amount of gain error and self calibration should be sufficient...

Страница 83: ...accurate To calibrate a 16 bit DAQCard the external reference should be at least 0 001 10 ppm accurate Other Considerations The CalDACs adjust the gain error of each analog output channel by adjusting the value of the reference voltage supplied to that channel This calibration mechanism is designed to work only with the internal 10 V reference Thus in general it is not possible to calibrate the an...

Страница 84: ...pecifications are typical at 25 C unless otherwise noted DAQCard AI 16E 4 Analog Input Input Characteristics Number of channels 16 single ended 16 pseudo differential or 8 differential software selectable on a per channel basis Type of ADC Successive approximation Resolution 12 bits 1 in 4 096 Max sampling rate 250 kS s guaranteed This document was created with FrameMaker 4 0 4 ...

Страница 85: ...ed on 15 V powered off Inputs protected ACH 0 15 AISENSE FIFO buffer size 1 024 samples Data transfers DMA interrupt programmed I O DMA modes Single transfer demand transfer Configuration memory size 512 words Input signal ranges Board Gain Software Selectable Board Range Software Selectable Bipolar Unipolar 0 5 10 V 1 5 V 0 to 10 V 2 2 5 V 0 to 5 V 5 1 V 0 to 2 V 10 500 mV 0 to 1 V 20 250 mV 0 to...

Страница 86: ... 1 0 mV max Postgain error before calibration 265 mV max Gain error relative to calibration reference After calibration gain 1 0 02 of reading max Before calibration 2 5 of reading max Gain 1 with gain error adjusted to 0 at gain 1 0 02 of reading max Amplifier Characteristics Input impedance Normal powered on 100 GΩ in parallel with 100 pF Powered off 1 kΩ min Overload 1 kΩ min Input bias current...

Страница 87: ...V C Gain temperature coefficient 20 ppm C Onboard calibration reference Level 5 000 V 2 5 mV actual value stored in EEPROM Temperature coefficient 5 ppm C max Long term stability 15 ppm Settling time for full scale step Gain Accuracy 0 012 0 5 LSB 0 024 1 LSB 0 5 4 µs typ 8 µs max 4 µs max System noise in LSB rms not including quantization Gain Noise dither off Noise dither on 0 5 to 10 0 2 0 5 to...

Страница 88: ...its Compatibility TTL CMOS Base clocks available Counter timers 20 MHz 100 kHz Frequency scalers 10 MHz 100 kHz Base clock accuracy 0 01 Max source frequency 20 MHz Min source pulse duration 10 ns in edge detection mode Min gate pulse duration 10 ns in edge detection mode Data transfers DMA interrupts programmed I O DMA modes Single transfer Digital logic levels Level Min Max Input low voltage 0 V...

Страница 89: ...Bandwidth 3 dB 2 0 MHz internal 3 0 MHz external External input PFI0 TRIG1 Impedance 10 kΩ Coupling DC Protection 35 V powered off 0 5 to VCC when configured as a digital signal 35 V when configured as an analog trigger signal or disabled Digital Trigger Compatibility TTL Response Rising or falling edge Pulse width 10 ns min Power Requirement from PCMCIA I O channel 5 VDC 5 280 mA typ in operation...

Страница 90: ...QCard has a current requirement of 270 290 mA but if the analog inputs being sampled are overdriven at high gains or if the analog inputs are left floating when the DAQCard is not in use the current may increase to 400 mA You can save current by using the NI DAQ power down utility when your DAQCard is not in use Physical PC Card type Type II I O connector PCMCIA 68 position female connector Enviro...

Страница 91: ...ning gain 100 Input coupling DC Maximum working voltage signal common mode The average voltage of each differential pair should remain within 8 V of ground Overvoltage protection 25 V powered on 15 V powered off Inputs protected ACH 0 15 AISENSE FIFO buffer size 1 024 S Data transfers DMA interrupt programmed I O DMA modes Single transfer demand transfer Configuration memory size 512 words Input s...

Страница 92: ...max bipolar 81 µV max unipolar Postgain error before calibration 37 5 mV max bipolar 175 75 mV max unipolar Gain error relative to calibration reference After calibration gain 1 7 6 ppm of reading max Before calibration 27 650 ppm of reading max With gain error adjusted to 0 at gain 1 Gain 2 10 100 ppm of reading Gain 100 250 ppm of reading Amplifier Characteristics Input impedance Normal powered ...

Страница 93: ... max to 1 LSB 50 µs typ to 4 LSB System noise including quantization noise Gain 1 2 10 1 0 LSB rms Gain 100 1 2 LSB rms bipolar 1 6 LSB rms unipolar Crosstalk 85 dB max DC to 20 kHz Stability Recommended warm up time 15 min Offset temperature coefficient Pregain 1 µV C Postgain 120 µV C Gain temperature coefficient 15 ppm C Onboard calibration reference Level 5 000 V 2 5 mV actual value stored in ...

Страница 94: ...timers 24 bits Frequency scaler 4 bits Compatibility TTL CMOS Base clocks available Counter timers 20 MHz 100 kHz Frequency scaler 10 MHz 100 kHz Base clock accuracy 0 01 Max source frequency 20 MHz Min source pulse duration 10 ns edge detection mode Min gate pulse duration 10 ns edge detection mode Data transfers DMA interrupts programmed I O Digital logic levels Level Min Max Input low voltage 0...

Страница 95: ...ge Pulse width 10 ns min Power Requirement 5 VDC 5 230 mA active 90 mA standby Power available at I O connector 4 65 to 5 25 VDC at 250 mA Note You can save current by using the NI DAQ power down utility when your DAQCard is not in use Physical PC Card type Type II I O connector PCMCIA 68 position female connector Environment Operating temperature 0 to 55 C Storage temperature 55 to 150 C Relative...

Страница 96: ...ndix describes the connectors on the optional cables for the DAQCard E Series cards Figure B 1 shows the pin assignments for the 68 pin AI connector This connector is available when you use the PSHR68 68M or PR6868 cable assemblies with the DAQCard AI 16E 4 or DAQCard AI 16XE 50 This document was created with FrameMaker 4 0 4 ...

Страница 97: ...ved ACH15 AIGND ACH6 ACH13 AIGND ACH4 AIGND ACH3 ACH10 AIGND ACH1 ACH8 DGND PFI8 GPCTR0_SOURCE PFI7 STARTSCAN GPCTR1_OUT PFI4 GPCTR1_GATE PFI3 GPCTR1_SOURCE PFI2 CONVERT DGND DGND DGND EXTSTROBE SCANCLK DIO3 DIO7 DIO2 DGND DIO5 DIO0 DGND Reserved Reserved Reserved ACH7 ACH14 AIGND ACH5 ACH12 AISENSE ACH11 AIGND ACH2 ACH9 AIGND ACH0 1 35 2 36 3 37 4 38 5 39 6 40 7 41 8 42 9 43 10 44 11 45 12 46 13 ...

Страница 98: ...R0_OUT PFI8 GPCTR0_SOURCE PFI6 WFTRIG GPCTR1_OUT PFI3 GPCTR1_SOURCE PFI1 TRIG2 EXTSTROBE 5 V DGND DIO3 DIO2 DIO1 DIO0 Reserved Reserved AISENSE ACH7 ACH6 ACH5 ACH4 ACH3 ACH2 ACH1 ACH0 AIGND FREQ_OUT PFI7 STARTSCAN PFI5 UPDATE PFI2 CONVERT PFI0 TRIG1 SCANCLK 5 V PFI9 GPCTR0_GATE PFI4 GPCTR1_GATE DIO7 DIO6 DIO5 DIO4 DGND Reserved Reserved ACH15 ACH14 ACH13 ACH12 ACH11 ACH10 ACH9 ACH8 AIGND 49 50 47 ...

Страница 99: ...tion section Configuration 1 Do I need to use my PCMCIA configuration utility to configure the National Instruments PC Cards No We recommend that you do not configure our PC Cards using PC Card Control or an equivalent PC Card configuration utility Use the configuration utilities included with the NI DAQ driver software to properly configure your DAQCard The appropriate utility is the NI DAQ Confi...

Страница 100: ...nse For information about how to locate an interrupt that is free to be used refer to question 4 in the Resources section 3 Is there a way I can conserve power on my PC Card when it is not in use Yes If you are using NI DAQ for PC compatibles version 4 8 0 or later a utility called DAQPOWER EXE will switch National Instruments PC Cards between normal mode and power down mode Run DAQPOWER from the ...

Страница 101: ... space save the configuration If there is a conflict the configuration utility will report an error describing the conflict 4 How do I find usable interrupt levels Some utilities such as MSD EXE will scan the system and display information about what is using hardware interrupts If you have such a utility you can run it to determine what interrupts Card Services can use Card Services needs an inte...

Страница 102: ...ke the necessary changes to provide Card Services with the memory needed We suggest that you use the minimum amount of memory for Card Services namely 4 to 12 kB which frees more memory for the memory manager Resource Conflicts 1 How do I resolve conflicts between my memory manager and Card Services Card Services can usually use memory space that is not being used for real RAM on the system Even w...

Страница 103: ...ups Analog input two 24 bit two 16 bit counters Analog output three 24 bit one 16 bit counters General purpose counter timer functions two 24 bit counters The groups can be configured independently with timing resolutions of 50 ns or 10 µs With the DAQ STC you can interconnect a wide variety of internal timing signals to other internal blocks The interconnection scheme is quite flexible and comple...

Страница 104: ...n for this information 2 What version of NI DAQ must I have to program my DAQCard E Series card You must have version 4 9 0 or higher for the DAQCard AI 16E 4 and DAQCard AI 16XE 50 and version 4 6 1 or higher for all other DAQCard E Series cards 3 What is the best way to test my DAQCard without having to program the DAQCard If you are using Windows the NI DAQ Configuration Utility formerly WDAQCO...

Страница 105: ... sampled at a different rate NI DAQ features a function called SCAN_Sequence_Setup which allows for multirate scanning of your analog input channels Refer to the NI DAQ Function Reference Manual for PC Compatibles for more details Timing and Digital I O 1 What types of triggering can be implemented in hardware on my DAQCard E Series card Digital triggering is supported by hardware on every DAQCard...

Страница 106: ...many differences in the counters between the DAQCard E Series and other boards the counter numbers are different timebase selections are different the DAQ STC counters are 24 bit counters unlike the 16 bit counters on boards without the DAQ STC If you are using the NI DAQ language interface such as LabWindows CVI the answer is no the counter time applications that you wrote previously will not wor...

Страница 107: ... counter may have generated some spurious requests which the DMA controller may not satisfy because it has already transferred the required number of points 8 What are the PFIs and how do I configure these lines PFIs are Programmable Function Inputs These lines serve as connections to virtually all internal timing signals If you are using NI DAQ language interface LabWindows or LabWindows CVI use ...

Страница 108: ...own by setting the PWRDOWN bit in the PCMCIA Card Configuration and Status Register You can set the PWRDOWN bit by using the DAQPOWER utility that is shipped with NI DAQ Use DAQPOWER D to power down and DAQPOWER U to power up the DAQCard E Series cards Power down mode is specified to draw less than 100 mA from the 5 V supply 500 mW See the power consumption specifications in Appendix A for exact v...

Страница 109: ...g input and analog output can be fully calibrated Partially functional Draws negligible power CALDACs retain values and may be loaded but adjustments will not be detected in analog circuitry which is powered off Digital I O Functional Protected from 0 5 to 5 5 V Functional Protected from 0 5 to 5 5 V Counters Functional Initialize to undefined states Individual counters of the DAQ STC must be full...

Страница 110: ...ons we offer fax and telephone support through our technical support centers which are staffed by applications engineers Electronic Services National Instruments has BBS and FTP sites dedicated for 24 hour support with a collection of files and documents to answer most common customer questions From these sites you can also download the latest instrument drivers updates and example programs For re...

Страница 111: ...he technical support number for your country If there is no National Instruments office in your country contact the source from which you purchased your software to obtain support Telephone Fax Australia 03 9 879 9422 03 9 879 9179 Austria 0662 45 79 90 0 0662 45 79 90 19 Belgium 02 757 00 20 02 757 03 11 Canada Ontario 519 622 9310 Canada Quebec 514 694 8521 514 694 4399 Denmark 45 76 26 00 45 76...

Страница 112: ...__________________________________________________ ______________________________________________________________________________ National Instruments hardware product model __________ Revision ______________________ Configuration___________________________________________________________________ National Instruments software product ___________________________ Version ____________ Configuration__...

Страница 113: ... CVI or other ___________________ Software Version ______________________________________________________________ Other Products Computer Model ______________________________________________________________ Microprocessor________________________________________________________________ Clock Frequency ______________________________________________________________ Type of Video Board Installed______...

Страница 114: ...ribe the errors ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ______________________________________________________________________________ ____________________________________________________________________...

Страница 115: ...mbols degrees negative of or minus Ω ohms per percent plus or minus positive of or plus square root of 5 V 5 VDC source signal Prefix Meaning Value p pico 10 12 n nano 10 9 µ micro 10 6 m milli 10 3 k kilo 103 M mega 106 G giga 109 This document was created with FrameMaker 4 0 4 ...

Страница 116: ... digital input output AI analog input AIGATE analog input gate signal AIGND analog input ground signal AISENSE analog input sense signal AOGND analog output ground signal ASIC application specific integrated circuit B BBS bulletin board support BIOS basic input output system or built in operating system C C Celsius CalDAC calibration DAC CH channel CIS Card Information Structure cm centimeter ...

Страница 117: ...log DAC D A converter DAC0OUT analog channel 0 output signal DAC1OUT analog channel 1 output signal DAQ data acquisition DAQCard data acquisition card dB decibels DC direct current DGND digital ground signal DIFF differential DIO digital input output DMA direct memory access DNL differential nonlinearity DO digital output DOS disk operating system E EEPROM electrically erasable programmable read o...

Страница 118: ...utput signal ft feet G GPCTR0_GATE general purpose counter 0 gate signal GPCTR1_GATE general purpose counter 1 gate signal GPCTR0_OUT general purpose counter 0 output signal GPCTR1_OUT general purpose counter 1 output signal GPCTR0_SOURCE general purpose counter 0 clock source signal GPCTR1_SOURCE general purpose counter 1 clock source signal GPTR0_UP_DOWN general purpose counter 0 up down signal ...

Страница 119: ...utput IOH current output high IOL current output low IRQ interrupt request signal ISA Industry Standard Architecture L LED light emitting diode LSB least significant bit M m meter MB megabytes of memory MSB most significant bit N NC not connected internally NRSE nonreferenced single ended O OUT output signal ...

Страница 120: ...Gain Instrumentation Amplifier ppm parts per million pu pullup PWRDOWN power down signal R RAM random access memory REF reference rms root mean square RSE referenced single ended RTD resistive temperature device S s seconds S samples SCANCLK scan clock signal SCXI Signal Conditioning eXtensions for Instrumentation SE single ended inputs SISOURCE SI counter clock signal STARTSCAN start scan signal ...

Страница 121: ...THD total harmonic distortion tout output delay time TRIG trigger signal tsc source clock period tsp source pulse width TTL transistor transistor logic U UI update interval UISOURCE update interval counter clock signal UPDATE update signal V V volts VCC positive voltage supply VDC volts direct current VI virtual instrument VIH volts input high VIL volts input low ...

Страница 122: ...AQCard E Series User Manual G 8 National Instruments Corporation Vin volts in VO volts output VOH volts output high VOL volts output low Vref reference voltage W W watts WFTRIG waveform generation trigger signal ...

Страница 123: ...4 3 3 to 3 4 DAQCard AI 16XE 50 3 4 to 3 5 multichannel scanning considerations 3 7 to 3 8 power management modes table E 2 questions about D 3 selection considerations 3 6 to 3 7 signal connections 4 10 to 4 11 analog input specifications DAQCard AI 16E 4 A 1 to A 4 amplifier characteristics A 3 dynamic characteristics A 3 to A 4 input characteristics A 1 to A 2 stability A 4 transfer characteris...

Страница 124: ...4 34 input timing figure 4 33 output timing figure 4 34 counter power management modes table E 2 current saving A 12 C 2 customer communication xiv F 1 to F 2 D DAQCard clocks 3 14 DAQCard E Series See also hardware overview custom cabling 1 5 to 1 6 features 1 1 getting started 1 2 optional equipment 1 5 to 1 6 questions about D 1 to D 5 software programming choices LabVIEW and LabWindows CVI app...

Страница 125: ...ii xiii National Instruments documentation xiii xiv organization of manual xi xii related documentation xiv dynamic characteristic specifications DAQCard AI 16E 4 A 3 to A 4 DAQCard AI 16XE 50 A 10 E EEPROM storage of calibration constants 5 1 electronic support services F 1 to F 2 e mail support F 2 environment specifications DAQCard AI 16E 4 A 7 DAQCard AI 16XE 50 A 12 environmental noise avoidi...

Страница 126: ...o 4 43 ground referenced signal sources description 4 12 differential connections 4 15 recommended configuration figure 4 13 single ended connections NRSE configuration 4 19 to 4 20 H hardware installation 2 1 hardware overview analog input 3 2 to 3 8 dither 3 6 to 3 7 input mode 3 2 to 3 3 input polarity and range 3 3 to 3 5 multichannel scanning considerations 3 7 to 3 8 selection considerations...

Страница 127: ...oftware 2 2 to 2 3 typical configuration figure 2 2 unpacking DAQCard E Series 1 6 I O connectors 4 1 to 4 9 cable connectors for DAQCard E Series 1 6 exceeding maximum ratings warning 4 1 I O signal summary table DAQCard AI 16E 4 4 5 to 4 7 DAQCard AI 16XE 50 4 8 to 4 9 pin assignments figure 50 pin AI connector B 3 68 pin AI connector B 2 DAQCard AI 16E 4 and DAQCard AI 16XE 50 figure 4 2 signal...

Страница 128: ...l DAQCard AI 16E 4 table 4 6 DAQCard AI 16XE 50 table 4 9 description 4 5 PFIs programmable function inputs 4 24 connecting to external signal source warning D 5 overview 4 22 questions about D 5 signal routing 3 14 timing input connections 4 24 illustration 4 23 PGIA programmable gain instrumentation amplifier analog input connections 4 11 illustration 4 11 common mode signal rejection 4 20 diffe...

Страница 129: ...3 timing connections 4 26 illustration 4 26 settling time 3 7 to 3 8 signal connections analog input 4 10 to 4 11 digital I O 4 21 to 4 22 field wiring considerations 4 44 input configurations 4 12 to 4 20 common mode signal rejection 4 20 differential connections DIFF input configuration 4 14 floating signal sources 4 16 to 4 17 ground referenced signal sources 4 15 nonreferenced signal sources 4...

Страница 130: ...4 19 to 4 20 when to use 4 18 SISOURCE signal 4 35 software installation 2 2 to 2 3 software programming choices LabVIEW and LabWindows CVI application software 1 2 to 1 3 NI DAQ driver software 1 3 to 1 4 register level programming 1 4 specifications DAQCard AI 16E 4 analog input A 1 to A 4 amplifier characteristics A 3 dynamic characteristics A 3 to A 4 input characteristics A 1 to A 2 stability...

Страница 131: ...ignal 4 39 to 4 40 GPCTR1_UP_DOWN signal 4 42 to 4 43 programmable function input connections 4 24 questions about D 3 to D 5 timing I O connections figure 4 23 timing I O specifications DAQCard AI 16E 4 A 5 to A 6 DAQCard AI 16XE 50 A 11 to A 12 timing signal routing 3 13 to 3 14 CONVERT signal routing figure 3 13 DAQCard clocks 3 14 programmable function inputs 3 14 transfer characteristic speci...

Страница 132: ... 4 36 unipolar input DAQCard AI 16E 4 3 3 DAQCard AI 16XE 50 3 4 to 3 5 mixing bipolar and unipolar channels note 3 5 unpacking DAQCard E Series 1 6 V VCC signal DAQCard AI 16E 4 table 4 6 DAQCard AI 16XE 50 table 4 8 W Windows 95 configuring your PC Card note C 1 wiring considerations 4 44 ...

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