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NI 783xR User Manual - National Instruments

1. 24 V Measurement Category I Caution Do not use the NI 783xR for connection to signals in Measurement Categories II HI or IV Environmental The NI 783xR is intended for indoor use only Operating Environment NI 7830R NI 7831R 40 MHz or 80 MHz timebase 0 C to 55 C tested in accordance with IEC 60068 2 1 and IEC 60068 2 2 NI 7833R 40 MHz timebase 0 C to 55 C tested in accordance with IEC 60068 2 1 and IEC 60068 2 2 80 MHz timebase 0 C to 55 C except the following 0 C to 45 C when installed in an NI PXI 1000 B or NI PXI 101X tested in accordance with IEC 60068 2 1 and IEC 60068 2 2 NI 783xR User Manual A 8 ni com Appendix A Specifications Relative humidity range 10 to 90 noncondensing tested in accordance with IEC 60068 2 56 Altitude sanee e eto ventes 2 000 m at 25 C ambient temperature Storage Environment Ambient temperature range 20 C to 70 C tested in accordance with IEC 60068 2 1 and IEC 60068 2 2 Relative humidity range 596 to 9596 noncondensing tested in accordance with IEC 60068 2 56 yl Note Clean the device with a soft non metallic brush Make sure that the device is completely dry and free from contaminants before returning it to service Shock and Vibration for NI PXI 783xR Only Operat
2. Sodioa 0 9 9 20 SW1 SW2 SW3 O National Instruments Corporation Figure 2 12 Switch Location on the NI PXI 783xR 2 21 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR 9 Dg ah a 3 an ees 192980 192830 u SW1 SW2 SW3 Figure 2 13 Switch Location on the NI PCI 783xR ON 123 a Normal Operation Default b Prevent VI From Loading Figure 2 14 Switch Settings NI 783xR User Manual 2 22 ni com Chapter 2 Hardware Overview of the NI 783xR Complete the following steps to prevent a VI stored in flash memory from loading to the FPGA 1 Power off and unplug the PXI CompactPCI chassis or PCI computer 2 Remove the NI 783xR from the PXI CompactPCI chassis or PCI computer Move SWI to the ON position as shown in Figure 2 14b 4 Reinsert the NI 783xR into the PXI CompactPCI chassis or PCI computer Refer to the Installing the Hardware section of the Getting Started with the NI 783xR document for installation instructions 5 Plugin and power on the PXI CompactPCI chassis or PCI computer After completing this procedure a VI stored in flash memory does not load to the FPGA at power on You can use software to configure the NI 78
3. 1 t Input M Configuration Flash i Al DER Control KMS 1 e c 1 e 2 Al g 1 ii a o i 5 E o toe mm 8 m Input Mode Mux O AISENSE oO AIGND N Voltage Temperature User B 3 5 Reference Sensor Configurable 5zcaadress us 3 Calibration Las E eorr oco oo E FPGA on RIO Control Interface 5 2 Mux e l 8 c 1 2 emen Devices e 6 i Calibration x Oo pr 1 16 Bit DACs T ADAC i E i x4 Channels _ O Lee ew ee nns lt Digital 1 0 16 X E lt Digital 1 0 40 2 S PXI Local Bus NI PXI 783xR only RTSI Bus RTSI PXI Triggers Figure 2 1 NI 7830R Block Diagram National Instruments Corporation 2 1 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR seeded eendedeesuescememeuemeeddua Calibration i PS i Input Mux ACs 1 Configuration Al gt Control i N ji E 1 gt Instrumentation E Al m g o i B gt i 2 5 e tc IER x8 Channels P 5 a o is z Input Mode Mux Oo AISENSE User Q AIGND Voltage Temperature 7 o 5 mr Sensor Configurable saaaaaessr Bus 3 2 Calibration 1 FPGA on RIO Contro Interaga Address Data 5 E Mux Devices eros Q o Calibration x O lg S x8 C
4. 42 V Data transfers teet eer Interrupts programmed I O Accuracy Information Relative Absolute Accuracy Accuracy Noise Quantization Nominal Range V of Reading UV Absolute Resolution uV Accuracy Positive Negative Temp at Full Full Full 24 Offset Single Drift Scale Single Scale Scale Hours 1 Year UV Point Averaged C tmV Point Averaged 10 0 10 0 0 0496 0 0507 2542 1779 165 0 0005 7 78 2170 217 Note Accuracies are valid for measurements following an internal calibration Measurement accuracies are listed for operational temperatures within 1 C of internal calibration temperature and 10 C of external or factory calibration temperature Temp drift applies only if ambient is greater than 10 C of previous external calibration NI 783xR User Manual DC Transfer Characteristics INL tette res 3 LSB typ 6 LSB max I BIL I uit rena E a 1 0 to 42 0 LSB max No missing codes resolution 16 bits typ 15 bits min CMRR DC to 60 Hz ee 86 dB Dynamic Characteristics Bandwidth Small signal 3 dB 650 kHz Large signal 1 THD 55 kHz System noise 1 8 LSBuns including quantization A 2 ni com Appendix A Specifications Settling Time Accuracy Step Size 16 LSB 4LSB 2 LSB 20 0 V 7 5 us 10 3 us 40 us 2 0 V 2 7 us 4 1 us 5 1 us 02 V 1 7 us 2 9 us 3 6 us Crosstalk in n i nii
5. eee 2 6 O National Instruments Corporation V NI 783xR User Manual lama P E ts Differential Connection Considerations DIFF Input Mode Differential Connections for Ground Referenced Signal Sources Differential Connections for Nonreferenced or Floating Signal Sources sese Single Ended Connection Considerations ses Single Ended Connections for Floating Signal Sources RSE Input Mode etinm Her a ea E TERRE NRR ERR Rn Single Ended Connections for Grounded Signal Sources NRSE Input Mode erm eere Common Mode Signal Rejection Considerations eese Analog Output 5 Beet cti e pt ea caveat edo te e ein Connecting Analog Output Signals essere eene Digital VO itae eee o Connecting Digital I O Signals eese eene RTSL Trigger Bus ente treten o ueteris PXI Local Bus for NI PXI 783xR only s eeeseeseeeseeeeeeee enne eere enne Switch Settings 5d acsoseqeiiutepeetee n eroe ete ied ete Power Connections ur ise RE RR ERE e RR te te ceeds Field Wiring Considerations teet te te edo ter iere petentis Chapter 3 Calibration Loading Calibration Constant eese rennen eterne nenne Internal Calibrations ss eI nee a ee ir enc ER S External Calibration e ete retten eec tt ee teet pee ttes Appendix A Specifications Appendix B Connecting 1 0 Signals Appendix C Usi
6. National Instruments Corporation G 7 Glossary Random access memory The generic term for the read write memory that is used in computers RAM allows bits and bytes to be written to it as well as read from Various types of RAM are DRAM EDO RAM SRAM and VRAM The smallest signal increment that can be detected by a measurement system Resolution can be expressed in bits in proportions or in percent of full scale For example a system has 12 bit resolution one part in 4 096 resolution and 0 0244 of full scale Reconfigurable I O Root mean square Referenced single ended mode All measurements are made with respect to a common reference measurement system or a ground Also called a grounded measurement system Real time system integration bus The timing and triggering bus that connects multiple devices directly This allows for hardware synchronization across devices Seconds Samples Samples per second Used to express the rate at which a DAQ board samples an analog signal The manipulation of signals to prepare them for digitizing The voltage rate of change as a function of time The maximum slew rate of an amplifier is often a key specification to its performance Slew rate limitations are first seen as distortion at higher signal frequencies NI 783xR User Manual Glossary THD thermocouple TTL two s complement VDC VHDCI VI waveform NI 783xR User Manual Total harmonic dist
7. No Connect Al7 57 23 Al7 DIO21 56 22 DGND AISENSE 22 No Connect AISENSE 56 22 No Connect DIO20 55 21 DGND AOO 21 AOGNDO AOO 55 21 AOGNDO DIO19 54 20 DGND AO1 20 AOGND1 AO1 54 20 AOGND1 DIO18 53 19 DGND AO2 19 AOGND2 AO2 53 19 AOGND2 DIO17 52 18 DGND AO3 18 AOGND3 AO3 52 18 AOGND3 DIO16 51 17 DGND No Connect 17 AOGND4 AO4 51 17 AOGND4 DIO15 50 16 DGND No Connect 16 AOGND5 AO5 50 16 AOGND5 DIO14 49 15 DGND No Connect 15 AOGND6 AO6 49 15 AOGND6 DIO13 48 14 DGND No Connect 14 AOGND7 AO7 48 14 AOGND7 DIO12 47 13 DGND DIO15 13 DIO14 DIO15 47 13 DIO14 DIO11 46 12 DGND DIO138 12 DIO12 DIO13 46 12 DIO12 DIO10 45 11 DBND DIO11 11 DIO10 DIO11 45 11 DIO10 DIO9 44 10 DGND DIO9 10 DIO8 DIO9 44 10 DIO8 DIO8 43 9 DGND DIO7 9 DGND DIO7 43 9 DGND DIO7 42 8 DGND DIO6 8 DGND DIO6 42 8 DGND DIO6 41 7 DGND DIO5 7 DGND DIO5 41 7 DGND DIO5 40 6 DGND DIO4 6 DGND DIO4 40 6 DGND DIO4 39 5 DGND DIOS 5 DGND DIO3 39 5 DGND DIO3 38 4 DGND DIO2 4 DGND DIO2 38 4 DGND DIO2 37 3 DGND DIO1 3 DGND DIO1 37 3 DGND DIO1 36 2 DGND DIOO 2 DGND DIOO 36 2 DGND DIOO 35 1 DGND 5V 1 5V 5V 1 35 1 5V ET B NI 783xR DIO NI 7830
8. eese 1 25 Q Current drives ie eene 2 5 mA Protection Rte Ce Power on state ssssseeeee Dynamic Characteristics Settling time User configurable Short circuit to ground Accuracy Step Size 16 LSB 4LSB 2 LSB 20 0 V 6 0 us 6 2 us 7 2 us 2 0 V 2 2 us 2 0 us 3 8 us 0 2 V 1 5 us 2 6 us 3 6 us A 4 ni com Digital 1 0 Glitch energy at midscale transition Number of channels IEEE iet NIETSIIR 2 uu RES NITS33R 5 d Compatibility esses Digital logic levels Appendix A Specifications 10 V us 150 UVims DC to 1 MHz 200 mV for 3 us 56 96 96 TTL Level Input low voltage Vy Input high voltage Viz Output low voltage Voz where loj Lnax sink Output high voltage Vo where Igy Lmax source Min Max 0 0 V 0 8 V 2 0 V 5 5 V 0 4 V 2 4 V Maximum output current I SOUNCE ciegos T aac SINK cte Input leakage current Power on state eese Data transfers eerrrrrrrnnrnnnnnrrrrrrnnr Protection Input aee ent Output 2 2 orte O National Instruments Corporation A 5 5 0 mA 5 0 mA 10 uA Programmable by line Interrupts programmed I O 0 5 to 7 0 V Short circuit up to eight lines may be shorted at a time NI 783xR User Manual Appendix A Specifications Reconfigurable
9. Digital output Electrically erasable programmable read only memory ROM that can be erased with an electrical signal and reprogrammed Field Programmable Gate Array A configuration that is downloaded to the FPGA and that determines the functionality of the hardware An unwanted signal excursion of short duration that is usually unavoidable Hour Hardware in the loop Hertz G 4 National Instruments Corporation I O INL L LabVIEW LSB m max MIMO min MIO monotonicity mux O National Instruments Corporation G 5 Glossary Input output The transfer of data to from a computer system involving communications channels operator interface devices and or data acquisition and control interfaces Relative accuracy Laboratory Virtual Instrument Engineering Workbench LabVIEW is a graphical programming language that uses icons instead of lines of text to create programs Least significant bit Meter Maximum Multiple input multiple output Minimum Multifunction I O A characteristic of a DAC in which the analog output always increases as the values of the digital code input to it increase Multiplexer A switching device with multiple inputs that sequentially connects each of its inputs to its output typically at high speeds in order to measure several signals with a single analog input channel NI 783xR User Manual Glossary noise NRSE OUT PCI port ppm p
10. 39 gt low frequency signals RTSI Trigger Bus NI 783xR User Manual The NI 783xR can send and receive triggers through the RTSI trigger bus The RTSI bus provides eight shared trigger lines that connect to all the devices on the bus In PXI the trigger lines are shared between all the PXI slots in a bus segment In PCI the RTSI bus is implemented through a ribbon cable connected to the RTSI connector on each device that needs to access the RTSI bus You can use the RTSI trigger lines to synchronize the NI 783xR to any other device that supports RTSI triggers On the NI PCI 783xR the RTSI trigger lines are labeled RTSI TRIG lt 0 6 gt and RTSI OSC On the NI PXI 783xR the RTSI trigger lines are labeled PXI TRIG lt 0 7 gt In addition the NI PXI 783xR can use the PXI star trigger line to send or receive triggers from a device plugged into Slot 2 of the PXI chassis The PXI star trigger line on the NI PXI 783xR is PXI STAR The NI 783xR can configure each RTSI trigger line either as an input or an output signal Because each trigger line on the RTSI bus is connected in parallel to all the other RTSI devices on the bus only one device should drive a particular RTSI trigger line at a time For example if one NI PXI 783xR is configured to send out a trigger pulse on PXI TRIGO the remaining devices on that PXI bus segment must have PXI TRIGO configured as an input 2 18 ni com Chapter 2 Hardware Overview of the
11. Centimeter Complementary metal oxide semiconductor Common mode rejection ratio A measure of an instrument s ability to reject interference from a common mode signal usually expressed in decibels dB Any voltage present at the instrumentation amplifier inputs with respect to amplifier ground Refers to the core specification defined by the PCI Industrial Computer Manufacturer s Group PICMG Digital to analog Digital to analog converter An electronic device often an integrated circuit that converts a digital number into a corresponding analog voltage or current Data acquisition A system that uses the computer to collect receive and generate electrical signals Decibel The unit for expressing a logarithmic measure of the ratio of two signal levels dB 20log10 V1 V2 for signals in volts Direct current Digital ground signal Differential mode NI 783xR User Manual Glossary DIO DIO lt i gt DMA DNL DO E EEPROM F FPGA FPGA VI glitch NI 783xR User Manual Digital input output Digital input output channel signal Direct memory access A method by which data can be transferred to from computer memory from to a device or memory on the bus while the processor does something else DMA is the fastest method of transferring data to from computer memory Differential nonlinearity A measure in LSB of the worst case deviation of code widths from their ideal value of 1 LSB
12. DIFF AIGND lt i gt AIGND lt i gt See text for information on bias resistors NOT RECOMMENDED Al lt i gt Al C v v 1 lt i 1 Single Ended Sn Ground h N Referenced RSE AIGND Ground loop losses Vg are added to measured signal Al lt i gt Al lt i gt i Vi AISENSE D t Vi AISENSE D Single Ended Nonreferenced AGND NRSE a 7 VW See text for information on bias resistors AIGND lt i gt Figure 2 4 Summary of Analog Input Connections National Instruments Corporation 2 7 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR Differential Connection Considerations DIFF Input Mode NI 783xR User Manual In DIFF input mode the NI 783xR measures the difference between the positive and negative inputs DIFF input mode is ideal for measuring ground referenced signals from other devices When using DIFF input mode the input signal connects to the positive input of the instrumentation amplifier and its reference signal or return connects to the negative input of the instrumentation amplifier Use differential input connections for any channel that meets any of the following conditions e The input signal is low level less than 1 V e The leads connecting the signal to the NI 783xR are greater than 3 m 10 ft e The input signal requires a separate ground reference point or
13. Refer to ni com products or contact the sales office nearest to you for the most current cabling options Custom Cabling NI 783xR User Manual NI offers a variety of cables for connecting signals to the NI 783xR If you need to develop a custom cable a nonterminated shielded cable is available from NI The SHC68 NT S connects to the NI 783xR VHDCI connectors on one end of the cable The other end of the cable is not terminated This cable ships with a wire list identifying the wires that correspond to each NI 783xR pin Using this cable you can quickly connect the NI 783xR 1 8 ni com Chapter 1 Introduction signals that you need to the connector of your choice Refer to Appendix B Connecting I O Signals for the NI 783xR connector pinouts Safety Information The following section contains important safety information that you must follow when installing and using the NI 783xR Do not operate the NI 783xR in a manner not specified in this document Misuse of the NI 783xR can result in a hazard You can compromise the safety protection built into the NI 783xR if the NI 783xR is damaged in any way If the NI 783xR is damaged return it to NI for repair Do not substitute parts or modify the NI 783xR except as described in this document Use the NI 783xR only with the chassis modules accessories and cables specified in the installation instructions You must have all covers and filler panels installed during operation of
14. 000000 8000 Any input voltage OA x 10 0 V Input Modes The NI 783xR input mode is software configurable The input channels support three input modes differential DIFF referenced single ended RSE and nonreferenced single ended NRSE The selected input mode applies to all the input channels Table 2 2 describes the three input modes Table 2 2 Available Input Modes for the NI 783xR Input Mode Description DIFF When the NI 783xR is configured in DIFF input mode each channel uses two AI lines The positive input pin connects to the positive terminal of the onboard instrumentation amplifier The negative input pin connects to the negative input of the instrumentation amplifier RSE When the NI 783xR is configured in RSE input mode each channel uses only its positive AI pin This pin connects to the positive terminal of the onboard instrumentation amplifier The negative input of the instrumentation amplifier connects internally to the AI ground AIGND NRSE When the NI 783xR is configured in NRSE input mode each channel uses only its positive AI pin This pin connects to the positive terminal of the onboard instrumentation amplifier The negative input of the instrumentation amplifier on each AI channel connects internally to the AISENSE input pin National Instruments Corporation 2 3 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR Input Range The NI 783
15. 30 DGND DIO33 29130 NC DIO8 31 32 DGND DIO32 31 32 DGND DIO7 33 34 DGND DIO31 33 34 DGND DIO6 35 36 DGND DIO30 35136 DGND DIO5 37 38 DGND DIO29 371 38 DGND DIO4 39 40 DGND DIO28 39140 DGND DIO3 41 42 DGND DIO27 41 42 DGND DIO2 43 44 DGND DIO26 43144 DGND DIO1 45 46 DGND DIO25 45146 DGND DIOO 47 48 DGND DIO24 47148 DGND 5V 49 50 DGND 5V 49 50 DGND DIO 0 23 Connector DIO 24 39 Connector Pin Assignment Pin Assignment Figure B 4 Connector Pinouts when Using the NSC68 5050 Cable National Instruments Corporation B 7 NI 783xR User Manual Using the SCB 68 Shielded Connector Block This appendix describes how to connect input and output signals to the NI 783xR with the SCB 68 shielded connector block The SCB 68 has 68 screw terminals for I O signal connections To use the SCB 68 with the NI 783xR you must configure the SCB 68 as a general purpose connector block Refer to Figure C 1 for the general purpose switch configuration S5 S4 S3 S1 S2 Figure C 1 General Purpose Switch Configuration for the SCB 68 Terminal Block After configuring the SCB 68 switches you can connect the I O signals to the SCB 68 screw terminals Refer to Appendix B Connecting I O Signals for the connector pin assignments for the NI 783xR After connecting I O signals to the SCB 68 screw terminals you can connect the SCB 68 to the NI 783xR with the SH68 C68 S shielde
16. AO channels and 96 DIO lines A user reconfigurable FPGA Field Programmable Gate Array controls the digital and analog I O lines on the NI 783xR The FPGA on the R Series device allows you to define the functionality and timing of the device You can change the functionality of the FPGA on the R Series device in LabVIEW using the LabVIEW FPGA Module to create and download a custom virtual instrument VI to the FPGA Using the FPGA Module you can graphically design the timing and functionality of the R Series device If you only have LabVIEW but not the FPGA Module you cannot create new FPGA VIs but you can create VIs that run on Windows or a LabVIEW Real Time RT target to control existing FPGA VIs Some applications require tasks such as real time floating point processing or datalogging while performing I O and logic on the R Series device You can use the LabVIEW Real Time Module to perform these additional applications while communicating with and controlling the R Series device The R Series device contains flash memory to store a startup VI for automatic loading of the FPGA when the system is powered on National Instruments Corporation 1 1 NI 783xR User Manual Chapter 1 Introduction The NI 783xR uses the Real Time System Integration RTSI bus to easily synchronize several measurement functions to a common trigger or timing event The NI PCI 783xR accesses the RTSI bus through a RTSI cable connected between devic
17. B Connecting 1 0 Signals Figure B 3 shows the connector pinouts when using the NSC68 262650 cable NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC NC DIO15 NC DIO14 NC DIO13 NC DIO12 NC AO0 112 NC AI0 1 2 Alo DIO11 NC AOGNDO 3 4 NC AIGNDO 3 4 Al DIO10 NC AO1 5 6 AOGND1 Ali 5 6 AIGND1 DIO9 NC AC2 7 8 NC Al2 7 8 Al2 DIO8 NC AOGND2 9 10 NC AIGND2 9 10 Al3 DIO7 NC AOS 11 12 AOGND3 Al3 11 12 AIGND3 DIO6 DGND AO4 13 14 NC Al4 18 14 Al4 DIO5 DGND AOGND4 151 16 NC AIGND4 15 16 Al5 DIO4 DGND AOS 17 18 AOGND5 Al5 17 18 AIGND5 DIO3 DGND AO6 19 20 NC Al6 19 20 Al6 DIO2 DGND AOGND6 21 22 NC AIGND6 21 22 Al7 DIO1 DGND AO7 23 24 AOGND7 Al7 23 24 AIGND7 DIOO DGND NC 25 26 NC AISENSE 25 26 NC 45V DGND AO 0 7 Connector Al 0 7 Connector DIO 0 15 Connector Pin Assignment Pin Assignment Pin Assignment Figure B 3 Connector Pinouts when Using NSC68 262650 Cable The NSC68 5050 cable connects the signals on the NI 783xR DIO connectors directly to SSR backplanes for digital signal conditioning This cable has a 68 pin male VHDCI connector on one end that plugs into the NI 783xR DIO connectors The other end of this cable provides two 50 pin female headers You can plug each of these 50 pin heade
18. NI 783xR A Caution Do not drive the same RTSI trigger bus line with the NI 783xR and another device simultaneously Such signal driving can damage both devices NI is not liable for any damage resulting from such signal driving For more information on using and configuring triggers select Help Search the LabVIEW Help in LabVIEW to view the LabVIEW Help Refer to the PXI Hardware Specification Revision 2 1 and PXI Software Specification Revision 2 1 at www pxisa org for more information about PXI triggers PXI Local Bus for NI PXI 783xR only The NI PXI 783xR can communicate with other PXI devices using the PXI local bus The PXI local bus is a daisy chained bus that connects each PXI peripheral slot with its adjacent peripheral slot on either side For example the right local bus lines from a PXI peripheral slot connect to the left local bus lines of the adjacent slot on the right Each local bus is 13 lines wide All of these lines connect to the FPGA on the NI PXI 783xR The PXI local bus right lines on the NI PXI 783xR are PXI LBR lt 0 12 gt The PXI local bus left lines on the NI PXI 783xR are PXI LBLSTAR lt 0 12 gt The NI PXI 783xR can configure each PXI local bus line either as an input or an output signal Only one device can drive the same physical local bus line at a time For example if the NI PXI 783xR is configured to drive a signal on PXI LBR 0 the device in the slot immediately to the right must have its PXI LBLSTA
19. a reasonable distance if they run in parallel or run the lines at right angles to each other e Donot run signal lines through conduits that also contain power lines e Protect signal lines from magnetic fields caused by electric motors welding equipment breakers or transformers by running them through special metal conduits Refer to the NI Developer Zone tutorial Field Wiring and Noise Considerations for Analog Signals at ni com zone for more information 2 24 ni com Calibration Calibration is the process of determining and or adjusting the accuracy of an instrument to minimize measurement and output voltage errors On the NI 783xR onboard calibration DACs CalDACs correct these errors Because the analog circuitry handles calibration the data read from the AI channels or written to the AO channels in the FPGA VI is already calibrated Three levels of calibration are available for the NI 783xR to ensure the accuracy of its analog circuitry The first level loading calibration constants is the fastest easiest and least accurate The intermediate level internal calibration is the preferred method of assuring accuracy in your application The last level external calibration is the slowest most difficult and most accurate Loading Calibration Constants The NI 783xR is factory calibrated before shipment at approximately 25 C to the levels indicated in Appendix A Specifications The onboard nonvolatile fl
20. device use an external reference several times more accurate than the device itself For more information on externally calibrating your NI 783xR device refer to the NI 783xR Calibration Procedure found on ni com manuals NI 783xR User Manual 3 2 ni com Specifications Analog Input This appendix lists the specifications of the NI 783xR These specifications are typical at 25 C unless otherwise noted Input Characteristics Number of channels NI 7830R NI 7831R NI 7833R Input modes Type of ADC Resolution Conversion time Maximum sampling rate Input impedance Powered on Powered off Overload Input signal range Input bias current Input offset current Input coupling National Instruments Corporation A 1 DIFF RSE NRSE software selectable selection applies to all channels Successive approximation 16 bits 1 in 65 536 4 us 200 kS s per channel 10 GQ in parallel with 100 pF 4 KQ min 4 kQ min 10 V 2 nA 1 nA DC NI 783xR User Manual Appendix A Specifications Maximum working voltage signal common mode Inputs should remain within 12 V of ground Overvoltage protection
21. following standard 68 pin screw terminal blocks SCB 68 CB 68LP CB 68LPR TBX 68 O National Instruments Corporation 1 7 NI 783xR User Manual Introduction Chapter 1 Introduction Table 1 2 Cables and Accessories Continued NI 783xR Cable Cable Description Connector Accessories NSC68 262650 Non shielded cable connects MIO only 26 pin headers can connect from 68 pin VHDCI male to the following 5B connector to two 26 pin backplanes for analog signal female headers plus one conditioning 50 pin female header The 5B08 8 channel pinout of these headers allows for direct connection 5BOI 16 channel to 5B backplanes for analog 50 pin header can connect to signal conditioning and SSR the following SSR backplanes for digital signal backplanes for digital signal conditioning conditioning e 8 channel backplane 16 channel backplane 32 channel backplane NSC68 5050 Non shielded cable connects DIO only 50 pin headers can connect from 68 pin VHDCI male connector to two 50 pin female headers The pinout of these headers allows for direct connection to SSR backplanes for digital signal conditioning to the following SSR backplanes for digital signal conditioning 8 channel backplane 16 channel backplane 32 channel backplane Refer to Appendix B Connecting I O Signals for more information about using these cables and accessories to connect I O signals to the NI 783xR
22. for more information about these input modes If you have a grounded source do not reference the signal to AIGND You can avoid this reference by using DIFF or NRSE input modes National Instruments Corporation 2 5 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR Types of Signal Sources When configuring the input channels and making signal connections you must first determine whether the signal sources are floating or ground referenced The following sections describe these two signal types Floating Signal Sources A floating signal source is not connected to the building ground system but instead has an isolated ground reference point Some examples of floating signal sources are outputs of transformers thermocouples battery powered devices optical isolator outputs and isolation amplifiers An instrument or device that has an isolated output is a floating signal source You must connect the ground reference of a floating signal to the NI 783xR AIGND through a bias resistor to establish a local or onboard reference for the signal Otherwise the measured input signal varies as the source floats out of the common mode input range Ground Referenced Signal Sources Input Modes A ground referenced signal source is connected to the building system ground so it is already connected to a common ground point with respect to the NI 783xR assuming that the computer is plugged into the same power system Instrumen
23. is still compatible as long as those pins on the sub bus are disabled by default and are never enabled Caution Damage can result if the J2 lines are driven by the sub bus NI 783xR User Manual 1 2 ni com Chapter 1 Introduction Table 1 1 Pins Used by the NI PXI 783xR NI PXI 783xR Signal PXI Pin Name PXI J2 Pin Number PXI Trigger lt 0 7 gt PXI Trigger lt 0 7 gt A16 A17 A18 B16 B18 C18 E16 E18 PXI Clock 10 MHz PXI Clock 10 MHz E17 PXI Star Trigger PXI Star Trigger D17 LBLSTAR lt 0 12 gt LBL lt 0 12 gt Al A19 C1 C19 C20 D1 D2 D15 D19 El E2 E19 E20 LBR lt 0 12 gt LBR lt 0 12 gt A2 A3 A20 A21 B2 B20 C3 C21 D3 D21 E3 E15 E21 Overview of Reconfigurable I O This section explains reconfigurable I O and describes how to use the LabVIEW FPGA Module to build high level functions in hardware Refer to Chapter 2 Hardware Overview of the NI 783xR for descriptions of the I O resources on the NI 783xR Reconfigurable 1 0 Concept The NI 783xR is based on a reconfigurable FPGA core surrounded by fixed I O resources for analog and digital input and output You can configure the behavior of the reconfigurable FPGA to match the requirements of the measurement and control system You can implement this user defined behavior as an FPGA VI to create an application specific I O device Flexible Functionality Flexible functionality allows the NI 783xR to match indiv
24. level This category refers to measurements on hard wired equipment such as equipment in fixed installations distribution boards and circuit breakers Other examples are wiring including cables bus bars junction boxes switches socket outlets in the fixed installation and stationary motors with permanent connections to fixed installations Measurement Category IV Measurements performed at the primary electrical supply installation 1 000 V Examples include electricity meters and measurements on primary overcurrent protection devices and on ripple control units 1 Measurement categories also referred to as installation categories are defined in electrical safety standard IEC 61010 1 Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation 3 MAINS is defined as a hazardous live electrical supply system that powers equipment Suitably rated measuring circuits can be connected to the MAINS for measuring purposes NI 783xR User Manual 1 10 ni com Hardware Overview of the NI 783xR This chapter presents an overview of the hardware functions and T O connectors on the NI 783xR Figure 2 1 shows a block diagram for the NI 7830R Figure 2 2 shows a block diagram for the NI 7831R 7833R
25. one DIO connector for a total of 56 DIO lines The NI 7831R 7833R has one MIO and two DIO connectors for a total of 96 DIO lines Refer to Figure B 1 NI 783xR Connector Locations and Figure B 2 NI 783xR I O Connector Pin Assignments for the connector locations and the I O connector pin assignments on the NI 783xR The DIO lines on the NI 783xR are TTL compatible When configured as inputs they can receive signals from 5 V TTL 3 3 V LVTTL 5 V CMOS and 3 3 V LVCMOS devices When configured as outputs they can send signals to 5 V TTL 3 3 V LVTTL and 3 3 V LVCMOS devices Because the digital outputs provide a nominal output swing of 0 to 3 3 V 3 3 V TTL the DIO lines cannot drive 5 V CMOS logic levels To interface to 5 V CMOS devices you must provide an external pull up resistor to 5 V This resistor pulls up the 3 3 V digital output from the NI 783xR to 5 V CMOS logic levels Refer to Appendix A Specifications for detailed DIO specifications Caution Exceeding the maximum input voltage ratings listed in Table B 2 NI 783xR I O Signal Summary can damage the NI 783xR and the computer NI is not liable for any damage resulting from such signal connections UN Caution Do not short the DIO lines of the NI 783xR directly to power or to ground Doing so can damage the NI 783xR by causing excessive current to flow through the DIO lines NI 783xR User Manual You can connect multiple NI 783xR digital output lines in parallel to p
26. 006 National Instruments Corporation All rights reserved Important Information Warranty The NI 7830R 7831R 7833R is warranted against defects in materials and workmanship for a period of one year from the date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace equipment that proves to be defective during the warranty period This warranty includes parts and labor The media on which you receive National Instruments software are warranted not to fail to execute programming instructions due to defects in materials and workmanship for a period of 90 days from date of shipment as evidenced by receipts or other documentation National Instruments will at its option repair or replace software media that do not execute programming instructions if National Instruments receives notice of such defects during the warranty period National Instruments does not warrant that the operation of the software shall be uninterrupted or error free A Return Material Authorization RMA number must be obtained from the factory and clearly marked on the outside of the package before any equipment will be accepted for warranty work National Instruments will pay the shipping costs of returning to the owner parts which are covered by warranty National Instruments believes that the information in this document is accurate The document has been carefully reviewed for technical accuracy In the ev
27. 3xR if necessary To return to the defaults of loading from flash memory repeat the previous procedure but return SW1 to the OFF position in step 3 You can use this switch to enable disable the ability to load from flash memory In addition to this switch you must configure the NI 783xR with the software to autoload an FPGA VI iyi Note When the NI 783xR is powered on with SW I in the ON position the analog circuitry does not return properly calibrated data Move the switch to the ON position only while you are using software to reconfigure the NI 783xR for the desired power up behavior Afterward return SW1 to the OFF position Power Connections Two pins on each I O connector supply 5 V from the computer power supply using a self resetting fuse The fuse resets automatically within a few seconds after the overcurrent condition is removed The 5V pins are referenced to DGND and can power external digital circuitry The NI 783xR has the following power rating 4 50 to 45 25 VDC 250 mA max per 5V pin N Caution Do not connect the 5V power pins directly to analog or digital ground or to any other voltage source on the NI 783xR or any other device under any circumstance Doing so can damage the NI 783xR and the computer NI is not liable for damage resulting from such a connection National Instruments Corporation 2 23 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR Field Wiring Considerations NI 78
28. 3xR User Manual Environmental noise can seriously affect the measurement accuracy of the device if you do not take proper care when running signal wires between signal sources and the device The following recommendations mainly apply to AI signal routing to the device They also apply to signal routing in general Take the following precautions to minimize noise pickup and maximize measurement accuracy e Use differential AI connections to reject common mode noise e Use individually shielded twisted pair wires to connect AI signals to the device With this type of wire the signals attached to the positive and negative inputs are twisted together and then covered with a shield You then connect this shield only at one point to the signal source ground This kind of connection is required for signals traveling through areas with large magnetic fields or high electromagnetic interference e Route signals to the device carefully Keep cabling away from noise sources The most common noise source in a PXI DAQ system is the video monitor Keep the monitor and the analog signals as far apart as possible Use the following recommendations for all signal connections to the NI 783xR e Separate NI 783xR signal lines from high current or high voltage lines These lines can induce currents in or voltages on the NI 783xR signal lines if they run in parallel paths at a close distance To reduce the magnetic coupling between lines separate them by
29. About the NI7S3LR RERA TE elus 1 1 Using PXI with Conip ctPCl iret e ete e a aii 1 2 Overview of Reconfigurable I O sess 1 3 Reconfigurable I O Concept eese nennen 1 3 Flexible Functionality e neenon 1 3 User Defined I O Resources esee 1 4 Device Embedded Logic and Processing esses 1 4 Reconfigurable I O Architecture esee 1 4 Reconfigurable I O Applications eese 1 5 Software Development visum eet t e Re eret noa e Rte Ee tee ete 1 5 LabVIEW FPGA Module tiet P teet eese tis 1 5 LabVIEW Real Time Module eese eee 1 6 Cables and Optional Equipment eese eere 1 7 Custom Cabling tem Ree e RE PIRE ERE MEE Se LEER 1 8 Safety Information etie o t eee epe ee E i OP Le pei si 1 9 Chapter 2 Hardware Overview of the NI 783xR NE 7830R OV6EtVIEW 5 Ebro erm D e Re HRS 2 2 NI 7831R 7833R OVerVIeW 4 totem neo rp pee e edere ti testes 2 2 Analog Input serienr tetra eene eem ioa ee rd one e es 2 2 Input Modes E ed Reate 2 3 Hnc M qpeagenest 2 4 Connecting Analog Input Signals soronoonrrnrnvnrrvrrvnnrnrrvvnrnrrennrvrnrvernvnrnnrvrernasvverveveresnere 2 4 Types of Signal SourceS uran ganer ete OE Hn te RENTES 2 6 Floating Signal Sources eese eese tette nete E tenente 2 6 Ground Referenced Signal Sources
30. B Connecting 1 0 Signals Figure B 2 shows the I O connector pin assignments for the I O connectors on the NI 783xR The DIO connector pin assignment applies to connector 1 on the NI 7830R and connectors lt 1 2 gt on the NI 7831R 7833R DIO39 68 34 DIO38 Al0 34 Alo AIO 68 34 AIO DIO37 67 33 DIO36 AIGNDO 33 AIGND1 AIGNDO 67 33 AIGND1 DIO35 66 32 DIO34 Al1 32 Al1 Ali 66 32 Alt DIO33 65 31 DI032 Al2 31 AI2 Al2 65 31 Al2 DIO31 64 30 DIO30 AIGND2 30 AIGND3 AIGND2 64 30 AIGND3 DIO29 63 29 DIO28 Al3 29 AI3 AI3 63 29 Al3 DIO27 62 28 5V No Connect 28 No Connect Al4 62 28 Al4 DIO26 61 27 5V AIGND4 27 AIGND5 AIGND4 61 27 AIGNDS DIO25 60 26 DGND No Connect 26 No Connect Al5 60 26 Al5 DIO24 59 25 DGND No Connect 25 No Connect Al6 59 25 Al6 DIO23 58 24 DGND AIGND6 24 AIGND7 AIGND6 58 24 AIGND7 DIO22 57 23 DGND No Connect 23
31. FPGA Calibration NI 783xR User Manual Number of logic slices NI7830R nem 5 120 NE7831R ince 5 120 NI 7833R iioii 14 336 Equivalent number of logic cells NIT7830R tes 11 520 INI 7831R Lennart 11 520 NIT7833RZ 5 44 dades 32 256 Available embedded RAM NE7830R recette tee 81 920 bytes NI 7831R eee 81 920 bytes NIYS3IIR mene 196 608 bytes Tammeb ase uu deme here 40 80 120 160 or 200 MHz Timebase reference sources NIPCIETS83XR mete Onboard clock only NI PXI 783xR ee Onboard clock phase locked to PXI 10 MHz clock Timebase accuracy Onboard clock 100 ppm 250 ps jitter Phase locked to PXI 10 MHz Clock NI PXI 783xR only Adds 350 ps jitter 300 ps skew Additional frequency dependent jitter 40 MHZ eene None 80 MHZ iet dts 400 ps 120 MHZ itta tcs 720 ps 160 MHZ iter 710 ps 200 MHZ vredens 700 ps Recommended warm up time 15 minutes Calibration interval s year A 6 ni com Appendix A Specifications Onboard calibration reference DC level enini trt 5 000 V 43 5 mV actual value stored in flash memory Temperature coefficient 5 ppm C max Long term stability 20 ppm 1 000 h 3 Note Refer to Calibration Certificates at ni com calibration to generate a calibration certificate for t
32. NJURY AND DEATH SHOULD NOT BE RELIANT SOLELY UPON ONE FORM OF ELECTRONIC SYSTEM DUE TO THE RISK OF SYSTEM FAILURE TO AVOID DAMAGE INJURY OR DEATH THE USER OR APPLICATION DESIGNER MUST TAKE REASONABLY PRUDENT STEPS TO PROTECT AGAINST SYSTEM FAILURES INCLUDING BUT NOT LIMITED TO BACK UP OR SHUT DOWN MECHANISMS BECAUSE EACH END USER SYSTEM IS CUSTOMIZED AND DIFFERS FROM NATIONAL INSTRUMENTS TESTING PLATFORMS AND BECAUSE A USER OR APPLICATION DESIGNER MAY USE NATIONAL INSTRUMENTS PRODUCTS IN COMBINATION WITH OTHER PRODUCTS IN A MANNER NOT EVALUATED OR CONTEMPLATED BY NATIONAL INSTRUMENTS THE USER OR APPLICATION DESIGNER IS ULTIMATELY RESPONSIBLE FOR VERIFYING AND VALIDATING THE SUITABILITY OF NATIONAL INSTRUMENTS PRODUCTS WHENEVER NATIONAL INSTRUMENTS PRODUCTS ARE INCORPORATED IN A SYSTEM OR APPLICATION INCLUDING WITHOUT LIMITATION THE APPROPRIATE DESIGN PROCESS AND SAFETY LEVEL OF SUCH SYSTEM OR APPLICATION Compliance Compliance with FCC Canada Radio Frequency Interference Regulations Determining FCC Class The Federal Communications Commission FCC has rules to protect wireless communications from interference The FCC places digital electronics into two classes These classes are known as Class A for use in industrial commercial locations only or Class B for use in residential or commercial locations All National Instruments NI products are FCC Class A products Depending on where it is operated this Class A product could be
33. R Common Mode Signal Rejection Considerations Analog Output Figure 2 5 and Figure 2 8 show connections for signal sources that are already referenced to some ground point with respect to the NI 783xR In these cases the instrumentation amplifier can reject any voltage caused by ground potential differences between the signal source and the device With differential input connections the instrumentation amplifier can reject common mode noise pickup in the leads connecting the signal sources to the device The instrumentation amplifier can reject common mode signals when V and V input signals are both within their specified input ranges Refer to Appendix A Specifications for more information about input ranges The bipolar output range of the NI 783xR AO channels is fixed at 10 V Some applications require that the AO channels power on to known voltage levels To set the power on levels you can configure the NI 783xR to load and run a VI when the system powers on The VI can set the AO channels to the desired voltage levels The VI interprets data written to the DAC in two s complement format Table 2 3 shows the ideal AO voltage generated for a given input code Table 2 3 Ideal Output Voltage and Input Code Mapping Input Code Hex Output Description AO Voltage Two s Complement Full scale range 1 LSB 9 999695 7FFF Full scale range 2 LSB 9 999390 7FFE Midscale 0 000000 0000 Negative f
34. R You can use this signal for a general analog ground tie point to the NI 783xR if necessary Connection of AI signals to the NI 783xR depends on the input mode of the AI channels you are using and the type of input signal source With different input modes you can use the instrumentation amplifier in different ways Figure 2 3 shows a diagram of the NI 783xR instrumentation amplifier NI 783xR User Manual 2 4 ni com Chapter 2 Hardware Overview of the NI 783xR Instrumentation Amplifier Measured Voltage Vin Ving 7 Vind Figure 2 3 NI 783xR Instrumentation Amplifier The instrumentation amplifier applies common mode voltage rejection and presents high input impedance to the AI signals connected to the NI 783xR Input multiplexers on the device route signals to the positive and negative inputs of the instrumentation amplifier The instrumentation amplifier converts two input signals to a signal that is the difference between the two input signals The amplifier output voltage is referenced to the device ground The NI 783xR 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 NI 783xR If you have a floating source reference the signal to ground by using RSE input mode or the DIFF input mode with bias resistors Refer to the Differential Connections for Nonreferenced or Floating Signal Sources section of this chapter
35. R 0 line configured as an input N Caution Do not drive the same PXI local bus line with the NI PXI 783xR and another device simultaneously Such signal driving can damage both devices NI is not liable for any damage resulting from such signal driving The NI PXI 783xR local bus lines are only compatible with 3 3 V signaling LVTTL and LVCMOS levels AN Caution Do not enable the local bus lines on an adjacent device if the device drives anything other than 0 3 3V LVTTL signal levels on the NI PXI 783xR Enabling the lines in this way can damage the NI PXI 783xR NI is not liable for any damage resulting from enabling such lines O National Instruments Corporation 2 19 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR The left local bus lines from the left peripheral slot of a PXI backplane Slot 2 are routed to the star trigger lines of up to 13 other peripheral slots in a two segment PXI system This configuration provides a dedicated delay matched trigger signal between the first peripheral slot and the other peripheral slots for precise trigger timing signals For example as shown in Figure 2 11 an NI PXI 783xR in Slot 2 can send an independent trigger signal to each device plugged into Slots lt 3 15 gt using the PXI LBLSTAR lt 0 12 gt Each device receives its trigger signal on its own dedicated star trigger line AN Caution Do not configure the NI 783xR and another device to drive the same physical star tri
36. R MIO NI 7831R 7833R MIO Connector Pin Assignment Connector Pin Assignment Connector Pin Assignment Figure B 2 NI 783xR 1 0 Connector Pin Assignments To access the signals on the I O connectors you must connect a cable from the I O connector to a signal accessory Plug the small VHDCI connector end of the cable into the appropriate I O connector and connect the other end of the cable to the appropriate signal accessory NI 783xR User Manual B 2 ni com Appendix B Connecting 1 0 Signals Table B 1 1 0 Connector Signal Descriptions Signal Name Reference Direction Description 45V DGND Output 5 VDC Source These pins supply 5 V from the computer power supply using a self resetting 1 A fuse No more than 250 mA should be pulled from a single pin AI lt 0 7 gt AIGND Input Positive input for Analog Input channels 0 through 7 AI lt 0 7 gt AIGND Input Negative input for Analog Input channels 0 through 7 AIGND Analog Input Ground These pins are the reference point for single ended measurements in RSE configuration and the bias current return point for differential measurements All three ground references AIGND AOGND and DGND are connected to each other on the NI 783xR AISENSE AIGND Input Analog Input Sense This pin serves as the reference node for AI lt 0 7 gt when the device is configured for NRSE mode AO lt 0 7 gt AOGND Output Analog Output channels 0 through 7 Eac
37. Reconfigurable 1 0 NI 783xR User Manual Reconfigurable 1 0 Devices for PCI PXI CompactPCI Bus Computers June 2006 NATIONAL 370489D 01 D INSTRUMENTS Worldwide Technical Support and Product Information ni com National Instruments Corporate Headquarters 11500 North Mopac Expressway Austin Texas 78759 3504 USA Tel 512 683 0100 Worldwide Offices Australia 1800 300 800 Austria 43 0 662 45 79 90 0 Belgium 32 0 2 757 00 20 Brazil 55 11 3262 3599 Canada 800 433 3488 China 86 21 6555 7838 Czech Republic 420 224 235 774 Denmark 45 45 76 26 00 Finland 385 0 9 725 725 11 France 33 0 1 48 14 24 24 Germany 49 0 89 741 31 30 India 91 80 41190000 Israel 972 0 3 6393737 Italy 39 02 413091 Japan 81 3 5472 2970 Korea 82 02 3451 3400 Lebanon 961 0 1 33 28 28 Malaysia 1800 887710 Mexico 01 800 010 0793 Netherlands 31 0 348 433 466 New Zealand 0800 553 322 Norway 47 0 66 90 76 60 Poland 48 22 3390150 Portugal 351 210 311 210 Russia 7 095 783 68 51 Singapore 1800 226 5886 Slovenia 386 3 425 4200 South Africa 27 0 11 805 8197 Spain 34 91 640 0085 Sweden 46 0 8 587 895 00 Switzerland 41 56 200 51 51 Taiwan 886 02 2377 2222 Thailand 662 278 6777 United Kingdom 44 0 1635 523545 For further support information refer to the Technical Support and Professional Services appendix To comment on National Instruments documentation refer to the National Instruments Web site at ni com info and enter the info code feedback 2003 2
38. SE AI 10 GQ in 42 35 2 nA parallel with 100 pF AO lt 0 7 gt AO 1 25 Q Short 2 5at 10 2 5 at 10 10 V us circuit to ground AOGND AO DGND DO DIO lt 0 15 gt DIO 0 5 5 0 at 2 4 5 0 at 0 4 12 ns Connector 0 to 7 0 DIO lt 0 39 gt Connector lt 1 2 gt AI Analog Input AO Analog Output DIO Digital Input Output DO Digital Output Connecting to CompactRIO Extension 1 0 Chassis NI 783xR User Manual You can use the CompactRIO R Series Expansion chassis and CompactRIO I O modules with the NI 783xR Refer to the CompactRIO R Series Expansion System Installation Instructions for information about connecting the chassis to the NI 783xR B 4 ni com Appendix B Connecting 1 0 Signals Connecting to 5B and SSR Signal Conditioning NI provides cables that allow you to connect signals from the NI 783xR directly to 5B backplanes for analog signal conditioning and SSR backplanes for digital signal conditioning The NSC68 262650 cable connects the signals on the NI 783xR MIO connector directly to 5B and SSR backplanes This cable has a 68 pin male VHDCI connector on one end that plugs into the NI 783xR MIO connector The other end of this cable provides two 26 pin female headers plus one 50 pin female header One of the 26 pin headers contains all the NI 783xR analog input signals You can plug this connector directly into a 5B backplane for analog in
39. a DC path to ground for the instrumentation amplifier to work If the source is AC coupled capacitively coupled the instrumentation amplifier needs a resistor between the positive input and AIGND If the source has low impedance choose a resistor that is large enough not to significantly load the source but small enough not to produce significant input offset voltage as a result of input bias current typically 100 kQ to 1 MQ In this case connect the negative input directly to AIGND If the source has high output impedance balance the signal path as previously described using the same value resistor on both the positive and negative inputs Loading down the source causes some gain error Single Ended Connection Considerations When an NI 783xR AI signal is referenced to a ground that can be shared with other input signals it forms a single ended connection The input signal connects to the positive input of the instrumentation amplifier and the ground connects to the negative input of the instrumentation amplifier You can use single ended input connections for any input signal that meets the following conditions e The input signal is high level 21 V e The leads connecting the signal to the NI 783xR are less than 3 m 10 ft e The input signal can share a common reference point with other signals Use DIFF input connections for greater signal integrity for any input signal that does not meet the preceding conditions Nati
40. ain the VI when the R Series device is powered off so you must reload the VI each time you power on the device You can load the VI from onboard flash memory or from software over the bus interface One advantage to using flash memory is that the VI can start executing almost immediately after power up instead of waiting for the computer to completely boot and load the FPGA Refer to the LabVIEW Help for more information about how to store your VI in flash memory Reconfigurable 1 0 Applications You can use the LabVIEW FPGA Module to create or acquire new VIs for your application The FPGA Module allows you to define custom functionality for the R Series device using a subset of LabVIEW functionality Refer to the R Series examples located in the lt LabVIEW gt examples R Series directory for examples of FPGA VIs Software Development You can use LabVIEW with the LabVIEW FPGA Module to program the NI 783xR To develop real time applications that control the NI 783xR use LabVIEW with the LabVIEW Real Time Module LabVIEW FPGA Module The LabVIEW FPGA Module enables you to use LabVIEW to create VIs that run on the FPGA of the R Series device Use the FPGA Module VIs and functions to control the I O timing and logic of the R Series device and to generate interrupts for synchronization Select Help Search the LabVIEW Help to view the LabVIEW Help In the LabVIEW Help use the Contents tab to browse to the FPGA Interface book for m
41. alic text also denotes text that is a placeholder for a word or value that you must supply Text in this font denotes text or characters that you should enter from the keyboard sections of code programming examples and syntax examples This font is also used for the proper names of disk drives paths directories programs subprograms subroutines device names functions operations variables filenames and extensions NI 783xR refers to all PXI and PCI R Series devices with analog and digital I O National Instruments Corporation vil NI 783xR User Manual About This Manual Reconfigurable 1 0 Documentation The NI 783xR User Manual is one piece of the documentation set for your reconfigurable I O system and application Depending on the hardware and software you use for your application you could have any of several types of documentation The documentation includes the following documents Getting Started with the NI 783xR This document lists what you need to get started describes how to unpack and install the hardware and software and contains information about connecting I O signals to the NI 783xR LabVIEW FPGA Module Release and Upgrade Notes This document contains information about installing and getting started with the LabVIEW FPGA Module Select Start Program Files National Instruments lt LabVIEW gt LabVIEW Manuals to view the LabVIEW Manuals directory that contains this document LabVIEW Help Sel
42. artnership or joint venture relationship with National Instruments Patents For patents covering National Instruments products refer to the appropriate location Help Patents in your software the patents txt file on your CD or ni com patents WARNING REGARDING USE OF NATIONAL INSTRUMENTS PRODUCTS 1 NATIONAL INSTRUMENTS PRODUCTS ARE NOT DESIGNED WITH COMPONENTS AND TESTING FOR A LEVEL OF RELIABILITY SUITABLE FOR USE IN OR IN CONNECTION WITH SURGICAL IMPLANTS OR AS CRITICAL COMPONENTS IN ANY LIFE SUPPORT SYSTEMS WHOSE FAILURE TO PERFORM CAN REASONABLY BE EXPECTED TO CAUSE SIGNIFICANT INJURY TO A HUMAN 2 IN ANY APPLICATION INCLUDING THE ABOVE RELIABILITY OF OPERATION OF THE SOFTWARE PRODUCTS CAN BE IMPAIRED BY ADVERSE FACTORS INCLUDING BUT NOT LIMITED TO FLUCTUATIONS IN ELECTRICAL POWER SUPPLY COMPUTER HARDWARE MALFUNCTIONS COMPUTER OPERATING SYSTEM SOFTWARE FITNESS FITNESS OF COMPILERS AND DEVELOPMENT SOFTWARE USED TO DEVELOP AN APPLICATION INSTALLATION ERRORS SOFTWARE AND HARDWARE COMPATIBILITY PROBLEMS MALFUNCTIONS OR FAILURES OF ELECTRONIC MONITORING OR CONTROL DEVICES TRANSIENT FAILURES OF ELECTRONIC SYSTEMS HARDWARE AND OR SOFTWARE UNANTICIPATED USES OR MISUSES OR ERRORS ON THE PART OF THE USER OR APPLICATIONS DESIGNER ADVERSE FACTORS SUCH AS THESE ARE HEREAFTER COLLECTIVELY TERMED SYSTEM FAILURES ANY APPLICATION WHERE A SYSTEM FAILURE WOULD CREATE A RISK OF HARM TO PROPERTY OR PERSONS INCLUDING THE RISK OF BODILY I
43. ash memory stores the calibration constants for the device Calibration constants are the values that were written to the CalDACs to achieve calibration in the factory The NI 783xR hardware reads these constants from the flash memory and loads them into the CalDACs at power on This occurs before you load a VI into the FPGA Internal Calibration With internal calibration the NI 783xR can measure and correct almost all of its calibration related errors without any external signal connections NI provides software to perform an internal calibration This internal calibration process which generally takes less than two minutes is the preferred method of assuring accuracy in your application Internal calibration minimizes the effects of any offset and gain drifts particularly those due to changes in temperature During the internal calibration process the AI and AO channels are compared to the NI 783xR onboard voltage reference The offset and gain errors in the analog circuitry are calibrated out by adjusting the CalDACs to minimize these errors National Instruments Corporation 3 1 NI 783xR User Manual Chapter 3 Calibration If you have NI RIO installed you can find the internal calibration utility at Start All Programs National Instruments NI RIO device Calibrate 783xR Device Device is the NI PXI 783xR or NI PCI 783xR device Immediately after internal calibration the only significant residual calibration error is gain err
44. conductors To maximize the digital I O available on the NI 783xR some of the DIO lines are twisted with power or ground and some DIO lines are twisted with other DIO lines To obtain maximum signal integrity place edge sensitive or high frequency digital signals on the DIO lines that are paired with power or ground Because the DIO lines that are twisted with other DIO lines can couple noise onto each other use these lines for static National Instruments Corporation 2 17 NI 783xR User Manual Chapter 2 signals or non edge sensitive low frequency digital signals Examples of high frequency or edge sensitive signals include clock trigger pulse width Hardware Overview of the NI 783xR modulation PWM encoder and counter signals Examples of static signals or non edge sensitive low frequency signals include LEDs switches and relays Table 2 4 summarizes these guidelines Table 2 4 DIO Signal Guidelines for the NI 783xR Digital Lines SH68 C68 S Shielded Cable Signal Pairing Recommended Types of Digital Signals Connector 0 DIO lt 0 7 gt Connector 1 DIO lt 0 27 gt Connector 2 DIO lt 0 27 gt DIO line paired with power or ground All types high frequency or low frequency signals edge sensitive or non edge sensitive signals Connector 0 DIO lt 8 15 gt Connector 1 DIO lt 28 39 gt DIO line paired with another DIO line Static signals or non edge sensitive Connector 2 DIO lt 28
45. d cable National Instruments Corporation C 1 NI 783xR User Manual Technical Support and Professional Services Visit the following sections of the National Instruments Web site at ni com for technical support and professional services National Instruments Corporation Support Online technical support resources at ni com support include the following Self Help Resources For answers and solutions visit the award winning National Instruments Web site for software drivers and updates a searchable KnowledgeBase product manuals step by step troubleshooting wizards thousands of example programs tutorials application notes instrument drivers and so on Free Technical Support All registered users receive free Basic Service which includes access to hundreds of Application Engineers worldwide in the NI Developer Exchange at ni com exchange National Instruments Application Engineers make sure every question receives an answer For information about other technical support options in your area visit ni com services or contact your local office at ni com contact Training and Certification Visit ni com training for self paced training eLearning virtual classrooms interactive CDs and Certification program information You also can register for instructor led hands on courses at locations around the world System Integration If you have time constraints limited in house technical resources or o
46. e 80 dB DC to 100 kHz Analog Output Output Characteristics Output type 3 ee et ere Single ended voltage output Number of channels NI 7830R x tof 4 NE7831R 2 ungere et 8 NET7833R cede 8 R sol tion J ie inedit 16 bits 1 in 65 536 Update time rtt 1 0 us Max update rate esses 1 MS s Type OF DAC t eee es Enhanced R 2R Data transfers eonrnonrnronrnonrnrvrrsvnrnenrnenn Interrupts programmed I O National Instruments Corporation A 3 NI 783xR User Manual Appendix A Specifications Accuracy Information Absolute Accuracy Nominal Range V of Reading Absolute Accuracy at Positive Full Negative Full Temp Drift Full Scale Scale Scale 24 Hours 1 Year Offset uV C mV 10 0 10 0 0 0335 0 0351 2366 0 0005 5 88 Note Accuracies are valid for analog output following an internal calibration Analog output accuracies are listed for operation temperatures within 1 C of internal calibration temperature and 10 C of external or factory calibration temperature Temp Drift applies only if ambient is greater than 10 C of previous external calibration NI 783xR User Manual DC Transfer Characteristics 0 5 LSB typ 4 0 LSB max DNE PE oec eae 0 5 LSB typ 1 LSB max Monotonicity eee 16 bits guaranteed Voltage Output Rahdan dan a ENEE R 10 V Output coupling eee DC Output impedance
47. ect Help Search the LabVIEW Help in LabVIEW to view the LabVIEW Help This help file contains information about using VIs with the NI 783xR and using the LabVIEW FPGA Module and the LabVIEW Real Time Module Browse the FPGA Module book in the Contents tab for information about how to use the FPGA Module to create VIs that run on the NI 783xR device Browse the Real Time Module book in the Contents tab for information about how to build deterministic applications using the LabVIEW Real Time Module Related Documentation The following documents contain information you might find helpful NI 783xR User Manual NI Developer Zone tutorial Field Wiring and Noise Considerations for Analog Signals at ni com zone PICMG CompactPCI 2 0 R3 0 PXI Hardware Specification Revision 2 1 PXI Software Specification Revision 2 1 viii ni com Introduction This chapter describes the NI 783xR the concept of the Reconfigurable I O RIO device optional software and equipment for using the NI 783xR and safety information about the NI 783xR About the NI 783xR The NI 783xR devices are R Series RIO devices with 16 bit analog input AI channels 16 bit analog output AO channels and digital I O DIO lines e The NI PXI 7830R and NI PCI 7830R have four independent AI channels four independent AO channels and 56 DIO lines The NI PXI 7831R 7833R and NI PCI 7831R 7833R have eight independent AI channels eight independent
48. edances this connection leaves the differential signal path significantly out of balance Noise that couples electrostatically onto the positive line does not couple onto the negative line because it is connected to ground Hence this noise appears as a differential mode signal instead of acommon mode signal and the instrumentation amplifier does not reject it In this case instead of directly connecting the negative NI 783xR User Manual 2 10 ni com Chapter 2 Hardware Overview of the NI 783xR line to AIGND connect it to AIGND through a resistor that is about 100 times the equivalent source impedance The resistor puts the signal path nearly in balance About the same amount of noise couples onto both connections which yields better rejection of electrostatically coupled noise Also this input mode does not load down the source other than the very high input impedance of the instrumentation amplifier 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 2 6 This fully balanced input mode offers slightly better noise rejection but has the disadvantage of loading down the source with the series combination sum of the two resistors If for example the source impedance is 2 kQ and each of the two resistors is 100 kQ the resistors load down the source with 200 kQ and produce a 1 gain error Both inputs of the instrumentation amplifier require
49. ent more complex algorithms such as control loops You are limited only by the size of the FPGA Reconfigurable 1 0 Architecture NI 783xR User Manual Figure 1 1 shows an FPGA connected to fixed I O resources and a bus interface The fixed I O resources include A D converters ADCs D A converters DACs and digital I O lines Fixed I O Resource Fixed I O Resource FPGA Fixed I O Resource Fixed I O Resource Bus Interface Figure 1 1 High Level FPGA Functional Overview Software accesses the R Series device through the bus interface and the FPGA connects the bus interface and the fixed I O to make possible timing triggering processing and custom I O measurements using the LabVIEW FPGA Module 1 4 ni com Chapter 1 Introduction The FPGA logic provides timing triggering processing and custom I O measurements Each fixed I O resource used by the application uses a small portion of the FPGA logic that controls the fixed I O resource The bus interface also uses a small portion of the FPGA logic to provide software access to the device The remaining FPGA logic is available for higher level functions such as timing triggering and counting The functions use varied amounts of logic You can place useful applications in the FPGA How much FPGA space your application requires depends on your need for I O recovery I O and logic algorithms The FPGA does not ret
50. ent that technical or typographical errors exist National Instruments reserves the right to make changes to subsequent editions of this document without prior notice to holders of this edition The reader should consult National Instruments if errors are suspected In no event shall National Instruments be liable for any damages arising out of or related to this document or the information contained in it EXCEPT AS SPECIFIED HEREIN NATIONAL INSTRUMENTS MAKES NO WARRANTIES EXPRESS OR IMPLIED AND SPECIFICALLY DISCLAIMS ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE CUSTOMER S RIGHT TO RECOVER DAMAGES CAUSED BY FAULT OR NEGLIGENCE ON THE PART OF NATIONAL INSTRUMENTS SHALL BE LIMITED TO THE AMOUNT THERETOFORE PAID BY THE CUSTOMER NATIONAL INSTRUMENTS WILL NOT BE LIABLE FOR DAMAGES RESULTING FROM LOSS OF DATA PROFITS USE OF PRODUCTS OR INCIDENTAL OR CONSEQUENTIAL 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 causes beyond its reasonable control The warranty provided herein does not cover damages defects malfunctions or service failures caused by owner s failure to follow the National Instruments i
51. es Refer to Appendix A Specifications for more information about input ranges National Instruments Corporation 2 9 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR Differential Connections for Nonreferenced or Floating Signal Sources Figure 2 6 shows how to connect a floating signal source to a channel on the NI 783xR configured in DIFF input mode Al e ro Bias poen o dec Al etnan aton s i mplifier Source Z 3 Measured _ Voltage m Bias Current 2 Return Paths EDEA eee ee tee ee 04 AISENSE AIGND zm lt 7 I O Connector DIFF Input Mode Selected Figure 2 6 Differential Input Connections for Nonreferenced Signals Figure 2 6 shows two bias resistors connected in parallel with the signal leads of a floating signal source If you do not use the resistors and the source is truly floating the source might not remain within the common mode signal range of the instrumentation amplifier causing erroneous readings You must reference the source to AIGND by connecting the positive side of the signal to the positive input of the instrumentation amplifier and connecting the negative side of the signal to AIGND and to the negative input of the instrumentation amplifier without resistors This connection works well for DC coupled sources with low source impedance less than 100 Q For larger source imp
52. es The NI PXI 783xR accesses the RTSI bus through the PXI trigger lines implemented on the PXI backplane Refer to Appendix A Specifications for detailed NI 783xR specifications Using PXI with CompactPCl A Using PXI compatible products with standard CompactPCI products is an important feature provided by PXI Hardware Specification Revision 2 1 and PXI Software Specification Revision 2 1 If you use a PXI compatible plug in card in a standard CompactPCI chassis you cannot use PXI specific functions but you still can use the basic plug in card functions For example the RTSI bus on the R Series device is available in a PXI chassis but not in a CompactPCI chassis The CompactPCI specification permits vendors to develop sub buses that coexist with the basic PCI interface on the CompactPCI bus Compatible operation is not guaranteed between CompactPCI devices with different sub buses nor between CompactPCI devices with sub buses and PXI The standard implementation for CompactPCI does not include these sub buses The R Series device works in any standard CompactPCI chassis adhering to the PICMG CompactPCI 2 0 R3 0 core specification PXI specific features are implemented on the J2 connector of the CompactPCI bus Table 1 1 lists the J2 pins used by the NI 783xR The NI 783xR is compatible with any CompactPCI chassis with a sub bus that does not drive these lines Even if the sub bus is capable of driving these lines the R Series device
53. fore connecting them to or disconnecting them from the NI 783xR Operate the NI 783xR at or below the measurement category listed in the Maximum working voltage section of Appendix A Specifications Measurement circuits are subjected to working voltages and transient stresses overvoltage from the circuit to which they are connected during measurement or test Measurement categories establish standard impulse withstand voltage levels that commonly occur in electrical distribution systems The following list describes installation categories Measurement Category I Measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage This category is for measurements of voltages from specially protected secondary circuits Such voltage measurements include signal levels special equipment limited energy parts of equipment circuits powered by regulated low voltage sources and electronics Measurement Category II Measurements performed on circuits directly connected to the electrical distribution system This category refers to local level electrical distribution such as that provided by a standard wall outlet for example 115 V for U S or 230 V for Europe Examples of Measurement Category II are measurements performed on household appliances portable tools and similar products Measurement Category III Measurements performed in the building installation at the distribution
54. gative of or minus Q Ohms Per Percent s Plus or minus Positive of or plus O National Instruments Corporation G 1 NI 783xR User Manual Glossary r 5V A D AC ADC Al Al lt i gt AIGND AISENSE AO AO lt i gt AOGND ASIC bipolar NI 783xR User Manual Square root of 5 VDC source signal Amperes Analog to digital Alternating current Analog to digital converter An electronic device often an integrated circuit that converts an analog voltage to a digital number Analog input Analog input channel signal Analog input ground signal Analog input sense signal Analog output Analog output channel signal Analog output ground signal Application Specific Integrated Circuit A proprietary semiconductor component designed and manufactured to perform a set of specific functions A signal range that includes both positive and negative values for example 5 to 5 V G 2 O National Instruments Corporation CalDAC CH cm CMOS CMRR common mode voltage CompactPCI D A DAC DAQ dB DC DGND DIFF O National Instruments Corporation G 3 Glossary Celsius Calibration DAC Channel Pin or wire lead to which you apply or from which you read the analog or digital signal Analog signals can be single ended or differential For digital signals you group channels to form ports Ports usually consist of either four or eight digital channels
55. gger line simultaneously Such signal driving can damage the NI 783xR and the other device NI is not liable for any damage resulting from such signal driving Or NM or Nm or Nm PXI Star 929 ooo PXI Star 8998 eeee PXI Star 5555 eeee 29029 ooo 2299 EERE BEBE EEEE LBLStarO LBRO LBLStarO LBRO LBLStarO LBRO LBLStar1 LBR1 LBLStar1 LBR1 34 LBLStar1 LBR1 LBLStar2 LBR2 LBLStar2 LBR2 LBLStar2 LBR2 LBLStar3 LBR3 LBLStar3 LBR3 LBLStar3 LBR3 e e e e e e e e e e e e Slot 2 Slot 3 Slot 4 A Slot 2 device ties the PXI Star Line to the PXI 10 MHz clock Figure 2 11 PXI Star Trigger Connections in a PXI Chassis Refer to the PXI Hardware Specification Revision 2 1 and PXI Software Specification Revision 2 1 at www pxisa org for more information about PXI triggers NI 783xR User Manual 2 20 ni com Chapter 2 Hardware Overview of the NI 783xR Switch Settings Refer to Figure 2 12 for the location of switches on the NI PXI 783xR and Figure 2 13 for the location of switches on the NI PCI 783xR For normal operation SW1 is in the OFF position To prevent a VI stored in flash memory from loading to the FPGA at power up move SW1 to the ON position as shown in Figure 2 14 iyi Note SW2 and SW3 are not connected
56. h channel can source or sink up to 2 5 mA AOGND Analog Output Ground The analog output voltages are referenced to this node All three ground references AIGND AOGND and DGND are connected to each other on the NI 783xR DGND Digital Ground These pins supply the reference for the digital signals at the I O connector and the 5 V supply All three ground references AIGND AOGND and DGND are connected to each other on the NI 783xR DIO lt 0 15 gt DGND Input or Digital I O signals Connector 0 Output DIO lt 0 39 gt Connector lt 1 2 gt AN Caution Connections that exceed any of the maximum ratings of input or output signals on the NI 783xR can damage the NI 783xR and the computer Maximum input ratings for each signal are in the Protection column of Table B 2 NI is not liable for any damage resulting from such signal connections O National Instruments Corporation B 3 NI 783xR User Manual Appendix B Connecting 1 0 Signals Table B 2 NI 783xR 1 0 Signal Summary Signal Impedance Protection Type and Input Volts Source Sink Signal Name Direction Output On Off mA at V mA at V Rise Time Bias 45V DO AI lt 0 7 gt AI 10 GQ in 42 35 2 nA parallel with 100 pF AI lt 0 7 gt AI 10 GQ in 42 35 2 nA parallel with 100 pF AIGND AO AISEN
57. hannels o n Digital VO 16 x a gt 9 5 K Digital 1 0 40 5 8 D PXI Local Bus NI PXI 783xR only gt D 5 p Y E I ATSI Bus gt z S E S D 8 K Digital 1 0 40 E T 5 lt Figure 2 2 NI 7831R 7833R Block Diagram NI 7830R Overview The NI 7830R has four independent 16 bit AI channels four independent 16 bit AO channels and 56 bidirectional DIO lines that you can configure individually for input or output NI 7831R 7833R Overview The NI 783 1R and NI 7833R each have eight independent 16 bit AI channels eight independent 16 bit AO channels and 96 bidirectional DIO lines that you can configure individually for input or output Analog Input You can sample NI 783xR AI channels simultaneously or at different rates The input mode is software configurable and the input range is fixed at NI 783xR User Manual 2 2 ni com Chapter 2 Hardware Overview of the NI 783xR 10 V The converters return data in two s complement format Table 2 1 shows the ideal output code returned for a given AI voltage Table 2 1 Ideal Output Code and AI Voltage Mapping Output Code Hex Input Description AI Voltage Two s Complement Full scale range 1 LSB 9 999605 7FFF Full scale range 2 LSB 9 999390 7FFE Midscale 0 000000 0000 Negative full scale range 1 LSB 9 999695 8001 Negative full scale range 10
58. he NI 783xR Bus Interface PXI NI PXI 783xR only Master slave PCI NI PCI 783xR only Master slave Power Requirement 5 VDC 45 NI T830R ese ee ette 330 mA typ 355 mA max NI GE 330 mA typ 355 mA max My vvs 364 mA typ 586 mA max 43 3 VDC 45 NI Og 462 mA typ 660 mA max MR uses 462 mA typ 660 mA max NI TB 33R ccsssccsccesscssecsaccassessovecsssssees 727 mA typ 1 148 mA max To calculate the total current sourced by the digital outputs use the following equation J p current sourced on channel i i 1 Where j is the number of digital outputs being used to source current Power available at I O connectors 4 50 to 5 25 VDC 250 mA per I O connector pin Does not include current drawn form the 5 V line on the I O connectors Does not include current sourced by the digital outputs National Instruments Corporation A 7 NI 783xR User Manual Appendix A Specifications Physical Dimensions not including connectors NI PXI 783xR ess 16 cm x 10 cm 6 3 in x 3 9 in NIPCET83XR enim 17 cm x 11 cm 6 7 in x 4 3 in I O conhectors i tores Three 68 pin female high density VHDCI type Maximum Working Voltage Maximum working voltage refers to the signal voltage plus the common mode voltage Channel to earth esessss 12 V Measurement Category I Channel to channel
59. idual application requirements and to mimic the functionality of fixed I O devices For example you can configure an R Series device in one application for three 32 bit quadrature encoders and then reconfigure the R Series device in another application for eight 16 bit event counters You also can use the R Series device with the LabVIEW Real Time Module in timing and triggering applications such as control and hardware in the loop HIL simulations For example you can configure the R Series device for a single timed loop in one application and then reconfigure the device in another application for four independent timed loops with separate I O resources National Instruments Corporation 1 8 NI 783xR User Manual Chapter 1 Introduction User Defined 1 0 Resources You can create your own custom measurements using the fixed I O resources For example one application might require an event counter that increments when a rising edge appears on any of three digital input lines Another application might require a digital line to be asserted after an analog input exceeds a programmable threshold Device Embedded Logic and Processing You can implement LabVIEW logic and processing in the FPGA of the R Series device Typical logic functions include Boolean operations comparisons and basic mathematical operations You can implement multiple functions efficiently in the same design operating sequentially or in parallel You also can implem
60. iew of the NI 783xR Single Ended Connections for Grounded Signal Sources NRSE Input Mode To measure a grounded signal source with a single ended input mode you must configure the NI 783xR in the NRSE input mode Then connect the signal to the positive input of the NI 783xR instrumentation amplifier and connect the signal local ground reference to the negative input of the instrumentation amplifier The ground point of the signal should be connected to AISENSE Any potential difference between the NI 783xR ground and the signal ground appears as a common mode signal at both the positive and negative inputs of the instrumentation amplifier The instrumentation amplifier rejects this difference If the input circuitry of a NI 783xR is referenced to ground in RSE input mode this difference in ground potentials appears as an error in the measured voltage Figure 2 8 shows how to connect a grounded signal source to a channel on the NI 783xR configured for NRSE input mode Al Ground Referenced Signal Source Common Mode Noise and Ground Potential I O Connector Instrumentation Amplifier Measured Voltage m AISENSE tot o AIGND VY NRSE Input Mode Selected Figure 2 8 Single Ended Input Connections for Ground Referenced Signals National Instruments Corporation 2 13 NI 783xR User Manual Hardware Overview of the NI 783x
61. ional Shock 30 g peak half sine 11 ms pulse Tested in accordance with IEC 60068 2 27 Test profile developed in accordance with MIL PRF 28800F Random Vibration Operating creen 5 Hz to 500 Hz 0 3 g Nonoperating onrrvvrrvrrvrnvvrrvrnrnarnere 5 Hz to 500 Hz 2 4 Zms Tested in accordance with IEC 60068 2 64 Nonoperating test profile exceeds the requirements of MIL PRF 28800F Class 3 National Instruments Corporation A 9 NI 783xR User Manual Appendix A Specifications Safety The NI 783xR is designed to meet the requirements of the following standards of safety for electrical equipment for measurement control and laboratory use e IEC 61010 1 EN 61010 1 e UL 61010 1 CAN CSA C22 2 No 61010 1 3 Note Refer to the product label or visit ni com certification search by model number or product line and click the appropriate link in the Certification column for UL and other safety certifications Electromagnetic Compatibility The NI 783xR is designed to meet the requirements of the following standards of EMC for electrical equipment for measurement control and laboratory use e EN 61326 EMC requirements Minimum Immunity e EN 55011 Emissions Group 1 Class A CE C Tick ICES and FCC Part 15 Emissions Class A 3 Note For EMC compliance operate this device with shielded cabling CE Compliance This product meets the essential requirements of applicable European Direc
62. ment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user is required to correct the interference at their own expense Canadian Department of Communications This Class A digital apparatus meets all requirements of the Canadian Interference Causing Equipment Regulations Cet appareil num rique de la classe A respecte toutes les exigences du R glement sur le mat riel brouilleur du Canada Compliance with EU Directives Users in the European Union EU should refer to the Declaration of Conformity DoC for information pertaining to the CE marking Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column The CE marking Declaration of Conformity contains important supplementary information and instructions for the user or installer Contents About This Manual COnDVentlons nie ERN A UA e e e ERU NE RENS eas PIRE RR HER teed ee vii Reconfigurable I O Documentation sese rennen viii Related Documentation oti teer i aa KA ia Eia viii Chapter 1 Introduction
63. nd the LabVIEW Real Time Module and then download the VIs to run on a hardware target with a real time operating system The LabVIEW Real Time Module allows you to use the NI 783xR in RT Series PXI systems being controlled in real time by a VI The NI 783xR is designed as a single point AI AO and DIO complement tothe LabVIEW Real Time Module Refer to the LabVIEW Help available by selecting Help Search the LabVIEW Help for more information about the LabVIEW Real Time Module 1 6 ni com Cables and Optional Equipment Chapter 1 National Instruments offers a variety of products you can use with R Series devices including cables connector blocks and other accessories as shown in Table 1 2 Table 1 2 Cables and Accessories male connector to female 0 050 series D type connector The cable is constructed with individually shielded twisted pairs for the analog input channels plus an additional shield around all the analog signals This cable provides superior noise immunity on the MIO connector NI 783xR Cable Cable Description Connector Accessories SH68 C68 S Shielded 68 pin VHDCI MIO or DIO Connects to the following male connector to female standard 68 pin screw 0 050 series D type terminal blocks connector The cable is e SCB 68 constructed with 34 twisted wire pairs and an overall CB 68LP shield CB 68LPR TBX 68 SHC68 68 RMIO Shielded 68 pin VHDCI MIO only Connects to the
64. ng the SCB 68 Shielded Connector Block Appendix D Technical Support and Professional Services Glossary NI 783xR User Manual vi ni com About This Manual Conventions This manual describes the electrical and mechanical aspects of the National Instruments 783xR devices and contains information about programming and using the devices lt gt bold italic monospace NI 783xR The following conventions appear in this manual Angle brackets that contain numbers separated by an ellipsis represent a range of values associated with a bit or signal name for example AO lt 3 0 gt The symbol leads you through nested menu items and dialog box options to a final action The sequence File Page Setup Options directs you to pull down the File menu select the Page Setup item and select Options from the last dialog box This icon denotes a note which alerts you to important information This icon denotes a caution which advises you of precautions to take to avoid injury data loss or a system crash When this symbol is marked on the device refer to the Safety Information section of Chapter 1 Introduction for precautions to take Bold text denotes items that you must select or click in the software such as menu items and dialog box options Bold text also denotes parameter names and hardware labels Italic text denotes variables emphasis a cross reference or an introduction to a key concept It
65. nstallation operation or maintenance instructions owner s modification of the product owner s abuse misuse or negligent acts and power failure or surges fire flood accident actions of third parties or other events outside reasonable control Copyright Under the copyright laws this publication may not be reproduced or transmitted in any form electronic or mechanical including photocopying recording storing in an information retrieval system or translating in whole or in part without the prior written consent of National Instruments Corporation National Instruments respects the intellectual property of others and we ask our users to do the same NI software is protected by copyright and other intellectual property laws Where NI software may be used to reproduce software or other materials belonging to others you may use NI software only to reproduce materials that you may reproduce in accordance with the terms of any applicable license or other legal restriction Trademarks National Instruments NI ni com and LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com legal for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies Members of the National Instruments Alliance Partner Program are business entities independent from National Instruments and have no agency p
66. onal Instruments Corporation 2 11 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR You can configure the NI 783xR channels in software for RSE or NRSE input modes Use the RSE input mode for floating signal sources In this case the NI 783xR provides the reference ground point for the external signal Use the NRSE input mode for ground referenced signal sources In this case the external signal supplies its own reference ground point and the NI 783xR should not supply one In single ended input modes electrostatic and magnetic noise couples into the signal connections more than in differential input modes The coupling is the result of differences in the signal path Magnetic coupling is proportional to the area between the two signal conductors Electrical coupling is a function of how much the electric field differs between the two conductors Single Ended Connections for Floating Signal Sources RSE Input Mode Figure 2 7 shows how to connect a floating signal source to a channel on the NI 783xR configured for RSE input mode Al ot Al Instrumentation Amplifier Measured Floating I M Voltage Signal Vs o Source e i i AISENSE AIGND 04 I O Connector RSE Input Mode Selected Figure 2 7 Single Ended Input Connections for Nonreferenced or Floating Signals NI 783xR User Manual 2 12 ni com Chapter 2 Hardware Overv
67. or due to time and temperature drift of the onboard voltage reference You can minimize gain errors by performing an external calibration If you are primarily taking relative measurements then you can ignore a small amount of gain error and self calibration is sufficient The flash memory on the NI 783xR stores the results of an internal calibration so the CalDACs automatically load with the newly calculated calibration constants the next time the NI 783xR is powered on External Calibration An external calibration refers to calibrating your device with a known external reference rather than relying on the onboard reference The NI 783xR has an onboard calibration reference to ensure the accuracy of self calibration The reference voltage is measured at the factory and stored in the flash memory for subsequent internal calibrations Externally calibrate the device annually or more often if you use it at extreme temperatures During the external calibration process the onboard reference value is re calculated This compensates for any time or temperature drift related errors in the onboard reference that might have occurred since the last calibration You can save the results of the external calibration process to flash memory so that the NI 783xR loads the new calibration constants the next time it is powered on The device uses the newly measured onboard reference level for subsequent internal calibrations To externally calibrate your
68. ore information about the FPGA Interface functions National Instruments Corporation 1 5 NI 783xR User Manual Chapter 1 Introduction You can use Interactive Front Panel Communication to communicate directly with the FPGA VI running on the FPGA target You can use Programmatic FPGA Interface Communication to programmatically control and communicate with FPGA VIs from host VIs Use the FPGA Interface functions when you target LabVIEW for Windows or an RT target to create host VIs that wait for interrupts and control the FPGA by reading and writing the FPGA VI running on the R Series device Note If you use the R Series device without the FPGA Module you can use the RIO Device Setup utility available by selecting Start Program Files National Instruments NI RIO RIO Device Setup to download precomplied FPGA Vis to the flash memory of the R Series device This utility is installed by the NI RIO CD You also can use the utility to configure the analog input mode to synchronize the clock on the R Series device to the PXI clock for NI PXI 783xR only and to configure when the VI loads from flash memory LabVIEW Real Time Module NI 783xR User Manual The LabVIEW Real Time Module extends the LabVIEW development environment to deliver deterministic real time performance You can write host VIs that run in Windows or on RT targets to communicate with FPGA VIs that run on the NI 783xR You can develop real time VIs with LabVIEW a
69. ortion The ratio of the total rms signal due to harmonic distortion to the overall rms signal in decibel or a percentage A temperature sensor created by joining two dissimilar metals The junction produces a small voltage as a function of the temperature Transistor transistor logic Given a number x expressed in base 2 with n digits to the left of the radix point the base 2 number 27 x Volts Volts direct current Very high density cabled interconnect Virtual instrument Program in LabVIEW that models the appearance and function of a physical instrument Volts input high Volts input low Volts output high Volts output low Volts root mean square Multiple voltage readings taken at a specific sampling rate G 8 O National Instruments Corporation
70. put signal conditioning The NI 783xR AI lt 0 n gt correspond to the 5B backplane channels lt 0 n gt in sequential order Configure the AI channels to use the NRSE input mode when using 5B signal conditioning The other 26 pin header contains all the NI 783xR analog output signals You can plug this connector directly into a 5B backplane for AO signal conditioning The NI 783xR AO lt 0 n gt correspond to the 5B backplane channels lt 0 n gt in sequential order The 50 pin header contains the 16 DIO lines available on the NI 783xR MIO connector You can plug this header directly into an SSR backplane for digital signal conditioning DIO lines lt 0 15 gt correspond to the 5B backplane Slots lt 0 15 gt in sequential order The 5B connector pinouts are compatible with eight channel 5B08 backplanes and 16 channel 5B01 backplanes The NI 7830R can accept analog input from the first four channels of a 16 channel backplane The NI 7831R 7833R can accept analog input from the first eight channels of a 16 channel backplane The SSR connector pinout is compatible with eight 16 24 and 32 channel SSR backplanes You can connect to an SSR backplane containing a number of channels unequal to the 16 DIO lines available on the 50 pin header In this case you have access to only the channels that exist on both the SSR backplane and the NSC68 262650 cable 50 pin header National Instruments Corporation B 5 NI 783xR User Manual Appendix
71. return signal e The signal leads travel through noisy environments Differential signal connections reduce noise pickup and increase common mode noise rejection Differential signal connections also allow input signals to float within the common mode limits of the instrumentation amplifier 2 8 ni com Chapter 2 Hardware Overview of the NI 783xR Differential Connections for Ground Referenced Signal Sources Figure 2 5 shows how to connect a ground referenced signal source to a channel on the NI 783xR configured in DIFF input mode I O Connector Al i Ground oT i Referenced ot Al Instrumentation 1 Signal Vs Amplifier i Source S Measured o M Voltage Common N Mode Noise and ven Ground luene Oe ees o4 AISENSE Potential a AIGND DIFF Input Mode Selected Figure 2 5 Differential Input Connections for Ground Referenced Signals With this connection type the instrumentation amplifier rejects both the common mode noise in the signal and the ground potential difference between the signal source and the NI 783xR ground shown as V4 in Figure 2 5 In addition the instrumentation amplifier can reject common mode noise pickup in the leads connecting the signal sources to the device The instrumentation amplifier can reject common mode signals when V and V input signals are both within their specified input rang
72. rovide higher current sourcing or sinking capability If you connect multiple digital output lines in parallel your application must drive all of these lines simultaneously to the same value If you connect digital lines together and drive them to different values excessive current can flow through the DIO lines and damage the NI 783xR Refer to Appendix A Specifications for more information about DIO specifications Figure 2 10 shows signal connections for three typical DIO applications 2 16 ni com Chapter 2 Hardware Overview of the NI 783xR VW LED TTL or DGND 5V i vcmos Compatible Devices t DIO lt 4 7 gt 5 V CMOS lt 4 oo t gt o soo TTL LVTTL CMOS or LVCMOS Signal o DIO lt 0 3 gt Ot 5 V VW T Switch Y DGND I O Connector NI 783xR 8 3 V CMOS TUse a pull up resistor when driving 5 V CMOS devices Figure 2 10 Example Digital 1 0 Connections Figure 2 10 shows DIO lt 0 3 gt configured for digital input and DIO lt 4 7 gt configured for digital output Digital input applications include receiving TTL LVTTL CMOS or LVCMOS signals and sensing external device states such as the state of the switch shown in Figure 2 10 Digital output applications include sending TTL or LVCMOS signals and driving external devices such as the LED shown in Figure 2 10 The NI 783xR SH68 C68 S shielded cable contains 34 twisted pairs of
73. rs directly into an 8 16 24 or 32 channel SSR backplane for digital signal conditioning One of the 50 pin headers contains DIO lt 0 23 gt from the NI 783xR DIO connector These lines correspond to Slots lt 0 23 gt on an SSR backplane in sequential order The other 50 pin header contains DIO lt 24 39 gt from the NI 783xR NI 783xR User Manual B 6 ni com Appendix B Connecting 1 0 Signals DIO connector These lines correspond to Slots lt 0 15 gt on an SSR backplane in sequential order You can connect to an SSR backplane containing a number of channels unequal to the number of lines on the NSC68 5050 cable header In this case you have access only to the channels that exist on both the SSR backplane and the NSC68 5050 cable header you are using Figure B 4 shows the connector pinouts when using the NSC68 5050 cable DIO23 1 2 NC NC 1 2 NC DIO22 314 NC NC 3 4 NC DIO21 516 NC NC 516 NC DIO20 71 8 NC NC 7 8 NC DIO19 9 10 NC NC 9 10 NC DIO18 11112 NC NC 11 12 NC DIO17 13114 NC NC 13 14 NC DIO16 15 16 NC NC 15116 NC DIO15 17 18 NC DIO39 17 18 NC DIO14 19 20 DGND DIO38 19120 NC DIO13 21 22 DGND DIO37 21 22 NC DIO12 23 24 DGND DIO36 23 24 NC DIO11 25126 DGND DIO35 25126 NC DIO10 27 28 DGND DIO34 27 28 NC DIO9 29
74. subject to restrictions in the FCC rules In Canada the Department of Communications DOC of Industry Canada regulates wireless interference in much the same way Digital electronics emit weak signals during normal operation that can affect radio television or other wireless products All Class A products display a simple warning statement of one paragraph in length regarding interference and undesired operation The FCC rules have restrictions regarding the locations where FCC Class A products can be operated Consult the FCC Web site at www fcc gov for more information FCC DOC Warnings This equipment generates and uses radio frequency energy and if not installed and used in strict accordance with the instructions in this manual and the CE marking Declaration of Conformity may cause interference to radio and television reception Classification requirements are the same for the Federal Communications Commission FCC and the Canadian Department of Communications DOC Changes or modifications not expressly approved by NI could void the user s authority to operate the equipment under the FCC Rules Class A Federal Communications Commission This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equip
75. the NI 783xR Do not operate the NI 783xR in an explosive atmosphere or where there might be flammable gases or fumes If you must operate the NI 783xR in such an environment it must be in a suitably rated enclosure If you need to clean the NI 783xR use a soft nonmetallic brush Make sure that the NI 783xR is completely dry and free from contaminants before returning it to service Operate the NI 783xR only at or below Pollution Degree 2 Pollution is foreign matter in a solid liquid or gaseous state that can reduce dielectric strength or surface resistivity The following is a description of pollution degrees e Pollution Degree 1 No pollution or only dry nonconductive pollution occurs The pollution has no influence e Pollution Degree 2 Only nonconductive pollution occurs in most cases Occasionally however a temporary conductivity caused by condensation can be expected Pollution Degree 3 Conductive pollution occurs or dry nonconductive pollution occurs that becomes conductive due to condensation You must insulate signal connections for the maximum voltage for which the NI 783xR is rated Do not exceed the maximum ratings for the NI 783xR Do not install wiring while the NI 783xR is live with electrical signals Do not remove or add connector blocks when power is connected National Instruments Corporation 1 9 NI 783xR User Manual Chapter 1 Introduction to the system Remove power from signal lines be
76. ther project challenges National Instruments Alliance Partner members can help To learn more call your local NI office or visit ni com alliance Declaration of Conformity DoC A DoC is our claim of compliance with the Council of the European Communities using the manufacturer s declaration of conformity This system affords the user protection for electronic compatibility EMC and product safety You can obtain the DoC for your product by visiting ni com certification D 1 NI 783xR User Manual Appendix D Technical Support and Professional Services Calibration Certificate If your product supports calibration you can obtain the calibration certificate for your product at ni com calibration If you searched ni com and could not find the answers you need contact your local office or NI corporate headquarters Phone numbers for our worldwide offices are listed at the front of this manual You also can visit the Worldwide Offices section of ni com niglobal to access the branch office Web sites which provide up to date contact information support phone numbers email addresses and current events NI 783xR User Manual D 2 ni com Glossary Symbol Prefix Value p pico 10 12 n nano 10 u micro 10 6 m milli 10 3 k kilo 103 M mega 106 G giga 10 Numbers Symbols E Degrees gt Greater than 2 Greater than or equal to lt Less than lt Less than or equal to Ne
77. tives as amended for CE marking as follows e 73 23 EEC Low Voltage Directive safety e 89 336 EEC Electromagnetic Compatibility Directive EMC iyi Note Refer to the Declaration of Conformity DoC for this product for any additional regulatory compliance information To obtain the DoC for this product visit ni com certification search by model number or product line and click the appropriate link in the Certification column Waste Electrical and Electronic Equipment WEEE EU Customers At the end of their life cycle all products must be sent to a WEEE recycling center For more information about WEEE recycling centers and National Instruments WEEE initiatives visit ni com environment weee htm NI 783xR User Manual A 10 ni com Connecting 1 0 Signals This appendix describes how to make input and output signal connections to the NI 783xR I O connectors Figure B 1 shows the I O connector locations for the NI PXI 7831R 7833R and the NI PCI 7831R 7833R The NI PXI 7830R and NI PCI 7830R do not have Connector 2 DIO NE JO Wr NATIONAL p INSTRUMENTS a FN Q e Q Q e 3 z E Q 9 z o D o 2 o YY lan Q Q 8 8 Nest Z NAN m m O O 4 d Oo O D D N Q Q 2 2 9 9 A S 9 S S JA m reg 9 9 O 3 p DIN Figure B 1 NI 783xR Connector Locations National Instruments Corporation B 1 NI 783xR User Manual Appendix
78. ts or devices with nonisolated outputs that plug into the building power system are ground referenced signal sources The difference in ground potential between two instruments connected to the same building power system is typically between 1 and 100 mV This difference can be much higher if power distribution circuits are improperly connected If a grounded signal source is improperly measured this difference might appear as a measurement error The connection instructions for grounded signal sources are designed to eliminate this ground potential difference from the measured signal NI 783xR User Manual The following sections discuss single ended and differential measurements and considerations for measuring both floating and ground referenced signal sources Figure 2 4 summarizes the recommended input mode for both types of signal sources 2 6 ni com Chapter 2 Hardware Overview of the NI 783xR Input Signal Source Type 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 Al lt i gt oA Al lt i gt Ov Al lt b e Y Differential
79. u PWM PXI NI 783xR User Manual An undesirable electrical signal Noise comes from external sources such as the AC power line motors generators transformers fluorescent lights CRT displays computers electrical storms welders radio transmitters and internal sources such as semiconductors resistors and capacitors Noise corrupts signals you are trying to send or receive Nonreferenced single ended mode All measurements are made with respect to a common NRSE measurement system reference but the voltage at this reference can vary with respect to the measurement system ground Output pin A counter output pin where the counter can generate various TTL pulse waveforms Peripheral Component Interconnect A high performance expansion bus architecture originally developed by Intel to replace ISA and EISA It is achieving widespread acceptance as a standard for PCs and work stations PCI offers a theoretical maximum transfer rate of 132 MB s 1 A communications connection on a computer or a remote controller 2 A digital port consisting of four or eight lines of digital input and or output Parts per million Pull up Pulse width modulation PCI eXtensions for Instrumentation An open specification that builds off the CompactPCI specification by adding instrumentation specific features G 6 O National Instruments Corporation RAM resolution RIO rms RSE RTSI S s signal conditioning slew rate
80. ull scale range 1 LSB 9 999605 8001 Negative full scale range 10 000000 8000 Any output voltage 40 Kona Be x 32 768 ER Note If your VI does not set the output value for an AO channel then the AO channel voltage output will be undefined NI 783xR User Manual ni com Chapter 2 Hardware Overview of the NI 783xR Connecting Analog Output Signals The AO signals are AO lt 0 n gt and AOGND AO lt 0 n gt are the AO channels AOGND is the ground reference signal for the AO channels Figure 2 9 shows how to make AO connections to the NI 783xR Load VOUTO _ NI 783xR Figure 2 9 Analog Output Connections Digital 1 0 You can configure the NI 783xR DIO lines individually for either input or output When the system powers on the DIO lines are high impedance To set another power on state you can configure the NI 783xR to load a VI when the system powers on The VI can then set the DIO lines to any power on state National Instruments Corporation 2 15 NI 783xR User Manual Chapter 2 Hardware Overview of the NI 783xR Connecting Digital 1 0 Signals gt The DIO signals on the NI 783xR MIO connector are DGND and DIO lt 0 15 gt The DIO signals on the NI 783xR DIO connector are DGND and DIO lt 0 39 gt The DIO lt 0 n gt signals make up the DIO port and DGND is the ground reference signal for the DIO port The NI 7830R has one MIO and
81. xR AI range is fixed at 10 V Connecting Analog Input Signals The AI signals for the NI 783xR are AI lt 0 n gt AI lt 0 n gt AIGND and AISENSE For the NI 7830R n 4 For the NI 7831R 7833R n 8 The Al lt 0 n gt and AI lt 0 n gt signals are connected to the eight AI channels of the NI 783xR For all input modes the AI lt 0 n gt signals are connected to the positive input of the instrumentation amplifier on each channel The signal connected to the negative input of the instrumentation amplifier depends on how you configure the input mode of the device In differential input mode signals connected to AI lt 0 n gt are routed to the negative input of the instrumentation amplifier for each channel In RSE input mode the negative input of the instrumentation amplifier for each channel is internally connected to AIGND In NRSE input mode the AISENSE signal is connected internally to the negative input of the instrumentation amplifier for each channel In DIFF and RSE input modes AISENSE is not used N Caution Exceeding the differential and common mode input ranges distorts the input signals Exceeding the maximum input voltage rating can damage the NI 783xR and the computer NI is not liable for any damage resulting from such signal connections The maximum input voltage ratings are listed in Table B 2 NI 783xR I O Signal Summary AIGND is a common AI signal that is routed directly to the ground tie point on the NI 783x

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