Related Manuals for National Instruments NI 783xR
Summary of Contents for National Instruments NI 783xR
- Page 1 Reconfigurable I/O NI 783xR User Manual Reconfigurable I/O Devices for PCI/PXI/CompactPCI Bus Computers NI 783xR User Manual May 2005 370489C-01...
- Page 2 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. © 2003–2005 National Instruments Corporation. All rights reserved.
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Page 3: Important Information
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. - Page 4 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 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...
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Page 5: Table Of Contents
LabVIEW FPGA Module...1-5 LabVIEW Real-Time Module...1-6 Cables and Optional Equipment ...1-7 Custom Cabling ...1-8 Safety Information ...1-9 Chapter 2 Hardware Overview of the NI 783xR NI 7830R Overview...2-2 NI 7831R/7833R Overview ...2-2 Analog Input ...2-2 Input Modes...2-3 Input Range ...2-4 Connecting Analog Input Signals ...2-4... - Page 6 Loading Calibration Constants ... 3-1 Internal Calibration... 3-1 External Calibration... 3-2 Appendix A Specifications Appendix B Connecting I/O Signals Appendix C Using the SCB-68 Shielded Connector Block Appendix D Technical Support and Professional Services Glossary NI 783xR User Manual ni.com...
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Page 7: About This Manual
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 NI 783xR refers to all PXI and PCI R Series devices with analog and digital I/O. © National Instruments Corporation Safety Information... -
Page 8: Reconfigurable I/O Documentation
About This Manual Reconfigurable I/O 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. -
Page 9: Related Documentation
• © National Instruments Corporation 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 About This Manual NI 783xR User Manual... -
Page 10: Introduction
• 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. -
Page 11: Using Pxi With Compactpci
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. -
Page 12: Overview Of Reconfigurable I/O
I/O resources on the NI 783xR. Reconfigurable I/O 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. -
Page 13: User-Defined I/O Resources
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. NI 783xR User Manual FPGA Bus Interface Figure 1-1. High-Level FPGA Functional Overview... -
Page 14: Reconfigurable I/O Applications
<LabVIEW>\examples\FPGA 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. -
Page 15: Labview Real-Time Module
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 to the LabVIEW Real-Time Module. -
Page 16: Cables And Optional Equipment
Cables and Optional Equipment 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. Cable Cable Description SH68-C68-S Shielded 68-pin VHDCI male connector to female 0.050 series D-type... -
Page 17: Custom Cabling
Custom Cabling 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. -
Page 18: Safety Information
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. - Page 19 Introduction to the system. Remove power from signal lines before connecting them to or disconnecting them from the NI 783xR. Operate the NI 783xR at or below the measurement category section Measurement circuits are subjected to working voltages stresses (overvoltage) from the circuit to which they are connected during measurement or test.
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Page 20: Hardware Overview Of The Ni 783Xr
NI 783xR This chapter presents an overview of the hardware functions and I/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. -
Page 21: Ni 7830R Overview
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... -
Page 22: Input Modes
The negative input pin connects to the negative input of the instrumentation amplifier. 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. -
Page 23: Input Range
Table B-2, AIGND is a common AI signal that is routed directly to the ground tie point on the NI 783xR. You can use this signal for a general analog ground tie point to the NI 783xR if necessary. - Page 24 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 section of this chapter for more information about these input modes.
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Page 25: Types Of Signal Sources
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. - Page 26 AI< i > – AISENSE – AIGND< i > Figure 2-4. Summary of Analog Input Connections Chapter 2 Hardware Overview of the NI 783xR Grounded Signal Source Examples • Plug-in Instruments with Nonisolated Outputs AI< i >(+) – AI< i >(–) –...
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Page 27: Differential Connection Considerations (Diff Input Mode)
Hardware Overview of the NI 783xR Differential Connection Considerations (DIFF Input Mode) 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... -
Page 28: Differential Connections For Nonreferenced Or Floating Signal Sources
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 V 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. - Page 29 Chapter 2 Hardware Overview of the NI 783xR Bias Resistors Floating (see text) Signal Source – Bias Current Return Paths I/O Connector 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...
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Page 30: Single-Ended Connection Considerations
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. -
Page 31: Single-Ended Connections For Floating Signal Sources (Rse Input Mode)
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. -
Page 32: Common-Mode Signal Rejection Considerations
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. -
Page 33: Analog Output
Hardware Overview of the NI 783xR Analog Output 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. -
Page 34: Digital I/O
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. - Page 35 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.
- Page 36 LED shown in Figure 2-10. The NI 783xR SH68-C68-S shielded cable contains 34 twisted pairs of 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.
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Page 37: Rtsi Trigger Bus
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<0..6>... -
Page 38: Pxi Local Bus (For Ni Pxi-783Xr Only)
Do not drive the same RTSI trigger bus line with the NI 783xR and another device Caution 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»VI, Function, &... -
Page 39: Switch Settings
Slots <3..15> using the PXI/LBLSTAR<0..12>. Each device receives its trigger signal on its own dedicated star trigger line. Do not configure the NI 783xR and another device to drive the same physical star Caution trigger line simultaneously. Such signal driving can damage the NI 783xR and the other device. - Page 40 Chapter 2 Hardware Overview of the NI 783xR SW1, SW2, SW3 Figure 2-11. Switch Location on the NI PXI-783xR © National Instruments Corporation 2-21 NI 783xR User Manual...
- Page 41 Normal Operation (Default) Figure 2-13. Switch Settings Power off and unplug the PXI/CompactPCI chassis or PCI computer. Remove the NI 783xR from the PXI/CompactPCI chassis or PCI computer. Move SW1 to the ON position, as shown in Figure 2-13b.
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Page 42: Power Connections
Caution 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 Reinsert the NI 783xR into the PXI/CompactPCI chassis or PCI computer. -
Page 43: Field Wiring Considerations
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 a reasonable distance if they run in parallel or run the lines at right angles to each other. -
Page 44: Calibration
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. -
Page 45: External Calibration
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. -
Page 46: Specifications
Specifications This appendix lists the specifications of the NI 783xR. These specifications are typical at 25 °C unless otherwise noted. Analog Input Input Characteristics Number of channels Input modes... DIFF, RSE, NRSE Type of ADC... Successive approximation Resolution ... 16 bits, 1 in 65,536 Conversion time ... -
Page 47: Dynamic Characteristics
DNL ...–1.0 to +2.0 LSB max No missing codes resolution...16 bits typ, 15 bits min CMRR, DC to 60 Hz ...86 dB Dynamic Characteristics Bandwidth System noise ...1.8 LSB NI 783xR User Manual Absolute Accuracy Noise + Quantization (µV) Offset... -
Page 48: Output Characteristics
Step Size 16 LSB ±20.0 V µ ±2.0 V µ ±0.2 V µ NI 7830R... 4 NI 7831R... 8 NI 7833R... 8 Appendix A Specifications Accuracy 4 LSB 2 LSB µ µ 10.3 µ µ µ µ NI 783xR User Manual... - Page 49 Range ...±10 V Output coupling ...DC Output impedance...1.25 Ω Current drive...±2.5 mA Protection...Short-circuit to ground Power-on state ...User configurable Dynamic Characteristics Settling time NI 783xR User Manual Absolute Accuracy % of Reading 24 Hours 1 Year Offset ( 0.0335 0.0351 ±...
- Page 50 Output ... Short-circuit (up to eight lines Appendix A Specifications µ µ , DC to 1 MHz µ 0.0 V 0.8 V 2.0 V 5.5 V — 0.4 V 2.4 V — may be shorted at a time) NI 783xR User Manual...
- Page 51 Clock (NI PXI-783xR only) ...Adds 350 ps jitter, 300 ps skew Additional frequency dependent jitter Calibration Recommended warm-up time...15 minutes Calibration interval ...1 year NI 783xR User Manual NI 7830R ...5,120 NI 7831R ...5,120 NI 7833R ...14,336 NI 7830R ...11,520 NI 7831R ...11,520...
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Page 52: Bus Interface
Onboard calibration reference Refer to Calibration Certificates at Note calibration certificate for the NI 783xR. Bus Interface PXI (NI PXI-783xR only) ... Master, slave PCI (NI PCI-783xR only) ... Master, slave Power Requirement +5 VDC (±5%) +3.3 VDC (±5%) To calculate the total current sourced by the digital outputs use the following equation: Where j is the number of digital outputs being used to source current. -
Page 53: Operating Environment
Maximum working voltage refers to the signal voltage plus the common-mode voltage. Channel-to-earth ...±12 V, Measurement Category I Channel-to-channel...±24 V, Measurement Category I Do not use the NI 783xR for connection to signals in Measurement Categories II, Caution III, or IV. Environmental The NI 783xR is intended for indoor use only. -
Page 54: Storage Environment
IEC-60068-2-1 and IEC-60068-2-2 tested in accordance with IEC-60068-2-56 Tested in accordance with IEC-60068-2-27. Test profile developed in accordance with MIL-PRF-28800F. Tested in accordance with IEC-60068-2-64. Nonoperating test profile exceeds the requirements of MIL-PRF-28800F, Class 3. NI 783xR User Manual... -
Page 55: Electromagnetic Compatibility
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: • • • Refer to the product label, or visit Note number or product line, and click the appropriate link in the Certification column for UL and other safety certifications. - Page 56 Connecting I/O 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).
- Page 57 Connecting I/O 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 <1..2> on the NI 7831R/7833R. 68 34...
- Page 58 Connections that exceed any of the maximum ratings of input or output signals Caution 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 ©...
- Page 59 Connecting to CompactRIO Extension I/O Chassis 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.
- Page 60 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.
- Page 61 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 headers directly into an 8-, 16-, 24-, or 32-channel SSR backplane for digital signal conditioning.
- Page 62 Appendix B Connecting I/O Signals DIO39 DIO38 DIO37 DIO36 DIO35 DIO34 DIO33 DIO32 DGND DIO31 DGND DIO30 DGND DIO29 DGND DIO28 DGND DIO27 DGND DIO26 DGND DIO25 DGND DIO24 DGND DGND DIO 24–39 Connector Pin Assignment NI 783xR User Manual...
- Page 63 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.
- Page 64 Technical Support and Professional Services Visit the following sections of the National Instruments Web site at ni.com • • • • © National Instruments Corporation for technical support and professional services: Support—Online technical support resources at include the following: –...
- Page 65 Worldwide Offices section of office Web sites, which provide up-to-date contact information, support phone numbers, email addresses, and current events. NI 783xR User Manual Calibration Certificate—If your product supports calibration, you can obtain the calibration certificate for your product at ni.com/calibration...
- Page 66 < Less than. ≤ Less than or equal to. – Negative of, or minus. Ω Ohms. Per. Percent. ± Plus or minus. Positive of, or plus. © National Instruments Corporation Value –12 –9 – 6 –3 NI 783xR User Manual...
- Page 67 Application-Specific Integrated Circuit—A proprietary semiconductor component designed and manufactured to perform a set of specific functions. bipolar A signal range that includes both positive and negative values (for example, –5 to +5 V). NI 783xR User Manual © National Instruments Corporation...
- Page 68 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. DGND Digital ground signal. DIFF Differential mode. © National Instruments Corporation Glossary NI 783xR User Manual...
- Page 69 FPGA VI A configuration that is downloaded to the FPGA and that determines the functionality of the hardware. glitch An unwanted signal excursion of short duration that is usually unavoidable. Hour. Hardware-in-the-loop. Hertz. NI 783xR User Manual © National Instruments Corporation...
- Page 70 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. © National Instruments Corporation Glossary NI 783xR User Manual...
- Page 71 (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. NI 783xR User Manual © National Instruments Corporation...
- Page 72 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. © National Instruments Corporation Glossary NI 783xR User Manual...
- Page 73 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. waveform Multiple voltage readings taken at a specific sampling rate. NI 783xR User Manual © National Instruments Corporation...