National Instruments NI 784xR - Manuals

© National Instruments Corporation v R Series Intelligent DAQ User Manual Contents About This Manual Conventions ................................................................................................................... viiRelated Documentation..................................................

Contents R Series Intelligent DAQ User Manual vi ni.com Types of Signal Sources ................................................................................................ 2-8 Floating Signal Sources .................................................................................. 2-8Ground-Re...

© National Instruments Corporation vii R Series Intelligent DAQ User Manual About This Manual This manual describes the electrical and mechanical aspects of the National Instruments 781 x R/783 x R/784 x R/785 x R devices and contains information about programming and using the devices. Conventions ...

About This Manual R Series Intelligent DAQ User Manual viii ni.com monospace 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, directori...

About This Manual R Series Intelligent DAQ User Manual x ni.com Additional Resources The following documents contain information you might find helpful: • NI Developer Zone tutorial, Field Wiring and Noise Considerations for Analog Signals , at ni.com/zone • PICMG CompactPCI 2.0 R3.0 • PXI Hardware ...

© National Instruments Corporation 1-1 R Series Intelligent DAQ User Manual 1 Introduction This chapter describes the NI 781 x R/783 x R/784 x R/785 x R, the concept of the Reconfigurable I/O (RIO) device, optional software and equipment for using the NI 78 xx R, and safety information about the NI ...

Chapter 1 Introduction R Series Intelligent DAQ User Manual 1-2 ni.com 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 cre...

Chapter 1 Introduction © National Instruments Corporation 1-3 R Series Intelligent DAQ User Manual PXI-specific features are implemented on the J2 connector of the CompactPCI bus. Table 1-2 lists the J2 pins used by the NI PXI-78 xx R. The NI 78 xx R is compatible with any CompactPCI chassis with a ...

Chapter 1 Introduction R Series Intelligent DAQ User Manual 1-4 ni.com Flexible Functionality Flexible functionality allows the NI 78 xx R to match individual application requirements and to mimic the functionality of fixed I/O devices. For example, you can configure an R Series device in one applic...

Chapter 1 Introduction © National Instruments Corporation 1-5 R Series Intelligent DAQ User Manual Reconfigurable I/O Architecture 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 ...

Chapter 1 Introduction R Series Intelligent DAQ User Manual 1-6 ni.com The FPGA does not retain 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 adva...

Chapter 1 Introduction © National Instruments Corporation 1-7 R Series Intelligent DAQ User Manual Note If you use the R Series device without the FPGA Module, you can use the RIO Device Setup utility, available by selecting Start»All Programs»National Instruments» NI-RIO»RIO Device Setup to downloa...

Chapter 1 Introduction R Series Intelligent DAQ User Manual 1-8 ni.com Cables and Accessories 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 1-3. Refer to Appendix A, Connecting I/O Sig...

Chapter 1 Introduction © National Instruments Corporation 1-9 R Series Intelligent DAQ User Manual Custom Cabling NI offers a variety of cables for connecting signals to the NI 78 xx R. If you need to develop a custom cable, a nonterminated shielded cable is available from NI. The SHC68-NT-S connect...

Chapter 1 Introduction R Series Intelligent DAQ User Manual 1-10 ni.com • Pollution Degree 3 means that 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 device i...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-4 ni.com NI 7831R/7833R Overview The NI 7831R/7833R each have eight independent, 16-bit AI channels; eight independent, 16-bit AO channels; 96 bidirectional DIO lines that you can configure individually for input or...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-5 R Series Intelligent DAQ User Manual Input Modes The NI 783 x R/784 x R/785 x R input mode is software configurable. The input channels support three input modes—differential (DIFF), referenced single ended (RSE), a...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-6 ni.com Connecting Analog Input Signals The AI signals for the NI 783 x R/784 x R/785 x R are AI<0.. n >+, AI<0.. n > –, AIGND, and AISENSE. For the NI 7830R, n =4. For the NI 7831R/7833R/784 x R/785 x ...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-7 R Series Intelligent DAQ User Manual Connection of AI signals to the NI 783 x R/784 x R/785 x R depends on the input mode of the AI channels you are using and the type of input signal source. With different input mo...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-8 ni.com 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 descr...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-10 ni.com Differential Connection Considerations (DIFF Input Mode) In DIFF input mode, the NI 783 x R/784 x R/785 x R measures the difference between the positive and negative inputs. DIFF input mode is ideal for me...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-11 R Series Intelligent DAQ User Manual Differential Connections for Ground-Referenced Signal Sources Figure 2-6 shows how to connect a ground-referenced signal source to a channel on the NI 783 x R/784 x R/785 x R co...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-12 ni.com Differential Connections for Nonreferenced or Floating Signal Sources Figure 2-7 shows how to connect a floating signal source to a channel on the NI 783 x R/784 x R/785 x R configured in DIFF input mode. ...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-13 R Series Intelligent DAQ User Manual 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 sam...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-14 ni.com Use DIFF input connections for greater signal integrity for any input signal that does not meet the preceding conditions. You can configure the NI 783 x R/784 x R/785 x R channels in software for RSE or NR...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-15 R Series Intelligent DAQ User Manual 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 783 x R/784 ...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-16 ni.com Common-Mode Signal Rejection Considerations Figure 2-6 and Figure 2-9 show connections for signal sources that are already referenced to some ground point with respect to the NI 783 x R/784 x R/785 x R. In...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-17 R Series Intelligent DAQ User Manual Connecting Analog Output Signals The AO signals are AO <0.. n > and AOGND. AO <0.. n > are the AO channels. AOGND is the ground reference signal for the AO channels....

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-18 ni.com NI 7830R has one RMIO and one RDIO connector for a total of 56 DIO lines. The NI 7831R/7833R/784 x R/785 x R has one RMIO and two RDIO connectors for a total of 96 DIO lines. Refer to Figure A-1, NI 781x R...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-21 R Series Intelligent DAQ User Manual RTSI Trigger Bus The NI 78 xx R 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 t...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-23 R Series Intelligent DAQ User Manual Figure 2-12. 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 ...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-27 R Series Intelligent DAQ User Manual Figure 2-16. Switch Location on the NI PXI-783 x R Figure 2-17. Switch Settings Complete the following steps to prevent a VI stored in flash memory from loading to the FPGA: 1. ...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-28 ni.com 3. Move SW1 to the ON position, as shown in Figure 2-17b. 4. Reinsert the NI 781 x R/783 x R into the PXI/CompactPCI chassis or PCI computer. Refer to the Installing the Hardware section of the Getting Sta...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-29 R Series Intelligent DAQ User Manual (NI 784 x R/785 x R Devices) All NI 784 x R/785 x R devices have a user-replaceable socketed fuse to protect the supply from overcurrent conditions. When an overcurrent conditio...

Chapter 2 Hardware Overview of the NI 78x x R R Series Intelligent DAQ User Manual 2-30 ni.com 3. Replace the broken fuse while referring to Figure 2-18 for the fuse locations. Figure 2-18. NI 784 x R/785 x R Replacement Fuse Location 4. Reinstall the PCI or PXI device into the computer or PXI chass...

Chapter 2 Hardware Overview of the NI 78x x R © National Instruments Corporation 2-31 R Series Intelligent DAQ User Manual Field Wiring Considerations (NI 783 x R/784 x R/785 x R Only) Environmental noise can seriously affect the measurement accuracy of the device if you do not take proper care when...

© National Instruments Corporation 3-1 R Series Intelligent DAQ User Manual 3 Calibration (NI 783 x R/784 x R/785 x R Only) Calibration is the process of determining and/or adjusting the accuracy of an instrument to minimize measurement and output voltage errors. On the NI 783 x R/784 x R/785 x R, o...

Chapter 3 Calibration (NI 783x R/784x R/785x R Only) R Series Intelligent DAQ User Manual 3-2 ni.com 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 channel...

Chapter 3 Calibration (NI 783x R/784x R/785x R Only) © National Instruments Corporation 3-3 R Series Intelligent DAQ User Manual To externally calibrate your device, use an external reference several times more accurate than the device itself. For more information on externally calibrating your NI 7...

Appendix A Connecting I/O Signals © National Instruments Corporation A-7 R Series Intelligent DAQ User Manual Figure A-3 shows the connector pinouts when using the NSC68-262650 cable. Figure A-3. Connector Pinouts when Using NSC68-262650 Cable Connecting to SSR Digital Signal Conditioning NI provide...

Appendix C Technical Support and Professional Services R Series Intelligent DAQ User Manual C-2 ni.com • 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 pro...

© National Instruments Corporation G-1 R Series Intelligent DAQ User Manual Glossary Symbol Prefix Value p pico 10 – 12 n nano 10 – 9 µ micro 10 – 6 m milli 10 – 3 k kilo 10 3 M mega 10 6 G giga 10 9 Numbers/Symbols ° Degrees. > Greater than. ≥ Greater than or equal to. < Less than. ≤ Less tha...