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Contents Multifunction Reconfigurable I/O U ser Manual vi ni.com Input Modes .......... .............. .............. ............... .............. ........... .............. .............. ......... 2 -8 Differential C…
© National Instruments Corporation v Multifunction Reconfigurable I/O User Manual
Contents
About This Manual
Conventions ...................................................................................................................ix
Related Documentation..................................................................................................x
Software Documentation .................................................................................x
Device-Specific Documentation......................................................................xi
Additional Resources.......................................................................................xi
Chapter 1
Introduction
About the Reconfigurable I/O Device ...........................................................................1-1
Using PXI with CompactPCI.........................................................................................1-2
Overview of Reconfigurable I/O ...................................................................................1-3
Reconfigurable I/O Concept............................................................................1-3
Flexible Functionality .......................................................................1-4
User-Defined I/O Resources .............................................................1-4
Device-Embedded Logic and Processing .........................................1-4
Reconfigurable I/O Architecture .....................................................................1-5
Reconfigurable I/O Applications.....................................................................1-6
Software Development ..................................................................................................1-6
LabVIEW FPGA Module................................................................................1-6
LabVIEW Real-Time Module.........................................................................1-7
Cables and Accessories..................................................................................................1-8
Custom Cabling .............................................................................................................1-8
Chapter 2
Hardware Overview of the NI 78xx
NI 7811 Overview .........................................................................................................2-3
NI 7813 Overview .........................................................................................................2-3
NI 7830 Overview .........................................................................................................2-3
NI 7831/7833 Overview ................................................................................................2-4
NI 784x Overview .........................................................................................................2-4
NI 785x Overview .........................................................................................................2-4
Analog Input (NI 783x/784x/785x Only)......................................................................2-4
Input Modes.....................................................................................................2-5
Input Range .....................................................................................................2-5
Connecting Analog Input Signals ..................................................................................2-5
Types of Signal Sources ................................................................................................2-8
Floating Signal Sources...................................................................................2-8
Ground-Referenced Signal Sources ................................................................2-8
Contents
Multifunction Reconfigurable I/O User Manual vi ni.com
Input Modes................................................................................................................... 2-8
Differential Connection Considerations (DIFF Input Mode) ......................... 2-10
Differential Connections for Ground-Referenced Signal Sources.................. 2-11
Differential Connections for Nonreferenced or Floating Signal Sources ....... 2-12
Single-Ended Connection Considerations ...................................................... 2-13
Single-Ended Connections for Floating Signal Sources (RSE Input Mode) .. 2-14
Single-Ended Connections for Grounded Signal Sources (NRSE Input
Mode)............................................................................................. 2-15
Common-Mode Signal Rejection Considerations........................................... 2-16
Analog Output ............................................................................................................... 2-16
Connecting Analog Output Signals ............................................................................... 2-17
Digital I/O...................................................................................................................... 2-17
Connecting Digital I/O Signals ..................................................................................... 2-17
RTSI Trigger Bus .......................................................................................................... 2-21
PXI Local Bus (PXI-781x/783x Only).......................................................................... 2-21
Switch Settings (NI 781x/783x Only)........................................................................... 2-23
+5 V Power Source........................................................................................................ 2-26
Device Fuse Replacement (NI 784x/785x Only)............................................ 2-27
PCI Express Device Disk Drive Power Connector ....................................................... 2-28
When to Use the Disk Drive Power Connector .............................................. 2-28
Disk Drive Power Connector Installation ....................................................... 2-29
Field Wiring Considerations (NI 783x/784x/785x Only) ............................................. 2-30
Chapter 3
Calibration (NI 783x /784x /785x Only)
Loading Calibration Constants ...................................................................................... 3-1
Self-Calibration ............................................................................................................. 3-1
External Calibration....................................................................................................... 3-2
Appendix A
Connecting I/O Signals
Appendix B
Using the SCB-68 Shielded Connector Block
Appendix C
Technical Support and Professional Services
Glossary
© National Instruments Corporation ix Multifunction Reconfigurable I/O User Manual
About This Manual
This manual describes the electrical and mechanical aspects, as well as the
programming and usage information, for the following devices:
• PCI/PXI-7811
• PCI/PXI-7813
• PCI/PXI-7830
• PCI/PXI-7831
• PCI/PXI-7833
• PCIe/PXI-7841
• PCIe/PXI-7842
• PCIe/PXI-7851
• PCIe/PXI-7852
• PXI-7853
• PXI-7854
Conventions
The following conventions appear in this manual:
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 a
product, refer to the Read Me First: Safety and Electromagnetic
Compatibility document for information about precautions to take.
When symbol is marked on a product, it denotes a warning advising you to
take precautions to avoid electrical shock.
When symbol is marked on a product, it denotes a component that may be
hot. Touching this component may result in bodily injury.
NI 78xx Refers to PCI/PXI-7811, PCI/PXI-7813, PCI/PXI-7831, PCI/PXI-7833,
PCIe/PXI-7841, PCIe/PXI-7842, PCIe/PXI-7851, and PCIe/PXI-7852
devices.
NI 781x Refers to PCI/PXI-7811 and PCI/PXI-7813 devices.