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© 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