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© National Instruments Corporation v NI 7831R User Manual
Contents
About This Manual
Conventions ...................................................................................................................vii
Reconfigurable I/O Documentation...............................................................................viii
Related Documentation..................................................................................................ix
Chapter 1
Introduction
About the NI 7831R.......................................................................................................1-1
Using PXI with CompactPCI.........................................................................................1-2
Overview of Reconfigurable I/O ...................................................................................1-3
Reconfigurable I/O Concept............................................................................1-3
Flexible Functionality .......................................................................1-3
User-Defined I/O Resources .............................................................1-4
Device-Embedded Logic and Processing .........................................1-4
Reconfigurable I/O Architecture.....................................................................1-4
Reconfigurable I/O Applications.....................................................................1-5
Software Development ..................................................................................................1-5
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 7831R
Analog Input ..................................................................................................................2-3
Input Modes.....................................................................................................2-4
Input Range .....................................................................................................2-4
Connecting Analog Input Signals..................................................................................2-5
Types of Signal Sources ................................................................................................2-7
Floating Signal Sources...................................................................................2-7
Ground-Referenced Signal Sources ................................................................2-7
Input Modes...................................................................................................................2-7
Differential Connection Considerations (DIFF Input Mode)..........................2-9
Differential Connections for Ground-Referenced Signal Sources....2-9
Differential Connections for Nonreferenced
or Floating Signal Sources .............................................................2-10