National Instruments NI 7831R user manual Contents

© 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