National Instruments Isolated Analog Input Device NI PXI-4224 - Manual (Page 5)

© National Instruments Corporation v NI PXI-4224 User Manual
Contents
Chapter 1
About the NI PXI-4224
What You Need to Get Started ......................................................................................1-2
National Instruments Documentation ............................................................................1-3
Installing the Application Software, NI-DAQ, and the DAQ Device ...........................1-3
Installing the NI PXI-4224 ............................................................................................1-4
LED Pattern Descriptions ..............................................................................................1-4
Chapter 2
Connecting Signals
Connecting Signals to the NI PXI-4224 ........................................................................2-1
Front Signal Connector....................................................................................2-1
Analog Input Connections ...............................................................................2-3
Floating Signal Source Connection...................................................2-11
Ground-Referenced Signal Connection ............................................2-12
Shielded Ground-Referenced Signal Connection
(Recommended) .............................................................................2-12
Chapter 3
Configuring and Testing
Verifying and Self-Testing the Signals Using Test Panels............................................3-1
Configuring the NI PXI-4224 in MAX..........................................................................3-2
Creating a Voltage Task or Global Channel Using NI-DAQmx.....................3-2
Verifying and Self-Testing an NI-DAQmx Task or Global Channel..............3-3
Chapter 4
Theory of Operation
Theory of Operation.......................................................................................................4-1
Signal Conditioning Functional Overview......................................................4-3
Measurement Considerations ..........................................................................4-3
Input Impedance................................................................................4-3
Common-Mode Rejection Ratio .......................................................4-4
Effective CMR ..................................................................................4-5
Timing and Control Functional Overview ......................................................4-5
Programmable Function Inputs .......................................................................4-6
Device and PXI Clocks ...................................................................................4-7