National Instruments 622 Series User Manual

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Chapter 3 Connector and LED Information
Table 3-1. I/O Connector Signals
Signal Name Reference Direction Description
AI GND — — Analog Input Ground—These terminals are the
reference point for single-ended AI measurements
in RSE mode and the bias current return point for
DIFF measurements. All three ground
references—AI GND, AO GND, and
D GND—are connected on the device. Refer to
the Connecting Analog Input Signals section of
Chapter 4, Analog Input.
AI <0..79> Var ie s Input Analog Input Channels—For single-ended
measurements, each signal is an analog input
voltage channel. In RSE mode, AI GND is the
reference for these signals. In NRSE mode, the
reference for each AI <0..15> signal is
AI SENSE; the reference for each AI <16..63>
and AI <64..79> signal is AI SENSE 2
*
.
For differential measurements, AI 0 and AI 8 are
the positive and negative inputs of differential
analog input channel 0. Similarly, the following
signal pairs also form differential input channels:
<AI 1, AI 9>, <AI 2, AI 10>, <AI 3, AI 11>, and
so on.
Refer to the Connecting Analog Input Signals
section of Chapter 4, Analog Input.
AI SENSE,
AI SENSE 2
— Input Analog Input Sense—In NRSE mode, the
reference for each AI <0..15> signal is
AI SENSE; the reference for each AI <16..63>
and AI <64..79> signal is AI SENSE 2
*
. Refer to
the Connecting Analog Input Signals section of
Chapter 4, Analog Input.
AO <0..3> AO GND Output Analog Output Channels—These terminals
supply the voltage output. Refer to the Connecting
Analog Output Signals section of Chapter 5,
Analog Output.
AO GND — — Analog Output Ground—AO GND is the
reference for AO <0..3>. All three ground
references—AI GND, AO GND, and
D GND—are connected on the device. Refer to
the Connecting Analog Output Signals section of
Chapter 5, Analog Output.

National Instruments 622 Series Specifications

General

Brand	National Instruments
Model	622 Series
Category	I/O Systems
Language	English