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10 User’s Guide

I/O Connector Signal Descriptions

The following table describes the signals found on the I/O

connectors. The information is based on documentation provided in

the National Instruments E Series help ﬁle (http://sine.ni.com/nips/cds/

view/p/lang/en/nid/1038).

NOTE: The ﬁrst two signals (SENSOR EXC and A1) have been

added to the original chart to show the additional functions of the DAQ

Expansion Pod.

Signal

name

Reference Direction Description

Addition to the DAQ Expansion Pod

SENSOR

EXC

AO GND Output Sensor Excitation—This pin

provides up to 200mA excitation

current, driven by the voltage

output of AO channel 0. The

output follows a one-to-one

relationship with the voltage

applied to AO channel 0. Voltage

must be maintained between 0

and 4.8V. Do NOT allow negative

voltages and never exceed output

voltage of 4.8V.

Signal with reduced functionality for the DAQ Expansion Pod

AI <0..6,

8..14>

AI GND Input AI Channels 0 through 6 and 8

through 14—You can conﬁgure

each channel pair, AI <i, i+8>

(i = 0..7), as either one differential

input or two single-ended inputs.

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

Chapter 5: Signal Descriptions

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