Appendix B Connecting I/O Signals
© National Instruments Corporation B-3 NI 783xR User Manual
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Caution Connections that exceed any of the maximum ratings of input or output signals

on the NI7 83xR can damage the NI 783xR and the computer. Maximum input ratings for each signal are in the Protection column of TableB-2. NI is not liable for any damage resulting from such signal connections

Table B-1. I/O Connector Signal Descriptions

Signal Name Reference Direction Description
+5V DGND Output +5 VDC Source—These pins supply 5V from the computer
power supply using a self-resetting 1A fuse. No more than
250mA should be pulled from a single pin.
AI<0..7>+ AIGND Input Positive input for Analog Input channels 0 through 7.
AI<0..7>– AIGND Input Negative input for Analog Input channels 0 through 7.
AIGND — — Analog Input Ground—These pins are the reference point for
single-ended measurements in RSE configuration and the
bias current return point for differential measurements.
Allthree ground references—AIGND, AOGND, and
DGND—are connected to each other on the NI 783xR.
AISENSE AIGND Input Analog Input Sense—This pin serves as the reference node
for AI <0..7> when the device is configured for NRSE mode.
AO<0..7> AOGND Output Analog Output channels 0 through 7. Each channel can
source or sink up to 2.5mA.
AOGND — — Analog Output Ground—The analog output voltages
arereferenced to this node. All three ground
references—AIGND, AOGND, and DGND—are
connectedto each other on the NI 783xR.
DGND — — Digital Ground—These pins supply the reference for the
digital signals at the I/O connector and the 5V supply.
Allthree ground references—AIGND, AOGND, and
DGND—are connected to each other on the NI 783xR.
DIO<0..15>
Connector 0
DIO<0..39>
Connector <1..2>
DGND Input or
Output
Digital I/O signals.