National Instruments NI PXI-7831R User Manual page 57

Appendix B Connecting I/O Signals
Signal Name
+5V
AI<0..7>+
AI<0..7>–
AIGND
AISENSE
AO<0..7>
AOGND
DGND
DIO<0..15>
Connector 0
DIO<0..39>
Connector<1..2>
Caution Connections that exceed any of the maximum ratings of input or output signals
on the NI PXI-7831R can damage the NI PXI-7831R and the computer. Maximum input
ratings for each signal are given in the Protection column of Table B-2. NI is not liable for
any damage resulting from such signal connections
NI PXI-7831R User Manual
Table B-1. I/O Connector Signal Descriptions
Reference Direction
DGND Output
AIGND Input
AIGND Input
— —
AIGND Input
AOGND Output
— —
— —
DGND Input or
Output
.
+5 VDC Source—These pins supply +5 V from the computer
power supply using a self-resetting 1 A fuse. No more than
250 mA should be pulled from a single pin.
Positive Input for Analog Channels 0 through 7.
Negative Input for Analog Channels 0 through 7.
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.
All three ground references—AIGND, AOGND, and
DGND—are connected together on the NI PXI-7831R.
Analog Input Sense—This pin serves as the reference node
for channels AI<0..7> when the device is configured for
NRSE mode.
Analog Output Channels 0 through 7. Each channel can
source or sink up to 5 mA.
Analog Output Ground—The analog output voltages
are referenced to this node. All three ground
references—AIGND, AOGND, and DGND—are
connected together on the NI PXI-7831R.
Digital Ground—These pins supply the reference for the
digital signals at the I/O connector as well as the +5 V supply.
All three ground references—AIGND, AOGND, and
DGND—are connected together on the NI PXI-7831R.
Digital I/O signals.
B-4
Description
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