National Instruments NI 783xR 用户手册

© National Instruments Corporation

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Connections that exceed any of the maximum ratings of input or output signals 

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

Table B-1.  I/O Connector Signal Descriptions

+5V

DGND

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.

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. 
All three 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 2.5 mA.

AOGND

—

—

Analog Output Ground—The analog output voltages 
are referenced to this node. All three ground 
references—AIGND, AOGND, and DGND—are 
connected to 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 5 V supply. 
All three 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.