Справочник Пользователя для National Instruments NI 781xR

end of the cable into the appropriate I/O connector and connect the other 
end of the cable to the appropriate signal accessory.

 

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

on the NI 781xR can damage the NI 781xR and the computer. Maximum input ratings for 
each signal are given in the Protection (Volts) On/Off column of Table B-2. NI is not liable 
for any damage resulting from such signal connections.

 

You can use the CompactRIO R Series Expansion chassis and CompactRIO 
I/O modules with the NI 781xR. Refer to the CompactRIO R Series 
Expansion System Installation Instructions for information about 
connecting the chassis to the NI 781xR.

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.

DGND

—

—

Digital Ground—These pins supply the reference for the 
digital signals at the I/O connector as well as the 5 V supply.

DIO<0..39> 

DGND

Input or 

Output

Digital I/O signals.

Table B-2.  NI 781xR I/O Signal Summary

+5V

DO

—

—

—

—

—

—

DGND

DO

—

—

—

—

—

—

DIO<0..39>
Connector<0..3> 

DIO

—

–0.5 to +7.0

5.0 at 2.4

5.0 at 0.4

12 ns

—

DIO = Digital Input/Output

DO = Digital Output