National Instruments NI-9375 Getting Started page 6

Table 2. Signal Descriptions
Signal
DI
DI COM
DO
DO COM
NC
V
sup
NI-9375 with DSUB Pinout
6
ni.com
Description
Digital input signal connection
Common reference connection for the digital
inputs
Digital output signal connection
Common reference connection for the digital
outputs
No connection
Voltage supply connection
NI-9375 Getting Started