NI 9401 Operating Instructions and Specifications
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© National Instruments
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9
Connecting the NI 9401
The NI 9401 has a 25-pin DSUB connector that provides
connections for eight digital input/output channels.
Figure 2.
NI 9401 Pin
Assignments
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
DIO0
NC
DIO1
DIO2
NC
DIO
3
DIO4
NC
DIO5
DIO6
NC
DIO7
1
2
3
4
5
6
7
8
9
10
11
12
1
3
14
15
16
17
1
8
19
20
21
22
2
3
24
25