Pollution Degree
2
Maximum altitude
2,000 m
Indoor use only.
Note
Refer to the device datasheet on
for complete
specifications.
Connecting the NI 9401
The NI 9401 provides connections for 8 digital input/output channels.
Figure 2.
NI 9401 Pinout
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
NC
COM
COM
DIO0
NC
DIO1
DIO2
NC
DIO3
DIO4
NC
DIO5
DIO6
NC
DIO7
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
NI 9401 Signals
Table 1.
Signal Descriptions
Signal
Description
COM
Common reference connection to isolated
ground
DIO
Digital input/output signal connection
NC
No connection
Ports
The DIO channels are grouped in two ports, one containing channels 0, 1, 2, and 3,
and one containing channels 4, 5, 6, and 7. You can independently configure each
digital port in software for input or output. Note that all four channels in the port
must share the same line direction.
ni.com
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NI-9401
Summary of Contents for NI 9401
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