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National Instruments Corporation
11
NI USB-9201/9221 User Guide and Specifications
Each channel has a terminal or pin, AI, to which you can connect a voltage
signal. The NI USB-9201/9221 also has a common terminal or pin, COM,
that is internally connected to the isolated ground reference of the module.
Refer to Table 3 for the terminal assignments of the NI USB-9201/9221
with screw terminal. Refer to Figure 7 for the pin assignments of the
NI USB-9201/9221 with D-SUB.
Table 3.
Terminal Assignments
Module
Terminal
Signal
0
AI 0
1
AI 1
2
AI 2
3
AI 3
4
AI 4
5
AI 5
6
AI 6
7
AI 7
8
No connection
9
Common (COM)
0
1
2
3
4
5
6
7
8
9