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NI USB-9472 User Guide and Specifications 12 ni.com
Figure 7. Pin Assignments
Connecting Devices to the NI USB-9472
The NI USB-9472 has current sourcing outputs, meaning the DO terminal
or pin drives current or applies voltage to the device to which it is
connected.
You can connect sinking-input devices, such as NPN, open collectors,
normally high, IEC negative logic, or other DC devices to the
NI USB-9472. A sinking-input device provides a path to ground for current
or voltage. Make sure the device you connect to the NI USB-9472 meets
the module specifications. Refer to the Specifications section for more
information about the output specifications of the module.
Connect the device to DO on the NI USB-9472. Connect the common of
the device to COM. Figure 8 shows a possible configuration.
COM
Vsup
COM
COM
Vsup
COM
COM
Vsup
COM
COM
Vsup
COM
COM
DO0
Vsup
DO1
DO2
Vsup
DO3
DO4
Vsup
DO5
DO6
Vsup
DO7
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
03
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