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National Instruments Corporation
11
NI USB-9472 User Guide and Specifications
You must connect an external power supply to the NI USB-9472. This
power supply provides the current for the devices you connect to the
module. Connect the positive lead of the power supply to the supply
terminal or pin, V
sup
, and the negative lead of the power supply to the
common terminal or pin, COM. The eight digital output channels are
internally referenced to COM. Refer to Table 3 for the terminal
assignments of the NI USB-9472 with screw terminal. Refer to Figure 7 for
the pin assignments of the NI USB-9472 with D-SUB.
Table 3.
Terminal Assignments
Module
Terminal
Signal
0
DO0
1
DO1
2
DO2
3
DO3
4
DO4
5
DO5
6
DO6
7
DO7
8
Supply (V
sup
)
9
Common (COM)
0
1
2
3
4
5
6
7
8
9
0
3
4
7