connect an external power supply to the NI 9375. The power
supply provides the current for the output channels.
Figure 2. Connecting an Industrial Device to the NI 9375
NI 9375
Device
V
sup
DO
DO COM
External
Power
Supply
+
–
Caution Do not install or remove C Series modules
from your system if the external power supply
connected to the Vsup and COM pins is powered on.
Ensure that the devices you connect to the NI 9375 are
compatible with the output specifications of the NI 9375. Refer to
the device datasheet at ni.com/manuals for output specifications.
Note When the industrial device is off, DO is not
connected to COM. For large source impedances, you
must use a pull-down resistor between DO and COM.
NI 9375 Getting Started Guide | © National Instruments | 13
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