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NI 9207E Operating Instructions and Specifications
10
ni.com
Connecting Current Channels
You can connect an external power supply to the NI 9207E. This
power supply provides the current for the devices you connect to
the module. Connect the positive lead of the power supply to a
V
sup
pin and the negative lead of the power supply to COM. Install
a 2 A maximum, fast-acting fuse between the external power
supply and the V
sup
more information about the V
sup
pins.
Note
The V
sup
pins are internally connected to each
other. You can connect only one external voltage supply
to the device.
Caution
Do
not
remove or insert modules if the external
power supply connected to the V
sup
and COM pins is
powered on.
You can connect single-ended current signals to the NI 9207E,
including loop-powered and three-wire current transducers.
Connect the output of the current signal to the AI pin of the channel
and the voltage supply of the current signal to V
sup
. For a
three-wire transducer, also connect the common of the device to
COM. Refer to Figures 7 and 8 for illustrations of how to connect
loop-powered and three-wire current transducers to the NI 9207E.