Digital Output Module Operating Instructions and Specifications

Each channel has a DO pin to which you can connect a digital input

device. The 32 digital output channels are internally referenced to

COM.

Yo u must connect an external power supply to the NI 9476. The

power supply provides the current for the output channels. Connect

the positive lead of the power supply to the supply pin, V

sup

, and

the negative lead of the power supply to the common pin, COM.

Refer to the Specifications section for information about the power

supply voltage range.

Note The V

sup

pins are internally connected. 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.

The NI 9476 has current sourcing outputs, meaning the DO pin is

driven to V

sup

when the channel is turned on.