You can connect a variety of industrial devices to the NI-9474, such as the following:
  • Solenoids
  • Motors
  • Actuators
  • Relays
  • Lamps
You must connect an external power supply to the NI-9474. The power supply provides the current for the output channels.
Figure 2. Connecting an Industrial Device to the NI-9474


Caution Do not install or remove C Series modules from your system if any external power supplies that are connected to the Vsup and COM pins are turned on.
Attention Ne pas installer ou retirer les modules de la Série C de votre système si une alimentation externe connectée aux broches Vsup et COM est sous tension.

Ensure that the devices you connect to the NI-9474 are compatible with the output specifications of the NI-9474. Refer to the module specifications at ni.com/docs 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. Go to ni.com/r/cseriesdopulsegen for more information.