DeviceNet is a communications interface, NOT a power supply!
A "clean," high-quality, low-noise 24VDC supply must be provided to the DeviceNet communications cable to power the various communication devices. Power for driving anything (valves, actuators, motors, etc) must be run on a separate cable entirely. And often, for high-current actuators, you need three different power supplies: one for communications, one for the outputs of the DeviceNet module, and a separate high-voltage/current supply specifically for the high-load device.
If you attempt to connect a motor directly to your DeviceNet port, you will destroy your MFC card, at a minimum.