A network communication module is ...

• A. A controller that coordinates communication from controller to controller on a network and provides a location for an operator interface.
• B. A device that stores programs.
• C. A module that powers the network.
• D. A sensor module.

Answer: (A)

A network communication module serves as the central hub in a networked control system. Its main job is to coordinate how controllers talk to each other over the network, ensuring data is routed to the right places and using the right protocols. It also provides a location or path for an operator interface to connect, so plant personnel can monitor and interact with the system from a single access point.

This fits because the module handles inter-controller communication and accessibility for the operator interface. It isn’t where programs are stored—that’s the controller’s job—nor does it power the network—that would be a power supply module. It also isn’t a sensor module, which would be dedicated to measuring process variables.