Allen-Bradley 20-COMM-C ControlNet Interface Module

The Allen-Bradley 20-COMM-C ControlNet Interface Module is a coaxial ControlNet adapter that lets PowerFlex drives join a ControlNet network and exchange deterministic I/O and status data. It plugs into the drive’s Drive Peripheral Interface (DPI) via an Internal Interface Cable and sits in the drive’s communication bay, serving as the network interface to the ControlNet backbone. This Rev 08 module carries firmware FRN 1.006 and is part of the 20-COMM-C family designed for ControlNet-enabled PowerFlex drives. On the network, it handles the drive’s ControlNet messaging, node addressing, and data exchange with other devices, enabling coordinated control without requiring an external gateway. Common applications include integrating PowerFlex drives into existing ControlNet architectures for precise speed and torque control, real-time monitoring, and diagnostic data aggregation on manufacturing lines and automated systems. The adapter is built specifically for ControlNet networks and uses the coaxial ControlNet physical layer to provide a compact, integrated interface within PowerFlex drive assemblies.