Allen-Bradley 20-COMM-M Communication Adapter

The Allen-Bradley 20-COMM-M is a PowerFlex Modbus/TCP DPI adapter that enables Modbus TCP communication with PowerFlex drives through the Drive Peripheral Interface (DPI). As a DPI external communications kit, the adapter occupies the drive’s DPI port and requires a Comm Carrier Card for installation, providing a straightforward path to add Modbus/TCP connectivity to a PowerFlex system. It supports the Modbus/TCP protocol and facilitates access to the PowerFlex drive and its peripherals over a Modbus TCP network, which is commonly used to integrate PowerFlex equipment with PLCs and SCADA systems for control and monitoring. In Rockwell Automation’s product catalog it is listed as the 20-COMM-M Modbus/TCP Adapter within the PowerFlex Architecture class DPI Modbus/TCP Adapter; Rockwell shows Mexico as its country of origin and notes a standard one-year warranty. Typical applications include feeding drive status, setpoints, and fault data to a PLC or SCADA system, while allowing commands from the control system to be sent to the PowerFlex drive, all via Modbus/TCP. Because it is part of the PowerFlex DPI family, it complements other DPI adapters and enables scalable integration in automation architectures that rely on Rockwell Automation hardware and standards.