The Rockwell Automation 20-COMM-H is a versatile RS-485 HVAC-to-DPI Communication Adapter for PowerFlex Architecture Class drives, predominantly used with the PowerFlex 7 drive series. This user-installed module seamlessly integrates with a variety of Allen-Bradley products supporting the Drive Peripheral Interface (DPI), offering compatibility with numerous configuration tools such as the PowerFlex HMI. Key features include configurable I/O logic commands, status indicators for monitoring communication and network connection, and options for selecting from multiple network protocols, including Modbus, Metasys, and Siemens Building Technology.