Allen Bradley 20-COMM-H PowerFlex 7-Class HVAC Communication Adapter

Product Overview

The Allen Bradley 20-COMM-H acts as a high-performance communication gateway specifically engineered for PowerFlex 7-Class AC drives, including the PowerFlex 70. It bridges the gap between industrial motor control and building automation systems (BAS). By supporting specialized HVAC protocols like Metasys N2 and Siemens P1 alongside standard Modbus RTU, this adapter allows facility engineers to integrate heavy-duty drives into sophisticated climate control and building management networks. We supply this unit as 100% Brand New and factory-original, ensuring seamless protocol conversion and high-speed data exchange via the drive's internal Deep Packet Inspection (DPI) interface.

Technical Specifications

The 20-COMM-H utilizes the drive's internal power and mounting infrastructure to provide a reliable network node.

Engineering Advantages

• Multi-Protocol Versatility: This single adapter supports three distinct HVAC-centric protocols. This flexibility allows contractors to standardize on PowerFlex drives while maintaining compatibility with diverse building automation front-ends like Johnson Controls (Metasys) or Siemens Apogee.

• Direct DPI Integration: The module interfaces directly with the drive via the DPI protocol. This high-speed connection provides the BAS with deep visibility into drive parameters, including real-time current draw, torque, and fault diagnostics, far exceeding the data available via simple analog I/O.

• Secure Hardware Installation: The unit features captive mounting screws. This design prevents hardware loss during installation in cramped cabinets and ensures a vibration-resistant mechanical bond with the drive's control pod, maintaining electrical contact integrity in high-vibration industrial settings.

• Low Power Footprint: Drawing only 150 mA from the drive's internal 5V DC supply, the adapter adds negligible thermal load to the drive's control circuitry. This efficiency ensures the primary drive components operate within their intended thermal margins.

• Simplified Commissioning: The adapter supports a wide range of baud rates (up to 38,400 bps for Modbus RTU). This allows engineers to match existing network speeds without forcing a total system reconfiguration or installing additional repeaters.

FAQs

• Does this 20-COMM-H unit come in original packaging?

  Yes. We supply only 100% Brand New units in original Allen Bradley factory boxes. Every module includes the factory-set UPC (820919000256).

• Which protocols can I use with this adapter?

  The 20-COMM-H specifically supports Modbus RTU, Metasys N2, and Siemens Building Technologies (P1). You select the active protocol via the drive's internal parameters or physical switches on the module.

• Can I mount this adapter on any PowerFlex drive?

  This adapter specifically fits PowerFlex 7-Class drives, such as the PowerFlex 70. It requires a Frame Size A or compatible control architecture. It is not compatible with PowerFlex 4-Class or PowerFlex 525 drives.

• Do I need an external power supply for this module?

  No. The 20-COMM-H draws all necessary operating power directly from the drive's internal DPI port. Simply secure the captive screws to complete both the mechanical and electrical connection.