20-COMM-B

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Overview of Allen Bradley PowerFlex 20-COMM-B

The Allen Bradley PowerFlex 20-COMM-B is a BACnet MS/TP communication adapter designed for integration with PowerFlex 7-Class variable frequency drives. It enables direct BACnet Master-Slave/Token-Passing network connectivity, allowing for control, configuration, and real-time data collection from connected drives. The module installs internally to save panel space, but can also be used externally via a dedicated communications kit. Its rugged design and easy field installation make it a reliable choice for industrial automation applications that require open protocol integration and remote monitoring. The 20-COMM-B supports key drive models including the PowerFlex 70, 700, and 700H series.

Key Features of Allen Bradley PowerFlex 20-COMM-B

  • Internal BACnet MS/TP connectivity for PowerFlex 7-Class drives
  • Field-installable—mounts inside the drive or externally with a DPI External Communications Kit
  • Configurable baud rates: 9600, 19200, 38400, or 76800 bps, with autoband capability out of the box
  • MAC address selection via DIP switches (supports up to node 127)
  • User-configurable termination and bias resistors for network optimization
  • Flash-upgradeable firmware via DriveExplorer, DriveExecutive, or ControlFLASH
  • Multiple configuration tool support, including PowerFlex DPI HIM and drive software
  • Status LEDs for quick diagnosis of network and adapter health
  • Web interface for Series B v3.xxx and above, offering advanced configuration and monitoring

Technical Specs of PowerFlex 20-COMM-B

Spec Value
Compatible Drives PowerFlex 70 (SC/EC), 700 (SC/VC), 700H
Network Protocol BACnet MS/TP
Baud Rates 9600, 19200, 38400, 76800 bps
MAC Address Range 0–127
Mounting Internal (drive-mounted) or external (with kit)
Status Indicators Network, DPI, adapter LEDs
Configuration HIM, DriveExplorer, DriveExecutive, ControlFLASH
Termination/Bias Switchable on-board

Applications / Use Case

The Allen Bradley PowerFlex 20-COMM-B is used for integrating variable frequency drives into BACnet MS/TP-based building automation and industrial control systems. It is ideal for commercial and industrial facilities requiring seamless integration with HVAC, pumping, fan, and other motor control applications. The adapter’s open protocol support allows for interoperability with third-party building management systems, simplifying system architecture and reducing wiring complexity. Its web configuration features (on select firmware) further streamline remote setup and diagnostics, making it suitable for both new installations and upgrades.

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20-COMM-B

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Does it come with a warranty?

Yes, All products are offered wth 1-Year warranty.

What is the condition of the product?

All products sold are New & Unused.

How fast is shipping?

All products are delivered within 2-8 business days depending on our stock location.

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