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Allen-Bradley 20-COMM-C


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All Parts Come with 12 Month Warranty

New, Surplus, and Refurbished Available

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Warranty Information

All products (new, surplus, and refurbished) are covered by Chief Automation's 1 Year Warranty. The Manufacturer's Warranty does NOT apply.

Shipping Information

We offer free standard shipping. Products located in the U.S. are eligible for expedited shipping, including next day air.

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Product Specifications

brand name Allen-Bradley

The Allen-Bradley 20-COMM-C is a PowerFlex ControlNet adapter designed for use with PowerFlex drives, specifically the PowerFlex 750-Series and Digital DC drives. It is a part of the PowerFlex series of drives from Rockwell Automation, a leading manufacturer of industrial automation products.

Technical Specifications

The 20-COMM-C adapter is designed to provide a reliable and efficient communication interface between the PowerFlex drives and other devices on a ControlNet network. Key technical specifications include:

  • Drive Electrical Consumption: 350 mA at 5 VDC supplied by the host (drive or DPI External Comms Kit)
  • RPI (Remote Processing Interval) Rate: 5 ms

Alarm/Error Codes

The user manual for the 20-COMM-C adapter provides detailed information on alarm and error codes that may occur during its operation. These codes are used to diagnose and troubleshoot issues with the adapter and the PowerFlex drives it connects to. For example, the manual includes sections on "6 DPI Fault Object" and "DPI Alarm Object" that describe specific error codes and their meanings.

User Manual

The user manual for the 20-COMM-C adapter is available from Rockwell Automation and provides detailed instructions for the installation, configuration, and maintenance of the adapter. It includes information on technical training, warranty support, and troubleshooting procedures.


Troubleshooting procedures for the 20-COMM-C adapter are outlined in the user manual. These procedures cover common issues such as communication errors, drive faults, and adapter malfunctions. The manual also includes information on how to use diagnostic tools like the Connected Components Workbench software tool to troubleshoot issues.


The 20-COMM-C adapter is designed to work seamlessly with PowerFlex drives and does not require specific programming for its operation. However, the drives themselves may require programming for specific applications, which is typically done using software tools like DriveExplorer and DriveExecutive.


The installation of the 20-COMM-C adapter is a straightforward process that involves connecting it to the PowerFlex drive and configuring the communication settings. The user manual provides detailed instructions for the installation process, including information on the necessary hardware and software requirements.


Rockwell Automation offers comprehensive support services for the 20-COMM-C adapter, including sales and order support, product technical training, warranty support, and support service agreements. The company has a global presence with over 75 sales and support offices, over 500 authorized distributors, and over 250 authorized systems integrators.

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