OVERVIEW

Official designation: Allen-Bradley 20-COMM-R (PowerFlex, Remote I/O Communication Adapter)

Role/Application: Adapter providing Remote I/O (RIO) protocol connectivity for PowerFlex 70 and 700 drives, enabling three selectable data rates for industrial control systems.

KEY SPECS SUMMARY

Power: 250 mA at 5V DC from host drive

Interfaces / Ports: One RIO / DH+ 3-wire Terminal strip

Indicators: Three LEDs for DPI, Adapter, and Network

Operating Temp: Minus 10 degrees C to 50 degrees C

Platform / Compatibility: PowerFlex 70 and 700 series drives

Limit: 5 percent to 95 percent relative humidity non-condensing

Lifecycle: Discontinued May 1, 2016.

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What are the three selectable data communication rates supported by the 20-COMM-R adapter?

A: The adapter supports selectable rates of 57.6 Kbps, 115.2 Kbps, and 230.4 Kbps.

Wiring & Installation:

Q: What type of cable is recommended for connecting the Remote I/O network to the adapter?

A: Remote I/O protocol commonly uses Belden 9463 communication cable in a daisy-chain topology.

Troubleshooting & Compatibility:

Q: Can the 20-COMM-R adapter be used with PowerFlex 750 Series drives?

A: This adapter is listed as not compatible with PowerFlex 750-Series drives in migration guides.

Replacement & Upgrades:

Q: Which legacy controllers is the Remote I/O protocol compatible with for communication?

A: The RIO protocol is compatible with older Allen-Bradley controllers like the PLC-5 and SLC 500 systems.