Allen-Bradley 22-COMM-E PowerFlex EtherNet/IP Communication Adapter

The Allen-Bradley 22-COMM-E, also cataloged as the 22-COMM-E Communication Adapter, operates as a dedicated hardware component for protocol translation and network interfacing between internal drive serial buses and EtherNet/IP networks within industrial control systems. Designed for internal mounting within PowerFlex 4-Class AC drives (PowerFlex 4M, 4, 40, 40P, and 400), the adapter bridges the internal DSI (RS-485) interface to a 10/100 Mbps Ethernet connection operating in full- or half-duplex mode. Signal processing and parameter routing permit operation in both single-drive and multi-drive network configurations.

Hardware Specifications

Deterministic Ethernet Communication & Backplane Routing

The Allen-Bradley 22-COMM-E module integrates with PowerFlex drive control boards to maintain high backplane bus communication velocity across EtherNet/IP deterministic networks. The internal microprocessor handles cyclic I/O messaging, explicit message configuration, and firmware flash compatibility without adding processing overhead to the host drive controller. Built-in packet processing guarantees deterministic data transmission for real-time speed references, drive status feedback, and fault diagnostics across automated control architectures.

Frequently Asked Questions

Q: Does the adapter support multi-drive mode over a single IP address?

A: Yes, in multi-drive mode, the 22-COMM-E acts as a single EtherNet/IP node while routing control commands to up to five PowerFlex 4-Class drives connected via DSI RS-485 daisy-chain networks.

Q: How is the physical network connection established on the module?

A: The board features an onboard RJ45 port that accepts standard Cat5e/Cat6 industrial Ethernet cables supporting 10Base-T and 100Base-TX physical layers.

Field Installation Guidelines

Ensure main line AC power to the host PowerFlex drive is disconnected and verified zero-voltage before removing the drive cover. Insert the 22-COMM-E adapter carefully into the internal option slot, ensuring the multi-pin DSI connector snaps firmly into place. Route the Ethernet cable through the designated low-voltage wiring channel of the drive enclosure, keeping it physically separated from high-voltage 480 VAC input power and motor output wires to mitigate electromagnetic interference. Attach the functional shield drain wire to the drive grounding stud to preserve signal integrity against surge transients.