Allen-Bradley 1756-EN2TR EtherNet/IP Communication Module

Designed to network Allen‑Bradley ControlLogix PLCs over industrial Ethernet, the 1756‑EN2TR EtherNet/IP communication module delivers high‑speed EtherNet/IP networking with dual RJ‑45 ports supporting 10/100/1000 Mbps and dual‑port redundancy for ring or failover topologies. It provides EtherNet/IP, TCP/IP, and UDP/IP communications, mounts in a 1756 ControlLogix chassis slot, is backplane‑powered, and includes Link, activity, and status LEDs that provide quick status insight during startup and operation to simplify commissioning and fault isolation. This module enables I/O messaging, explicit messaging, and CIP communications to connect PLCs, HMIs, and other networked devices across manufacturing plants, material handling, packaging machinery, and process control installations, delivering reliable real‑time data exchange in industrial Ethernet networks. Commonly used for network integration, distributed system expansion, and replacing legacy interfaces within the Allen‑Bradley ControlLogix ecosystem, it remains compatible with the ControlLogix family and is a standard choice when upgrading or expanding EtherNet/IP connectivity; replacement options include 1756‑EN2T and 1756‑EN4TR.