Allen-Bradley 1756-EN2T Ethernet Interface Module

Allen-Bradley 1756-EN2T is a two-port ControlLogix EtherNet/IP communication module that provides the primary Ethernet interface between a 1756 backplane and plant networks. It delivers 10/100 Mbps Ethernet over copper RJ45 connections, enabling simultaneous device-to-network traffic and backplane communications. The module supports up to 128 TCP connections and 256 CIP connections, supporting multiple concurrent EtherNet/IP sessions for I/O messaging and explicit/implicit communications. Installed in a ControlLogix rack, it offers Ethernet-to-backplane isolation rated at 30 V (continuous). Firmware revision D, version 11.002 is the known release for this model, with documentation noting compatibility with standard Ethernet topologies and redundancy configurations in ControlLogix deployments. Typical applications include connecting HMIs, SCADA, and other controllers to a ControlLogix network or linking multiple ControlLogix racks for distributed automation in manufacturing environments.