Allen-Bradley 1756-EN2TR EtherNet/IP Interface Module

The Allen-Bradley 1756-EN2TR EtherNet/IP Interface Module is a dual-port EtherNet/IP bridge for ControlLogix controllers, delivering two copper RJ-45 ports that operate at 10/100 Mbps to connect the ControlLogix backplane to an Ethernet/IP network. With support for up to 128 TCP connections for EtherNet/IP communications, the EN2TR handles multiple sessions between the PLC and network devices. It is designed for redundancy, offering a redundant Ethernet/IP communication path to improve network availability in mission-critical applications. Electrical specifications include a continuous isolation voltage of 30 V and a dielectric withstand rating that has been type tested at 980 V AC for 60 seconds. The module provides USB-to-backplane and USB-to-Ethernet bridging in specific configurations (applies to 1756-EN2T/D, 1756-EN2TR/C, and 1756-EN3TR/B series), supporting on-board configuration and maintenance. Common uses include linking a ControlLogix rack to field devices and automation networks over EtherNet/IP, enabling reliable data exchange for I/O modules, controllers, and remote devices across a plant-wide Ethernet/IP infrastructure.