Allen-Bradley 1756-ENBT Ethernet/IP Communications Bridge Module

The Allen-Bradley 1756-ENBT Ethernet/IP Bridge Module is a copper Ethernet/IP interface for Rockwell ControlLogix systems, serving as the bridge between a 1756 backplane controller and external Ethernet/IP networks. It provides 10/100 Mbps Ethernet support for CIP communications, enabling reliable data exchange between controllers, I/O, HMIs, drives, and other networked equipment. The module supports up to 64 TCP connections and up to 128 CIP connections, allowing concurrent I/O messaging, explicit messaging, and routine control traffic across Ethernet/IP. Typical applications include linking a ControlLogix controller to remote I/O or devices on an Ethernet/IP network, integrating legacy networks with EtherNet/IP, and enabling high-throughput data transfers for HMI and engineering tasks. Installed in a 1756 backplane slot, the 1756-ENBT is part of Allen-Bradley’s Ethernet/IP family of 1756 communication modules.