Allen-Bradley 1756-ENBT A Ethernet Interface Module

The Allen-Bradley 1756-ENBT A is a ControlLogix EtherNet/IP bridge module that delivers reliable 10/100 Mbps copper Ethernet connectivity between a Rockwell Automation ControlLogix controller and EtherNet/IP networks. Operating as part of the 1756 backplane, it enables Ethernet/IP communications for I/O data and information messages across the plant floor. Key specifications include an EtherNet/IP communication module that uses twisted-pair copper Ethernet at 10/100 Mbps, with support for up to 64 TCP connections and 128 CIP connections (combining implicit and explicit messaging). This Series A revision is designed to function as a front-end interface between the ControlLogix controller and external Ethernet/IP devices. Typical applications involve linking a ControlLogix system to EtherNet/IP devices such as HMIs, SCADA systems, variable frequency drives, and other PLCs, enabling data exchange and remote I/O access across interconnected racks and networks. In normal operation, the ENBT A serves as the gateway for industrial Ethernet communications within a ControlLogix architecture, providing a stable, standards-based bridge between the controller and the broader Ethernet/IP network.