Allen-Bradley 1756-ENBT EtherNet IP Interface Module

The Allen-Bradley 1756-ENBT EtherNet/IP Interface Module (FW 6.004) provides a dedicated EtherNet/IP interface for ControlLogix systems, bridging a backplane to a 10/100 Mbps Ethernet network with a single copper RJ45 port. It operates as either an interface for a ControlLogix controller to communicate with devices on EtherNet/IP or as an adapter for 1756 I/O modules on an EtherNet/IP network, delivering reliable data exchange across CIP and TCP connections. The module supports up to 128 CIP connections and up to 64 TCP connections, enabling multiple data paths, and it draws 700 mA at 5.1 V (3 mA at 24 V) with a power dissipation around 3.7 W; isolation between Ethernet and backplane is rated at 30 V continuous. Mounting is chassis-based in any slot of a 1756 backplane, and hot-swapping is supported per Allen‑Bradley guidelines, allowing field replacements without a full chassis power-down. With its 10/100 Mbps Ethernet interface and compatibility with ControlLogix networks, the ENBT is suited for industrial Ethernet applications that require straightforward, reliable network integration for process and discrete automation, remote I/O, and data collection across an EtherNet/IP infrastructure.