Allen-Bradley 1756-EN3TR B EtherNet IP Bridge Module

The Allen-Bradley 1756-EN3TR/B ControlLogix EtherNet/IP Bridge Module is a two‑port copper Ethernet/IP bridge designed for seamless integration within a ControlLogix backplane. It provides two 10/100 Mbps RJ‑45 ports with embedded switch technology, enabling straightforward bridging and network segmentation across EtherNet/IP networks in industrial automation setups. This Series B revision is described as a redundant Ethernet/IP communication module, built to support high‑availability network topologies while handling typical ControlLogix communications. Key capabilities include support for up to 128 TCP connections and up to 128 CIP Motion axes, with as many as 256 Logix connections, making it suitable for CIP motion applications and complex network architectures. The EN3TR/B serves as a dedicated bridge module that maintains standard Ethernet/IP communication within a 1756 chassis, enabling reliable data exchange between remote racks or subnets while preserving throughput and protocol integrity in demanding environments.