Allen-Bradley 1756-EN4TRK EtherNet IP Interface Module

The Allen-Bradley 1756-EN4TRK EtherNet/IP Interface Module is a dual-port Ethernet/IP communications module for Rockwell Automation ControlLogix controllers, providing a native link between the ControlLogix backplane and external EtherNet/IP devices. It features two RJ45 copper ports that support 10 Mbps, 100 Mbps, and 1 Gbps twisted-pair networks, enabling flexible integration with plant networks and automation devices. The module supports up to 512 TCP connections and up to 256 axes, and the conformally coated variant (suffix K) is designed for harsher industrial environments. Typical uses include bridging EtherNet/IP links to route messages to devices on other networks, enabling messaging and data exchange with HMIs, drives, and remote I/O while remaining fully compatible with the ControlLogix backplane. As part of the 1756 EtherNet/IP Interface family, the EN4TRK serves in ControlLogix systems that require multi-endpoint Ethernet/IP connectivity.