The Allen-Bradley 1756-CN2RXT is a dual-channel ControlNet Redundant Interface Module designed for Rockwell ControlLogix/Logix XT systems, delivering automatic failover between two ControlNet networks. It mounts in a 1756 backplane slot in a ControlLogix chassis and operates at the ControlNet standard 5 Mbps rate, supporting standalone or redundant control configurations. The module supports up to 99 nodes on the ControlNet network and up to 131 total connections (128 standard Logix connections plus 3 reserved for redundancy). Firmware options include revision 25.006, and configuration is performed via USB using RSLinx software.
