The Allen-Bradley 1756-CN2R is a ControlLogix ControlNet Redundant Bridge Module designed to provide a highly reliable communication link between a ControlLogix chassis and a ControlNet network. By supporting redundant media paths (Channel A and Channel B), this module ensures continuous network operation even if one of the cables fails, making it ideal for critical control applications where system uptime is paramount. It facilitates high-speed data exchange at 5 Mbps and can connect up to 99 nodes on the network. The 1756-CN2R is easily installed in any slot of a 1756 ControlLogix chassis, offering a robust solution for fault-tolerant industrial automation systems.