Allen-Bradley 1756-CNB ControlNet Communication Bridge

The Allen-Bradley 1756-CNB Rev L01 ControlNet Communication Bridge is a ControlLogix bridge module that links a ControlLogix backplane to a ControlNet network, enabling data exchange between the local rack and remote ControlNet I/O devices. It provides a dedicated ControlNet interface for bridging communications between the ControlLogix chassis and ControlNet nodes, supporting produced/consumed data and both scheduled and unscheduled messages to remote devices. Installed in a 1756 ControlLogix chassis, this module allows seamless bridging of ControlNet I/O racks and peripherals to the main controller, supporting deterministic exchanges essential for time-critical processes. The Rev L01 variant and its included cable reflect the specific configuration provided with this package, making it suitable for integrating legacy ControlNet devices with modern ControlLogix systems. Common applications include expanding ControlNet I/O across multiple racks, connecting remote ControlNet devices to a ControlLogix controller for centralized supervision, and enabling data produced/consumed synchronization across networks while preserving ControlNet's timing characteristics.