Allen-Bradley 1756-CNB ControlLogix ControlNet Bridge Module links to route messages to devices on other networks, monitors & control I/O modules located remotely from the ControlLogix controller. 1756-CNB provides adapter functionality for remote ControlLogix I/O modules, messaging data for configuration & programming info, operator interfaces, upload/download. 1756CNB supports I/O bridge functionality, transfer of scheduled data via produced/consumed tags, unscheduled MSG instruction communication with other ControlNet nodes, local network access via NAP.