The Allen-Bradley 1756-RM is an enhanced redundancy module from the ControlLogix family, designed for use within the Programmable Automation Controller (PAC) platform. This module enables controller redundancy, ensuring continuous operation and system availability in critical automation environments. It features one (1) LC fiber optic single-mode connector for high-speed communication between paired modules. The 1756-RM also includes module status indicators such as PRI, COM, and OK LEDs, which display the redundancy state and operational health of the system, providing clear diagnostics for maintenance and monitoring.