The 1757-SRM is an important module of the Allen-Bradley ProcessLogix and ControlLogix systems, which are used for redundant configuration of controllers to improve the availability and reliability of the entire industrial control system. This module operates synchronously by installing the primary and secondary controllers in two different ControlLogix cases, ensuring that the secondary controller can seamlessly take over control tasks in the event of a primary controller failure, ensuring continuity in the production process.

The 1757-SRM module has the following features:
Two-slot module designed for installation in the ControlLogix chassis.
With an integrated fiber port, the 62.5/125 micron multimode fiber cable is connected to the 1757-SRM module in another chassis to form a synchronous link.
The module status display function provides real-time information about the operating status of the module through different LED indicators, including the main box indicator (PRI LED), communication and synchronization status (COM LED), and health status (health LED).
The module is compatible with a variety of ControlLogix chassis and system power supplies, including but not limited to the 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 chassis. And 1756-PA72, 1756-PA75, 1756-PB72, and 1756-PB75 system power supplies. During installation, ensure that the dimensions, module installation and location, and system power supply and module version of the two chassis are consistent.

The 1757-SRM module is designed to meet the needs of critical industrial applications that need to remain operational in all circumstances, ensuring continuity and safety of production through redundant systems.