The Allen-Bradley 1756-RM2/A is a ControlLogix Redundancy Module designed to improve system reliability and uptime. By pairing two modules in separate ControlLogix chassis, you create a redundant system. The system automatically switches to the backup controller if the primary controller fails. This ensures continuous operation and minimizes downtime.

Key Features and Benefits

• Enhanced Redundancy: Synchronizes two controllers and switches automatically to the backup during a failure.
• High-Speed Communication: Supports up to 1000 Mbps, ensuring fast and efficient data transfer between controllers.
• Minimal Scan Time Delay: Provides a typical scan time delay of around 20ms during a switchover, reducing process disruption.
• Cross Loading: Transfers data seamlessly between controllers through redundant fiber ports.
• Enhanced Diagnostics: Offers advanced diagnostics to help identify and resolve potential issues efficiently.

Technical Specifications

• Model Number: 1756-RM2/A
• Type: ControlLogix Redundancy Module
• Communication: Redundant fiber ports
• Speed: Up to 1000 Mbps
• Power Requirements: 1.16 A at 5.1V DC, 3.4 mA at 24V DC
• Compatibility: Requires two compatible ControlLogix chassis for redundancy

Applications

The 1756-RM2/A is ideal for applications where system uptime is critical, including:

• Process Control: Ensures continuous operation of essential industrial processes.
• Machine Automation: Prevents production downtime from controller failures.
• Safety Systems: Delivers high reliability for safety-critical operations.