1757-SRM 2

Overview of Allen-Bradley 1757-SRM-2

The Allen-Bradley 1757-SRM-2 is a System Redundancy Module designed to synchronize a secondary ControlLogix or ProcessLogix controller with a primary controller across two separate chassis. This redundancy module helps ensure continuous system availability by enabling seamless controller switchover in case of primary controller failure.

Key Features

• Provides controller redundancy for high system uptime
• Synchronizes secondary controller to primary controller in real-time
• Supports ProcessLogix and ControlLogix systems
• Operates using multi-mode fiber-optic cable with SC-type connectors
• Single transmit and receive fiber channel, 1300 nm wavelength
• Operating temperature range: 0 to 60 °C (32 to 140 °F)
• Power dissipation: max 11.28 W
• Backplane current: 0.160 A @ 24 V DC
• Open style module, requires two slots in ControlLogix chassis
• Supports cable lengths from 1 m to 100 m with available redundancy cables
• Dimensions: approximately 145 x 70 x 140 mm (5.71 x 2.76 x 5.51 inches)
• Weight approximately 0.45 kg (14.53 oz)

Technical Specifications

Applications

The 1757-SRM-2 is used in highly critical industrial automation systems where downtime is unacceptable, providing seamless failover between redundant controllers to maintain process continuity. It is ideal for applications in process control, manufacturing, and other high-availability environments utilizing ControlLogix or ProcessLogix architectures.