1757-SRM | Allen-Bradley | ControlLogix & ProcessLogix System Redundancy Module

Product Description

The 1757-SRM System Redundancy Module from Allen-Bradley is designed for ControlLogix and ProcessLogix platforms, providing reliable redundancy management in mission-critical automation systems. This module ensures continuous operation by synchronizing controllers and maintaining system availability during failover events. With fiber-optic connectivity and support for Logix 5560 controllers, the 1757-SRM is engineered for high-performance industrial environments.

Technical Specifications

• Manufacturer: Allen-Bradley

• Part Number: 1757-SRM

• Product Line: ControlLogix / ProcessLogix

• Category: PLCs

• Module Type: System Redundancy Module

• Weight: 1.00 lbs (0.45 kg)

• Backplane Current Draw: 0.160 A @ 24 V DC

• Power Dissipation (Max): 11.28 W

• Thermal Dissipation (Max): 38.49 BTU/hr

• Slot Width: 2 slots

• Connector Type: SC fiber-optic

• Cable Type: 62.5/125-micron multi-mode fiber-optic

• Supported Controllers: Logix 5560 series

• Operating Temperature: 0–60 °C (32–140 °F)

• Storage Temperature: -40–85 °C (-40–185 °F)

• Relative Humidity: 5–95% non-condensing

• Channels: 1 (transmit and receive fiber)

• Wavelength: 1300 nm

• Mounting: ControlLogix chassis

• Enclosure Type: Open-style (no enclosure rating)

• Connector Cable Options:

• 1757-SRC1: 1 m (3.28 ft)

• 1757-SRC3: 3 m (9.84 ft)

• 1757-SRC10: 10 m (32.81 ft)

• 1757-SRC50: 50 m (164.04 ft)

• 1757-SRC100: 100 m (328.08 ft)

Key Features

• Redundancy Management: Ensures seamless failover between controllers

• Fiber-Optic Connectivity: High-speed communication with SC connectors

• Flexible Cabling Options: Multiple cable lengths available for installation needs

• Wide Temperature Range: Operates reliably from 0–60 °C

• Compact Design: Occupies two chassis slots with minimal power consumption

Application Scenarios

• Continuous process industries (oil & gas, chemical, power generation)

• Large-scale manufacturing requiring uninterrupted control

• Safety-critical automation systems with redundancy requirements

FAQ

Q: Which controllers are supported by the 1757-SRM?  A: It is compatible with Logix 5560 controllers.

Q: What type of cable is required for communication?  A: 62.5/125-micron multi-mode fiber-optic cable with SC connectors.

Q: How many slots does the module occupy?  A: The 1757-SRM requires two slots in a ControlLogix chassis.