Español 
Suomi 
Description
The Allen-Bradley 1757-SRM is a System Redundancy Module designed to enhance the availability of ProcessLogix and ControlLogix systems by implementing controller redundancy. It ensures continuous synchronization between a primary and a secondary controller, allowing the secondary to seamlessly take over in case of a primary controller failure, thereby minimizing system downtime in critical applications.
Key Features
• Controller Redundancy: Maintains a synchronized secondary controller ready to assume control if the primary fails.
• Fiber-Optic Communication: Utilizes a 62.5/125-micron multi-mode fiber-optic cable with SC connectors to link redundancy modules across chassis.
• Module Indicators: Equipped with status indicators and a four-character display to provide real-time operational status and diagnostics.
• Compatibility: Supports ControlLogix chassis models 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17, with specific slot recommendations for module installation.
Technical Specifications
• Backplane Current:
• 0.75 A @ 3.3V DC
• 1.0 A @ 5.1V DC
• 0.160 A @ 24V DC
• Power Dissipation: 11.28 W maximum
• Thermal Dissipation: 38.49 BTU/hr maximum
• Slot Width: 2 slots
• Operating Temperature: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
• Dimensions (HxWxD): 14.5 x 7 x 14 cm (5.71 x 2.76 x 5.51 inches)
• Weight: Approximately 0.452 kg (14.53 oz)
• Enclosure Type Rating: None (open-style)
• Connector Type: SC type for fiber-optic communication
• Cable Types Supported: 1757-SRC1 (1 m), 1757-SRC3 (3 m), 1757-SRC10 (10 m), 1757-SRC50 (50 m), 1757-SRC100 (100 m)
Applications
• Industrial automation systems requiring high availability and minimal downtime.
• Critical process control environments where seamless controller failover is essential.
• Systems utilizing ControlLogix platforms in need of enhanced redundancy solutions.
Lifecycle Status
The 1757-SRM module was discontinued by the manufacturer on September 30, 2010. For new installations or system upgrades, consider using the 1756-RM or 1756-RM2 modules, which offer enhanced functionality and are part of the current product lineup.
Nordic Trading Partners Oy Ltd specializes in sourcing new, factory-sealed automation components, including those that are discontinued, obsolete, or hard to find. Contact us today to get a quote for the Allen-Bradley 1757-SRM or any other automation component you need. We’ll leverage our expertise and extensive network to find exactly what you’re looking for.
