Configured for high-availability synchronization across industrial control architectures, the Allen-Bradley 1757-SRM, also cataloged as the 1757SRM System Redundancy Module, executes direct physical and electrical handshaking between paired controller nodes.

Part Number Breakdown & Model Matrix

• Catalog Number: 1757-SRM
• Spare Designator: 1757SRM
• Platform Architecture: ControlLogix / ProcessLogix
• Supported Processors: Logix 5560 series

Hardware Specifications

Network Communication & Architecture Scaling

The redundancy module controls deterministic network operations through backplane bus communication velocity licenses and supports Profinet or EtherNet/IP deterministic networks. I/O density scaling allows synchronized data mapping across dual chassis configurations, while firmware flash compatibility ensures unified version control during runtime updates.

Order Deliverables & Package Contents

• 1 x Allen-Bradley 1757-SRM System Redundancy Module hardware unit
• 1 x SC-type fiber-optic port dust cover set
• 1 x Technical documentation and regulatory compliance insert

Physical Installation & Slot Allocation Guidelines

• Chassis Mounting: Install the module directly into a designated slot within an open-style ControlLogix chassis, ensuring firm engagement with backplane pins.
• Fiber-Optic Cabling: Connect matching SC-type fiber-optic cables between redundant modules while maintaining the manufacturer's minimum bend radius limits.
• Terminal Wiring: Terminate external auxiliary power and relay status lines securely to the removable terminal block using proper torque limits.

Frequently Asked Questions

• What primary controller series are supported by the 1757-SRM module?

  The hardware is engineered specifically to support Logix 5560 controller platforms in dual-redundant configurations.

• What is the maximum power dissipation rating during active operation?

  The module exhibits a maximum power dissipation of 11.28 W, generating up to 38.49 BTU/hr of thermal energy.

• What are the specific backplane current requirements across voltage rails?

  It draws 0.75 A at 3.3 VDC, 1.0 A at 5.1 VDC, and 0.160 A at 24 VDC from the chassis backplane.

• What type of optical connector is integrated into the front faceplate?

  The module features an SC-type fiber-optic connector interface for high-speed inter-rack data exchange.

• What are the electrical ratings for the onboard relay terminals?

  The relay output terminals are rated for 30 VDC Class 2 or SELV operation with a maximum current capacity of 100 mA.

• Does the module require an auxiliary power supply connection?

  Yes, it accepts external power requirements ranging from 11 to 30 VDC, drawing approximately 270 mA at 24 VDC typically.

• What is the physical net weight of the redundancy module?

  The unit has an individual net weight of 0.45 kg, which is approximately 14.53 oz.

• What enclosure rating category applies to this hardware?

  The module features an open-style enclosure type rating with no direct independent environmental sealing.