Allen-Bradley 1757-SRM System Redundancy Module

The Allen-Bradley 1757-SRM System Redundancy Module is designed to enhance the reliability and availability of ControlLogix systems by providing redundancy for critical components. This module facilitates seamless switching between primary and redundant controllers, ensuring continuous operation in the event of a failure. With robust diagnostics and monitoring capabilities, the 1757-SRM is essential for mission-critical applications where downtime must be minimized.

Advantages:

• Enhances system reliability with redundant controllers
• Seamless automatic failover to ensure continuous operation
• Comprehensive diagnostics for monitoring system health
• Ideal for industrial applications requiring high availability

General Info

• Manufacturer: Allen-Bradley
• Model Number: 1757-SRM
• Type: System Redundancy Module
• Compatibility: ControlLogix systems
• Operating Temperature Range: 0°C to 60°C

Features

• Redundant Controller Support: The 1757-SRM module allows for the configuration of redundant controllers, ensuring that if one controller fails, the system automatically switches to the backup without any interruption in operation. This feature is crucial for maintaining uptime in critical applications.

• Automatic Failover: In the event of a primary controller failure, the redundancy module facilitates a seamless switch to the redundant controller. This failover process is quick and efficient, minimizing system downtime and maintaining continuous operation.

• Comprehensive Diagnostics: The module provides extensive diagnostic capabilities, including LED status indicators and built-in diagnostics for monitoring the health of both the primary and redundant controllers. This allows for proactive maintenance and quick identification of issues.

• Hot-Swap Capability: The 1757-SRM supports hot-swapping, allowing users to replace or upgrade the module without shutting down the system. This feature is essential for maintenance operations, ensuring minimal disruption to ongoing processes.

• Flexible Configuration: The module can be easily configured to meet specific application needs, allowing users to tailor the redundancy setup according to their operational requirements.

Technical Specifications

• Electrical Specifications:

  • Input Voltage: 24 VDC
  • Power Consumption: 5 W
  • Isolation Voltage: 1500 VDC (input to output)

• Mechanical Specifications:

  • Dimensions: 142 mm (H) x 35 mm (W) x 145 mm (D)
  • Weight: 0.5 kg
  • Mounting Method: Installed in a ControlLogix chassis

• Environmental Specifications:

  • Operating Temperature Range: 0°C to 60°C
  • Storage Temperature Range: -40°C to 85°C
  • Relative Humidity: 5% to 95% (non-condensing)
  • Shock:
    • Operating: 30 g peak for 11 ms
    • Non-operating: 50 g peak for 11 ms
  • Vibration:
    • Operating: 10 to 500 Hz, 2 g peak
    • Non-operating: 10 to 500 Hz, 5 g peak

• Compliance and Certifications:

  • Safety Standards: UL Listed, CE Marked
  • Hazardous Location Ratings: Class I, Division 2, Groups A, B, C, D
  • EMC Compliance: EN 61000-6-2 and EN 61000-6-4

• Performance Specifications:

  • Response Time:
    • Failover Time: Typically ≤ 50 ms
    • Diagnostic Response Time: 10 ms
  • Communication Rate: Supports communication rates of up to 1 Mbps

• Input/Output Specifications:

  • Controller Status Indicators:
    • LED indicators for primary and secondary controller status (OK, Fault, Active)
  • Connection Type:
    • Removable terminal blocks for input/output connections
    • EtherNet/IP or ControlNet communication

• Protection Features:

  • Overvoltage Protection:
    • Input overvoltage protection of up to 30 VDC
  • Overtemperature Protection:
    • Integrated thermal monitoring to prevent overheating
  • Short Circuit Protection: Automatic recovery after a short circuit condition is cleared

• Physical Specifications:

  • Housing Material: Industrial-grade plastic with a robust design
  • Protection Rating: IP20 (not water resistant)

• System Compatibility:

  • Supported ControlLogix Firmware: Compatible with firmware version 20.0 or higher
  • Integration with Other Modules: Can be integrated with other ControlLogix I/O modules for expanded functionality

• Environmental Conditions:

  • Altitude: Up to 2000 meters (6562 feet) above sea level without derating
  • Pollution Degree: 2 (according to IEC 60664-1)

• Compliance and Certifications:

  • Environmental Compliance: RoHS Compliant
  • Industry Standards:
    • EN 61131-2 for programmable controllers
    • EN 61010-1 for safety requirements