Allen-Bradley 1756-RM2 | ControlLogix Redundancy Module – Single Channel Fiber, SIL2 Certified

Overview

The Allen-Bradley 1756-RM2 is a redundancy communication module for ControlLogix systems, supporting SIL2-rated safety applications and enabling high-speed synchronization between redundant controllers. It features a single-channel fiber optic interface with 1 transmit and 1 receive port, supporting distances up to 10 km and speeds up to 1000 Mbps.

Ideal for high-availability systems, the 1756-RM2 is critical for applications requiring controller redundancy, fast failover, and fault-tolerant design in process, energy, and infrastructure automation.

Key Features

• Function: Redundancy synchronization module

• Communication Type: Single-channel fiber (1 TX / 1 RX)

• Max Distance: Up to 10 km

• Max Speed: Up to 1000 Mbps

• Safety Certification: SIL2 (Safety Integrity Level 2)

• Compatibility: ControlLogix redundancy systems

• High-Speed Sync – Minimizes switchover time

• Diagnostic LEDs – Clear status and fault indication

Technical Specifications

• Model: 1756-RM2

• Fiber Ports: 1 transmit / 1 receive (LC connectors)

• Data Rate: Up to 1 Gbps

• Fiber Type: Single-mode (for 10 km range)

• Safety Rating: SIL2, per IEC 61508

• Mounting: ControlLogix chassis

• Operating Temp: 0°C to +60°C

• Backplane Current (5.1V): ~1.2 A

• Certifications: UL, CE, c-UL, SIL2

Applications

• Redundant Control Systems – Zero downtime operations

• SIL2 Safety Applications – In process automation and infrastructure

• Energy & Utilities – Power generation, water treatment, oil & gas

• Mission-Critical Automation – High-availability system architectures

Why Choose the 1756-RM2?

• Supports fiber redundancy up to 10 km

• Enables high-speed controller synchronization

• Certified for SIL2 functional safety applications

Order Now

In stock and ships worldwide. Ask about redundancy controller kits, fiber cables, or ControlLogix SIL2-certified configurations.