Allen-Bradley 1756-SRM ControlLogix System Redundancy Module

Product Overview

The Allen-Bradley 1756-SRM module provides advanced system redundancy for ControlLogix controllers. It synchronizes a primary and secondary chassis via high-speed fiber optics, ensuring uninterrupted operation during controller failures. This module enhances industrial process reliability by enabling seamless failover between controllers.

Each module occupies two slots per chassis and communicates through a fiber-optic SC port supporting 62.5/125 µm multimode fiber. The integrated status LEDs display primary activity, communication integrity, and health status, simplifying monitoring and diagnostics.

Designed for industrial environments, the 1756-SRM operates in temperatures ranging from 0 to 60 °C and supports non-condensing humidity from 5% to 95%. Its open-style enclosure and UL, CE, and Class I Div 2 certifications ensure safe and reliable performance in critical applications.

Technical Specifications

Features & Advantages

• Provides controller-level redundancy for critical industrial processes.

• Seamless failover from primary to secondary chassis without process interruption.

• Fiber-optic communication ensures high-speed, reliable synchronization.

• Compact design fits into existing ControlLogix chassis with minimal modifications.

• Status LEDs allow real-time monitoring of primary, communication, and health conditions.

Installation Guidelines

• Requires two identical ControlLogix chassis with matching modules and firmware.

• Install one 1756-SRM module in each chassis.

• Connect modules via multimode fiber-optic cable with SC connectors.

• Ensure proper grounding and shielding for EMC compliance.

• Use Studio 5000 or RSLogix 5000 for redundancy configuration.

• Perform system qualification after installation to validate synchronization.

FAQ

Q1: Is the 1756-SRM original Allen-Bradley?
A1: Yes, the 1756-SRM is fully original and factory new.

Q2: How many slots does it occupy?
A2: The module occupies 2 slots in each ControlLogix chassis.

Q3: What communication interface does it use?
A3: It uses a fiber-optic SC connector supporting 62.5/125 µm multimode fiber.

Q4: What is the operating temperature range?
A4: The 1756-SRM functions reliably between 0 to 60 °C.

Q5: How is redundancy configured?
A5: Redundancy is set up using Studio 5000 or RSLogix 5000 software.

Q6: When will it ship?
A6: We have stock, and shipping occurs within 3–14 days depending on order size and logistics.