Product Details
Overview
The Allen-Bradley 1757-SRM is a high-reliability System Redundancy Module for ControlLogix and ProcessLogix environments. It enables fault-tolerant operation by allowing redundant controller configurations, ensuring continuous system availability and minimizing downtime in critical automation applications.
Technical Specifications
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Manufacturer: Allen-Bradley
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Model & Part Number: 1757-SRM
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Category: PLCs
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Product Line: ControlLogix
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Module Type: System Redundancy Module
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Weight: 1.00 lbs (0.45 kg)
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Backplane Current: 0.160 A at 24V DC
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Supported Controllers: Logix 5560
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Maximum Power Dissipation: 11.28 W
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Maximum Thermal Dissipation: 38.49 BTU/hr
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Slot Width: 2
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Operating Temperature: 0–60°C (32–140°F)
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Enclosure Type: Open-style (no rating)
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Connector: SC fiber-optic type
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Cable Compatibility: 62.5/125 μm multi-mode fiber-optic
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Wavelength: 1300 nm
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Fiber Channels: 1 transmit and 1 receive
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Connector Cable Options: 1757-SRC1 (1 m), 1757-SRC3 (3 m), 1757-SRC10 (10 m), 1757-SRC50 (50 m), 1757-SRC100 (100 m)
Applications
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High-availability PLC systems requiring redundant controllers
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Critical process control in manufacturing plants and utility operations
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Systems requiring uninterrupted communication between redundant modules
FAQ
Q: Which controllers are compatible with the 1757-SRM?
A: The 1757-SRM supports Logix 5560 controllers in ControlLogix and ProcessLogix setups.
Q: What fiber-optic cables are recommended for the module?
A: Allen-Bradley fiber-optic cables such as 1757-SRC1, SRC3, SRC10, SRC50, and SRC100 are compatible.
Q: Can this module operate in harsh industrial environments?
A: The module operates within 0–60°C (32–140°F) and is suitable for standard control cabinet installations; however, it does not have a sealed enclosure rating.
Q: How many channels does the module have?
A: It provides a single channel for transmit and receive fiber communication.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Why Programmable Logic Controllers Drop into Stop Mode: An Expert Analysis
Industrial automation systems rely heavily on Programmable Logic Controllers (PLCs) to maintain uninterrupted production. When a PLC unexpectedly shifts from Run to Stop mode, whole manufacturing lines stall.
As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.
Human-Machine Interface Design: Essential Guide to HMI Selection, Visualization, and Control System Integration
Human-Machine Interfaces (HMIs) serve as the primary operational window into complex industrial automation systems. Modern HMIs convert raw machine data into clear graphical displays, enabling operators to oversee entire manufacturing processes in real time. Instead of relying on physical control panels full of hardwired switches, engineers program interactive screens using intuitive graphics, dynamic color coding, and responsive touch interfaces. Over my 15 years in control systems engineering, I have observed HMIs transform from basic display screens into sophisticated command centers that drive operational efficiency across DCS and PLC environments.