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  • 1757-SRC1 Allen Bradley redundancy module cable
  • 1757-SRC1 Allen Bradley redundancy module cable
  • 1757-SRC1 Allen Bradley redundancy module cable
  • 1757-SRC1 Allen Bradley redundancy module cable
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1757-SRC1 Allen Bradley redundancy module cable

  • Allen Bradley
  • USA
  • 2024
  • In Stock
The Allen-Bradley 1757-SRC1 is a 1-meter (3.28 ft) fiber-optic redundancy module cable manufactured by Rockwell Automation. 1757-SRC1 Allen Bradley is designed specifically to connect two 1757-SRM (System Redundancy Modules) in Rockwell Automation ControlLogix systems, enabling high-speed synchronization between a primary and a secondary controller chassis.
Annex

1757-SRC1 Allen Bradley Technical Data

Cable Length: 1 meter (3.28 ft).

Connector Type: ST-type (fiber-optic).

Connector Alignment: Keyed for error-free installation.

Cable Type: 62.5/125 micron multi-mode fiber-optic cable.

Channels: One channel (consisting of both transmit and receive fibers).

Ground Isolation: Not applicable (N/A) due to the fiber-optic interface.

Application: Designed exclusively for communication between 1757-SRM modules.

Allen Bradley redundancy module cable Images


1757-SRC1 Allen Bradley

Allen Bradley redundancy module cable

1757-SRC1

Allen Bradley redundancy module cable

Allen Bradley redundancy module cable

Allen Bradley redundancy module cable

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Allen Bradley redundancy module cable FAQ

Q1: What is the Allen-Bradley 1757-SRC1, and what is its primary function?
A1: The Allen Bradley 1757-SRC1 is a 1-meter (3.28 ft) factory-terminated fiber-optic link built specifically for Rockwell Automation’s legacy ControlLogix platforms. In high-availability setups, you use the 1757-SRC1 to bridge two 1757-SRM modules together. This connection establishes a high-speed synchronization pathway between your primary and secondary controller chassis. Because data moves instantly across the 1757-SRC1, the backup chassis can take over control smoothly without causing a bump in your plant operations if the main controller drops offline.
Q2: What are the physical fiber and connector specifications of the 1757-SRC1?
A2: Under the hood, the Allen Bradley 1757-SRC1 runs on a 62.5/125 micron multi-mode fiber-optic core operating at a 1300 nm wavelength. Both ends of the 1757-SRC1 are terminated with rugged, industrial-grade ST-type connectors. To prevent costly mistakes during field maintenance, Rockwell built a physical keyway alignment mechanism right into the 1757-SRC1 housing. This mechanical "foolproof" design ensures field technicians cannot mix up the transmit/receive orientation or mess up the polarity during hot-swaps.
Q3: What critical precautions must be taken when installing the 1757-SRC1 Allen Bradley in the field?
A3: Handling the Allen Bradley 1757-SRC1 requires strict adherence to fiber-optic installation best practices to avoid signal degradation:

  1. Bend Radius Restrictions: Never pull or force the 1757-SRC1 Allen Bradley into a sharp bend. Bending it past its limit creates micro-fractures in the glass core, leading to high signal loss or physical breaks.

  2. Mechanical Protection: Route the Allen Bradley 1757-SRC1 deeply inside protective wireways or conduits. Keep it far away from sharp enclosure edges, heavy foot traffic, or crushing hazards.

  3. Contamination Control: Leave the black dust caps on the 1757-SRC1 Allen Bradley until the exact moment of connection. Even tiny dust particles on the fiber end-face will block light and cause communication dropouts.

Q4: Can the Redundancy module cable be used with newer 1756-RM or 1756-RM2 redundancy modules?
A4: No, you cannot use the 1757-SRC1 Allen Bradley with modern ControlLogix hardware. The legacy 1757-SRC1 Allen Bradley relies on older ST-type twist-on connectors. In contrast, modern 1756-RM and 1756-RM2 modules feature updated Small Form-factor Pluggable (SFP) transceivers that require dual LC-type click-in connectors. If you are upgrading your system away from modules that need the 1757-SRC1 Allen Bradley, you will have to swap the cable out for a modern 1756-RMC1 (1-meter) or 1756-RMC3 (3-meter) equivalent.
Q5: What is the product lifecycle status of the 1757-SRC1, and how can replacement units be procured?
A5: Rockwell Automation has officially retired the Allen Bradley 1757-SRC1, meaning factory production has stopped completely. To keep your legacy lines running and prevent expensive downtime, you can buy reliable, fully tested Allen Bradley 1757-SRC1 spares directly from our Spare Center. We keep a steady inventory of the Allen Bradley 1757-SRC1 on our shelves—offering certified refurbished units and New Open Box options—all backed by our comprehensive warranty so your team can restore operations immediately.

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1757-SRC1 Allen Bradley


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