Allen-Bradley 1756-RMC3 ControlLogix 3-Meter Redundancy Module Fiber Optic Cable

Product Overview

The Allen-Bradley 1756-RMC3 functions as the critical high-speed data link for ControlLogix redundancy systems. This 3-meter (9.84 feet) fiber optic cable connects two 1756-RM or 1756-RM2 redundancy modules, enabling real-time state synchronization between primary and secondary controller chassis. It facilitates the "bumpless" switchover required for mission-critical processes where even milliseconds of downtime result in catastrophic production loss. We supply this cable in 100% Brand New and Original condition, ensuring maximum light transmission efficiency and signal integrity for your redundant architecture.

Technical Specifications

Engineering Advantages

The 1756-RMC3 solves the latency and interference challenges inherent in high-availability industrial networking:

• Immunity to Electromagnetic Interference (EMI): The fiber optic core eliminates electrical noise pick-up from nearby high-voltage motor leads or variable frequency drives (VFDs). This ensures that the synchronization signal remains clean, preventing accidental or "nuisance" chassis switchovers.

• High-Bandwidth Synchronization: Supporting transmission speeds near 1000 Mbps, this cable handles the massive data volume required to mirror the memory of high-capacity L7 and L8 processors. It keeps the secondary controller in a "ready" state with zero data lag.

• Optimal 3-Meter Reach: The 3-meter length provides the necessary slack for mounting redundant chassis in separate enclosures or across wide 19-inch racks. This physical separation protects the backup system from localized thermal events or mechanical damage affecting the primary rack.

• Low-Attenuation 1300nm Wavelength: The cable utilizes the 1300nm wavelength to minimize signal loss over the link. This precise optical tuning ensures that the redundancy modules maintain a rock-solid heartbeat connection without the need for signal repeaters.

• Industrial-Grade Durability: Despite its high-sensitivity optical core, the 1756-RMC3 features a ruggedized jacket that resists the vibration and temperature fluctuations common in heavy manufacturing environments.

FAQs

• Can I use the 1756-RMC3 with 1756-RM2 modules?

  Yes. The 1756-RMC3 is fully compatible with both the legacy 1756-RM and the modern 1756-RM2 redundancy modules. It provides the standard physical interface required for the synchronization ports on these modules.

• How do I verify the "Brand New" condition of this fiber cable?

  We guarantee that every 1756-RMC3 arrives in its original Allen-Bradley factory packaging with intact security seals. Every cable carries a unique UPC (612598560851) for full manufacturer traceability, confirming the unit has never been installed or stressed in a field environment.

• What is the minimum bend radius for this cable?

  While the cable is flexible, you must avoid sharp kinks. Adhere to standard fiber optic installation practices by maintaining a bend radius of at least 2 inches (50mm). Sharp bends can fracture the fiber core or cause excessive light attenuation, leading to synchronization errors.

• Is this cable available in other lengths?

  Yes, Allen-Bradley offers the RMC series in various lengths, such as the 1-meter (1756-RMC1) or 10-meter (1756-RMC10) versions. The 1756-RMC3 is the most common choice for adjacent-cabinet or side-by-side rack installations.