Product Overview
The Allen-Bradley 1756-RMC1 fiber optic cable is a critical component for building reliable ControlLogix redundant controller systems. This 1-meter cable connects 1756-RM2 and 1756-RM2K redundancy modules, ensuring fault-tolerant communication. Designed to prevent signal loss and physical damage, the 1756-RMC1 avoids sharp bends and features protective caps. Its compact length minimizes clutter in control panels, reducing the risk of abrasion or cuts—a common failure point in industrial fiber optic links.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1756-RMC1 |
| Series |
ControlLogix |
| Module Type |
Fiber Optic Cable |
| Length |
3.28 feet (1 meter) |
| Wavelength |
1300 Newton Meters |
| Transmission |
Less than 1000 MB-Second |
| Channels |
1 |
| Operating Temperature |
32-140°F (0-60°C) |
| Enclosure |
None |
| Wire Size |
20 AWG |
| Dimensions |
5.51 x 4.41 x 5.71 inches |
Industry Applications
In process control, power generation, and manufacturing, the Allen-Bradley 1756-RMC1 ensures uninterrupted communication between redundant controllers. For example, in a chemical plant, a single fault on one fiber channel will not disrupt the system, maintaining process stability. The cable's 1300 nm wavelength and <1000 MB/s transmission support real-time data exchange critical for safety and efficiency.
Installation & Setup Guidance
Before installing the Allen-Bradley 1756-RMC1, remove the protective caps from both ends. Connect the cable at the bottom of the redundancy module in a downward orientation. Do not force sharp bends; use the LC connector coupler to maintain a gentle curve and allow easy disconnection. Route the cable away from moving equipment or areas prone to abrasion to prevent damage.
Maintenance & Reliability
Inspect the 1756-RMC1 cable periodically for cuts, kinks, or crushed sections. Clean the LC connectors with a lint-free wipe to maintain signal quality. Since the cable contains optical fibers, avoid tension exceeding the rated load. Regular checks prevent intermittent faults that could compromise redundancy. Replacing a damaged 1756-RMC1 promptly restores full system reliability.
Selection Guide & Purchasing Advice
When ordering, verify that your system uses ControlLogix redundancy modules (1756-RM2 or 1756-RM2K). The 1756-RMC1 is the shortest available cable—ideal for tight panels. For longer runs, consider other cables in the 1756-RMCx series. UBEST Automation (ubest101) stocks genuine Allen-Bradley 1756-RMC1 cables with fast shipping. Ensure you have the correct part number before purchase.