Allen‑Bradley 1786-RPFRXL B ControlNet Fiber Repeater Module

Allen‑Bradley 1786-RPFRXL B is a long-distance fiber optic repeater module for ControlNet industrial communication network. It converts electrical ControlNet signals into optical signals, extending communication distance and isolating electrical interference between network segments.

This module supports single-mode fiber transmission, equipped with status indicators for network and fiber link. It can repeat and regenerate ControlNet bus signals without affecting the network schedule. Widely used as spare parts for long-distance ControlNet network transformation in manufacturing and petrochemical plants.

Main Specifications

1. Brand: Allen‑Bradley; Model: 1786-RPFRXL B; Type: ControlNet Fiber Repeater Module
2. Compatible System: Rockwell ControlNet industrial communication network
3. Core Functions: Electrical/optical signal conversion, signal regeneration, network isolation, long-distance transmission
4. Fiber Type: Single-mode fiber; Interface: SC fiber connector, ControlNet coaxial port
5. Power Supply: 24VDC; Operating Temperature: 0℃ ~ +60℃; Panel mounting
6. Feature: Link status LED, electrical isolation, signal reshaping and re-timing
7. Supply Status: Original Allen‑Bradley spare repeater module for ControlNet network maintenance

Core Functions

1. Convert ControlNet coaxial electrical signals to optical signals for long-distance transmission via single-mode fiber.
2. Regenerate and reshape communication signals to reduce signal attenuation and distortion over long cables.
3. Provide electrical isolation between two network segments to block ground loop interference and protect network equipment.
4. Front panel LED indicators show power status, network activity and fiber link fault for quick site diagnosis.
5. Maintain original ControlNet network timing and schedule, no extra configuration required for most applications.
6. Extend ControlNet network span, connect control rooms and field equipment across large factory areas.

Application Scenarios

1. Long-distance communication extension unit for Rockwell ControlNet network in large manufacturing plants.
2. Fault repeater replacement and routine maintenance of existing ControlNet industrial communication systems.
3. Industrial network renovation for petrochemical, automobile production and heavy machinery factories.
4. Emergency replacement for module failure to restore long-distance fiber ControlNet communication links.
5. Spare parts stocking for maintenance teams operating Rockwell ControlNet automation platforms.
6. Aftermarket spare supply for ControlNet network upgrade and field control system reconstruction projects.

FAQ

1. Q: Can Allen‑Bradley 1786-RPFRXL B use multi-mode fiber?
   A: This model is designed for single-mode fiber, multi-mode fiber cannot match its optical transceiver parameters.
2. Q: What are typical repeater module failure symptoms?
   A: Fiber link alarm, ControlNet network communication loss, LED fault light lit, signal cannot be transmitted.
3. Q: How to complete commissioning and diagnosis?
   A: Check 24VDC power, connect fiber and coaxial cable, verify LED status and test ControlNet network communication.