The Allen-Bradley 1786-RPFRL is a specialized long-distance fiber ring repeater module designed for ControlNet networks requiring extended coverage and high reliability. This module enables fiber-optic ring topologies that span up to 30 km between nodes, making it essential for distributed automation in oil and gas, water treatment, and large manufacturing facilities. By converting electrical ControlNet signals to optical signals, the 1786-RPFRL eliminates ground loops and provides immunity to electromagnetic interference (EMI), ensuring stable communication in harsh environments. The module supports redundant ring configurations to maintain network integrity even if a single fiber link fails. With its robust enclosure and wide operating temperature range, the 1786RPFRL is built for continuous duty in demanding industrial settings. Installation is straightforward via standard BNC connectors for fiber cables, requiring no special tools or software. Below are the detailed technical specifications for this module.
| Parameter |
Specification |
| Product Type |
Long-Distance Fiber Ring Repeater Module |
| Model Number |
1786-RPFRL |
| Network Compatibility |
ControlNet (coax and fiber media) |
| Max Distance Between Nodes (Fiber) |
30 km (18.6 miles) with single-mode fiber |
| Fiber Connector Type |
ST (standard BNC-style) for duplex fiber |
| Data Rate |
5 Mbps (ControlNet standard) |
| Topology Support |
Ring (redundant), star, or daisy-chain |
| Redundancy |
Supports fiber ring with automatic failover |
| Operating Voltage |
24 VDC (nominal), 18-30 VDC range |
| Power Consumption |
6 W typical |
| Operating Temperature |
-20°C to +60°C (-4°F to +140°F) |
| Storage Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Humidity |
5% to 95% non-condensing |
| Enclosure Rating |
IP20 (open style, suitable for cabinet mounting) |
| Dimensions (H x W x D) |
4.5" x 3.2" x 1.5" (114 mm x 81 mm x 38 mm) |
| Weight |
0.5 lb (0.23 kg) |
| LED Indicators |
Power, Link Status, Fault, Ring Status |
| Certifications |
CE, UL, CSA, ATEX (for hazardous locations) |
| MTBF |
1,000,000 hours (minimum) |
| Warranty |
Standard 2-year manufacturer warranty |
What Does Our Clients Say
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Great product!
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