The Allen-Bradley 1786-RPFRL/B is a ControlNet Fiber-Optic Ring Long-Distance Repeater Module. It is designed to extend ControlNet networks using fiber-optic cable and supports a redundant fiber-ring topology. It provides two fiber channels and a relay contact for communication/system-status monitoring. Rockwell specifies a typical repeater distance of up to 10 km for the 1786-RPFRL/B.
Features
- Long-distance ControlNet fiber repeater for extending network communication.
- Supports two fiber channels for redundant ring operation.
- Supports up to approximately 10 km between repeaters, subject to fiber quality and optical loss.
- 5 Mbps ControlNet communication.
- Fiber communication provides improved immunity to electromagnetic interference (EMI) compared with copper media.
- Provides ground isolation between connected network nodes.
- Includes a relay contact connector for communication and system-status monitoring.
- Requires the 1786-RPA/B Modular Repeater Adapter for power and data-flow control.
- Can be used in ring, star, and point-to-point fiber network configurations, depending on the overall ControlNet architecture.
Typical Applications
- Long-distance ControlNet networks
- ControlLogix communication systems
- Redundant industrial communication networks
- Marine and offshore automation
- Process-control systems
- Large manufacturing facilities
- EMI-sensitive industrial environments
- Distributed PLC and I/O systems
