The Allen-Bradley 1786-RPFM/A is a ControlNet Medium-Distance Fiber Repeater Module, Series A, designed to extend ControlNet communication over multimode fiber. It provides electrical/ground isolation and is suitable for noisy industrial environments. The fiber link can extend a ControlNet network up to 3 km (9,843 ft).
Features
- Extends ControlNet communication over medium-distance fiber links.
- Supports fiber distances up to 3 km under specified optical-loss conditions.
- Provides ground isolation between network nodes.
- Less susceptible to electrical noise than copper-based communication media.
- Uses ST fiber connectors and 62.5/125 µm multimode fiber.
- Supports point-to-point and star network configurations.
- Designed to work with the 1786-RPA/B repeater adapter; up to four modules can be attached subject to the adapter’s power limit.
Typical Applications
- ControlNet network extension in industrial automation systems
- Connecting ControlNet devices across long distances
- Factory-floor communication between separated control panels
- Communication in electrically noisy industrial environments
- Fiber-based links between PLC/control-system sections
- Ground-isolated ControlNet communication between different areas of a facility





























