Allen-Bradley 1786-RPFS ControlNET Fiber Module

The Allen-Bradley 1786-RPFS ControlNet Fiber Module is a short-distance fiber optic repeater for ControlNet networks. It extends fiber segments between network devices, helping preserve signal integrity and EMI immunity by running ControlNet data over fiber where copper would be less reliable in industrial environments. As part of Rockwell Automation’s 1786 ControlNet fiber media family, the RPFS is designed to be paired with other fiber modules to form a resilient fiber backbone for automation applications and remote locations. The module carries the ControlNet protocol over a fiber link, enabling reliable communication across short hops and between nodes in environments with electrical noise or long-in-the-plant distances that favor fiber media. Typical use cases include linking remote I/O clusters or bridging ControlNet nodes within a factory floor where fiber’s immunity to EMI and reduced ground-loop susceptibility are advantageous. The 1786-RPFS designation identifies it as the short-distance fiber repeater variant, intended to maintain network timing and data flow across adjacent fiber segments without converting to copper at intermediate points. This description reflects the product’s official title and its placement within the 1786 family of ControlNet devices, offering a clear option for engineers seeking a dedicated fiber solution for near-range ControlNet extensions.