Allen-Bradley ControlNet 1786-RPFM Fiber Ring Medium-Distance Repeater

Product Description

Allen-Bradley ControlNet Fiber Ring Repeater – Model: 1786-RPFM  The 1786-RPFM is a medium-distance fiber repeater module designed for ControlNet communication systems. It enables stable multimode fiber connectivity and supports multiple topologies including star, linear, ring, and point-to-point. Operating at 1300 nm wavelength with a communication rate of 5 Mbps, this module ensures reliable data transmission up to 3 km, making it ideal for distributed industrial networks.

Technical Specifications

• Brand: Allen-Bradley

• Product Line: 1786 Repeaters

• Model: 1786-RPFM

• Type: Medium-Distance Fiber Repeater Module

• Communication Family: ControlNet

• Fiber Type: 62.5/125 µm multimode OM-1

• Fiber Termination: ST connectors (plastic or ceramic)

• Operating Wavelength: 1300 nm

• Communication Rate: 5 Mbps

• Typical Distance: 0–3 km

• Attenuation: 13.3 dB

• TX Power: –16 dBm (62.5/125 µm fiber), –19.5 dBm (50/125 µm fiber)

• RX Responsivity: ≥ 32.8 dBm @ 25 °C

• Supported Topologies: Star, Linear, Ring, Point-to-Point

• Mounting Options: Panel mount or DIN rail

• Orientation: Vertical or Horizontal

• Input Power: 5 VDC

• Backplane Current Draw: 400 mA

• Max Power Consumption: 2 W

• Operating Temperature: 0–60 °C (32–140 °F)

• Non-Operating Temperature: –40–85 °C (–40–185 °F)

• Weight: 0.63 lbs (0.28 kg)

Application Scenarios

• Fiber optic ControlNet networks requiring medium-distance communication

• Industrial automation systems with ring or star topology

• Distributed control systems needing reliable multimode fiber connectivity

• Environments requiring robust data transmission over extended distances

FAQ

Q: What is the maximum communication distance supported?  A: The 1786-RPFM supports fiber communication up to 3 km.

Q: Which fiber type is compatible?  A: It is designed for 62.5/125 µm multimode OM-1 fiber, with ST connectors.

Q: What topologies can be implemented?  A: Star, linear, ring, and point-to-point configurations are supported.