Product Core Brief
- Model: RFO810 (often mounted on RMU811 base unit)
- Brand: ABB
- Series: Symphony Plus / S+ Control and I/O / Harmony Rack / Melody DCS
- Core Function: High-speed optical bus repeater that converts electrical communication signals to fiber optic signals (and vice versa) to extend the distance of HN800 / CW800 control buses between distributed I/O racks and controllers.
- Type: Fiber Optic Repeater Module
- Key Specs: Multi-mode / Single-mode optical fiber transceivers, electrical HN800 bus interface, DIN-rail mounting via RMU811 base unit, dual 24 V DC redundant power supply feeds, diagnostic LEDs
- Condition: New Original (New Surplus) / Tested Surplus
Product Introduction
In power generation, water treatment, and large industrial processing facilities running ABB Symphony Plus (S+) distributed control systems (DCS), controllers must communicate seamlessly with remote I/O cabinets spread across wide geographical plant layouts. The ABB RFO810 is a specialized fiber optic repeater module designed to extend the reach of the HN800 system bus.
By converting electrical HN800 signals into optical pulses transmitted over glass fiber cables, the RFO810 enables long-distance bus extension while providing immune protection against high-voltage electrical noise, ground loops, and lightning surges common in heavy industrial sites.
