Honeywell 51197564‑100 MU‑FOAE02 UCN Fiber Optic Extender

Product Description

51197564‑100 (MU‑FOAE02) is an external standalone fiber optic extender for Honeywell UCN (Universal Control Network). It adopts a compact metal casing and accepts 85‑235V AC wide‑range power input. The converter realizes mutual conversion between UCN coaxial electrical signal and optical signal, extending the transmission distance of the UCN bus up to 2 kilometers. It is equipped with power, active and fault indicator lamps, built‑in signal isolation and self‑diagnosis circuits, and can resist strong electromagnetic interference in industrial sites. It is an important network accessory of Experion PKS DCS system.

Product Functions

• Convert UCN coaxial electrical bus signals to optical signals and restore optical signals back to electrical signals
• Extend the communication distance of UCN control network and break the distance limit of coaxial cable
• Electrical isolation between local and remote network segments to block surge and electromagnetic noise interference
• Real‑time hardware self‑diagnosis for power failure, optical link breakage and signal loss
• LED status indicators display power supply, running state and communication fault alarm

• Match Honeywell UCN controllers and field devices to build long‑distance distributed control network topology

  
  

Application Scenarios

• Petrochemical and refinery Experion PKS DCS long‑distance UCN network layout
• Thermal power plant, boiler and turbine control system with dispersed control rooms
• Offshore platforms, LNG plants and natural gas processing facilities with harsh EMI environment
• Large chemical plants, pulp and paper factories with wide distribution of workshop control nodes
• Transformation and upgrading of old Honeywell UCN systems requiring longer‑distance bus transmission

Common Problems

• Optical link disconnected and UCN device offline: Dirty optical port, damaged fiber cable, loose optical connector or excessive optical attenuation.
• Power indicator off and no operation: AC power input missing, power fuse blown or internal power circuit failure.
• Intermittent communication flicker and unstable network: Poor fiber bending radius, optical connector contamination or ground potential difference interference.
• Fault alarm light is always on: Mismatched sending/receiving extender models, wrong TX/RX crossover connection or internal optical module aging.
• Network communication delay increases obviously: Optical signal attenuation too large, dust accumulated on optical transceiver window or long‑term overheating of the casing.