Technical Specifications Compatible with incremental pulse encoder signal input. Encoder power supply output channel. Low‑voltage differential signal interface. Auxiliary power supplied by host drive. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Signal channel surge protection.
Functional Features Receives pulse and direction signals from motor incremental encoder. Processes feedback pulse signals and transmits speed‑position data to drive main control board. Provides working power for external encoder. Detects encoder signal loss and wiring fault. On‑board LED indicators display signal input status and fault alarm. Built‑in hardware self‑diagnosis monitors signal channel condition.
Application Scenarios Encoder feedback spare module for ABB series frequency converters. Applied in closed‑loop speed control occasions requiring high‑precision motor speed regulation.
Performance Parameters High‑frequency pulse signal receiving capability. Accurate speed signal conversion performance. Reliable encoder fault detection function.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Pulse signal processing and conditioning assemblies. Plug‑in gold‑plated edge connector and encoder signal terminals.
Structural Characteristics Small‑size plug‑in module for converter control unit slot. Front side fitted with encoder signal terminals and status LED indicators. Rear side adopts gold‑plated edge connector for connecting drive main board.
Working Principle Incremental pulse signals from motor encoder enter FEN‑31 through signal terminals. Internal circuit completes pulse shaping and counting processing, calculated motor speed and position data is transmitted to drive main control board via edge connector.
Installation Requirements Insert FEN‑31 into designated slot of drive control unit until connector is fully seated. Connect encoder shielded cable to front‑end signal terminals. Restore power supply, configure encoder related parameters in drive, verify motor closed‑loop speed regulation performance.
Usage Notes Use shielded cable for encoder wiring, separate from high‑power power cable. Confirm encoder type and parameter match module configuration. Hot‑plug operation under powered condition is prohibited.
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