Technical Specifications Multi‑channel AC and DC power sampling input, internal power conversion circuit. Auxiliary power supplied by excitation rack, typical power consumption 7.3 W. Operating temperature ‑10 ℃ to +55 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Conformal coated surface, isolation voltage 2000 V AC.
Functional Features Samples excitation power unit voltage and current signals. Realizes internal power conversion for on‑board circuit. Generates power‑supply abnormal alarm signal. On‑board LED indicates power and fault status. Built‑in hardware self‑diagnosis function. Conformal coating improves environmental adaptability.
Application Scenarios Internal spare‑part for generator excitation system of power plant. Used for equipment overhaul and spare‑part replacement.
Performance Parameters High‑precision sampling for power loop signals. Stable internal power conversion output. Self‑diagnosis rapidly detects power circuit abnormality.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Power sampling components, power conversion chips, optocoupler isolation assemblies. Conformal protective coating. Multi‑pin back‑plane plug‑in connectors. Screw‑type signal terminals.
Structural Characteristics Plug‑in circuit board matching excitation cabinet inner slot. Board edge fitted with back‑plane connector and signal terminals. Reserved mechanical fixing holes. Weight approximately 0.63 kilogram.
Working Principle After power‑on, the board finishes hardware self‑check. It samples voltage and current signals from excitation power loop. Signals are processed and transmitted to main regulator board via back‑plane bus. Internal power conversion circuit provides stable working voltage for on‑board components. Diagnosis circuit monitors power supply status continuously.
Installation Requirements Cut off all power sources of excitation cabinet before replacement. Insert UFC911B101 board into designated slot and tighten fixing screws. Confirm connectors are fully engaged. Restore power supply and complete power‑sampling function verification test.
Usage Notes Adopt anti‑static wrist strap during disassembly‑assembly. Do not scratch conformal coating. Hot‑plug operation is forbidden. Perform full‑set excitation system test after spare‑part replacement.
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