UFC921A101 3BHE024855R0101 is the front-end high-precision signal preprocessing core of UNITROL excitation control system. It adopts high-isolation transformer sampling architecture to collect three-phase PT secondary voltage and CT secondary current waveforms of synchronous generators, completes filtering, amplification and high-speed AD conversion locally, and transmits accurate synchronous measurement data to the main processor via dedicated Masterbus300 real-time bus for automatic voltage regulation, reactive power distribution, grid synchronization and loss-of-synchronism interlock logic calculation. The board integrates independent pulse signal conditioning circuit to process encoder speed feedback and thyristor trigger feedback signals, and outputs fault interlock signals to block excitation pulses when sampling signals are abnormal. Full conformal coated PCB with 3000VAC high isolation withstand voltage, it effectively suppresses strong electromagnetic interference in power plant environments, and is the irreplaceable core replacement spare part for thermal power, hydropower and gas turbine generator excitation cabinets.UFC921A101 3BHE024855R0101 是 UNITROL 励磁控制系统前端高精度信号预处理核心，采用高隔离互感器采样架构，采集同步发电机三相 PT 二次电压、CT 二次电流波形，本地完成滤波、放大与高速模数转换，通过专用 Masterbus300 实时总线向主控传输精准同步测量数据，用于自动调压、无功均分、同期并网、失步联锁逻辑运算；板卡集成独立脉冲信号调理回路，处理编码器转速反馈、晶闸管触发反馈信号，采样信号异常时输出故障联锁信号封锁励磁脉冲。全板三防涂层 PCB，具备 3000VAC 高隔离耐压，可有效抑制电厂工况强电磁干扰，是火电、水电、燃气轮发电机励磁控制柜不可替代的核心替换备件。