Technical Specifications Multi‑channel analog sampling input, isolated drive output. Auxiliary power supply supplied by excitation frame, typical power consumption 7.1 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 between signal channels.
Functional Features Samples generator voltage and current feedback signals. Executes signal conditioning and galvanic isolation. Outputs drive pulse signal for excitation power unit. On‑board LED indicates working and fault status. Built‑in hardware self‑diagnosis function.
Application Scenarios Core spare‑part for generator excitation system in thermal power plant, hydropower station and industrial self‑power plant. Used for equipment overhaul and spare‑part replacement.
Performance Parameters High‑precision sampling for excitation feedback signal. Stable pulse drive output meets excitation adjustment timing requirement. Conformal coating enhances moisture‑proof and dust‑proof capability for cabinet environment.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Sampling and signal processing chips, optocoupler isolation components. Conformal protective coating layer. Multi‑pin plug‑in back‑plane connectors. Screw‑type signal terminals.
Structural Characteristics Plug‑in circuit board structure matching excitation cabinet internal slot. Board edge equipped with back‑plane connector and signal terminals. Reserved mechanical fixing holes. Weight approximately 0.61 kilogram.
Working Principle After power‑on, board completes hardware self‑check. It receives generator voltage and current feedback signal, performs conditioning and isolation processing. According to control command from main excitation controller, it outputs corresponding drive pulse to excitation power unit. Diagnosis circuit continuously monitors board hardware state.
Installation Requirements Cut off all power supply of excitation cabinet before replacement. Insert UAA326A02 board into designated slot and tighten fixing screws. Confirm connectors are fully engaged. Restore power supply, download relevant excitation parameters and complete whole‑set function test.
Usage Notes Adopt anti‑static wrist strap during disassembly‑assembly. Do not scratch conformal coating surface. Forbid hot‑plug operation under powered condition.
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