Technical Specifications Multi‑channel analog signal input, digital data output interface, auxiliary DC control power supply. Operating temperature 0 ℃ to +60 ℃, storage temperature ‑40 ℃ to +85 ℃, non‑condensing relative humidity 5%‑95%. Conformal coated circuit board.
Functional Features Receives analog voltage and current sampling signal from power unit. Completes analog signal filtering and amplitude conditioning. Executes high‑precision analog‑digital conversion. Transmits digital sampling data to main control board. Detects sampling channel over‑range and signal loss fault.
Application Scenarios Spare signal processing board for ABB high‑power converter and excitation system. Applied in power energy equipment maintenance project.
Performance Parameters High‑precision multi‑channel analog‑digital conversion performance. Stable analog signal anti‑interference processing capability. Reliable sampling channel fault detection function.
Material Composition Multilayer glass‑fiber epoxy printed circuit board. Analog signal conditioning circuit, analog‑digital conversion chip, data transmission peripheral assemblies. Multi‑pin plug‑in connectors and metal screw mounting hardware. Conformal protective coating layer.
Structural Characteristics Rectangular circuit‑board structure. Power‑unit‑side analog input connectors and main‑control‑side data output connectors are distributed on different edges. Reserved screw mounting holes for cabinet installation. Analog sampling area and digital transmission area maintain layout separation.
Working Principle UFC721BE101 obtains auxiliary DC power supply. Analog sampling signals from power unit enter input channels, pass through filtering and amplitude adjustment circuit. Analog‑digital conversion chip converts analog quantity into digital data, and transmits digital sampling value to main control board through data interface.
Installation Requirements Cut off main high‑voltage power and all auxiliary control power before replacement. Implement anti‑static protection during handling. Fasten board to cabinet mounting bracket with screws. Fully insert and lock each plug‑in connector. Restore auxiliary power supply, verify sampling measuring value consistency under static simulation condition.
Usage Notes Sampling signal wiring polarity must be correct. Anti‑static measures are mandatory. Hot‑plug under powered condition is prohibited. Keep conformal coating layer complete.
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