Digital control board matched for Galaxy 7000 UPS. It samples voltage and current signals of AC input, inverter output and battery bus, executes closed-loop voltage regulation, synchronization logic and fault protection. It communicates with human-machine panel and power drive module, and triggers alarm or shutdown when overvoltage, overcurrent and phase loss faults occur.

Certification: CE, UL

Main CPU chip, signal sampling circuit, communication transceiver, relay interlock assembly, status LED and terminal connector. Common faults: sampling offset, communication interruption, relay contact failure and chip burnout.