Parallel Control System with excellent quality,good service, and pretty competitive price YPU-B3 Main Control Board Description1. Pass the national standard certificate,4 layers2. American ATMEL series CPU, Bms watchdog assure the safety.3. Suitable for 2-8 floor, single speed, two speed, frequency conversion4. Binary code, decimal code and 7-segment code are optional 5. Apply to electric hoist, ...