... electric valve opening and closing.Specification1,Operating valve ,380V 50Hz, three phase four wire system.2,Control power, BFA-1 1.1Kw ... valve controller for automatic control system, 12, 13, 14 terminals used to "auto away" and "auto off" the corresponding signal input ... the stop key, cut off the three-phase power supply, change any of the three-phase power supply two phase. 5,Press the off button ...