... single-phase ac voltage to realize the. According to the requirements of customers, and can increase the soft start function. Widely used for light, heat ... 285 VAC ~ 420 VAC; (3) (4) no polar requirements.3 COM, for in-house module, CON for control terminals, + 5 V ... .6 V or so for adjustable area, that is, with the increase of the control voltage, the voltage ac load from 0 volts increases to ...