... of single phase ac voltage transformer, synchronization is the collection module phase detection circuit, phase shifting trigger circuit, and output ... and cathode by the (2).2, (3) (4) for module with internal department transformer primary, there are 220 VAC and 380 ... resistance KΩ between. 4 ~ 20mA input "G" pressure regulating module can't use manually adjust potentiometer3 single-phase ac induction ...