... phase ac voltage transformer, synchronization is the collection module phase detection circuit, phase shifting trigger circuit, ... 3) (4) no polar requirements.3 COM, for in-house module, CON for control terminals, + 5 V for ... , reliable shut off the output of the module; CON in 0.8 ~ 4.6 V or so ... . 4 ~ 20mA input "G" pressure regulating module can't use manually adjust potentiometer3 single-phase ac ...