... side,COM-negative side, this power from the internal controller to provide isolation.8. ~ 220V power supply controller inputInput and output interface circuit:The ... the indicator light on the panel. For input, theimportation of low-level (a timely closure of) lights, but lights out, ... output, output for the low 0:00, the lights out,but lights.4, operation flow chart:Controller always work in one of ...