It is used for regular room ventilation, cyclic dehumidification, light control, circulating pumps, noon signs, etc.Function Features：2 time functions: Cycler beginning with pulse ，Cycler beginning with pause，Function choice is done by an external jumper of terminals S-A1. Time scale 0.1 s - 100 days devided into 10 time ranges: (0.1 s - 1 s / 1 s - 10 s / 0.1 min - 1 min / 1 min - 10 min / 0.1 hrs - 1 h / 1 hrs - 10 hrs / 0.1 day - 1 day /1 day - 10 days /3 days - 30 days / 10 days - 100 days). Relay status is indicated by LED. 1-MODULE,DIN rail mounting.