the circuit of timing controller part 2

Published:2011/6/8 9:19:00 Author:Ariel Wang | Keyword: timing , controller | From:SeekIC

When you reach the timing time (5min),it outputs high level from Y5 end of IC2.The trigger ItS overturns to D1.D4 outputs high level.D2 and D3 output low level.K releases.The normally open contacts cut off the working power supply of load.At the same time,VL dies out.At this moment,if S3 at the position 9 of single timing ,then the time of timing goes back.IC2 stops counting.If S3 at the position of circulation ,then IC2 goes on counting.After 5MIN,the end of YO outputs high level.Trigger RS overturns.K pulls back again. The load is conducted to work.The timing time (5min) goes back,Y5 end of IC2 outputs high level,trigger ItS overturns again……The circle goes on,the load intermittent works.



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