starting button on installing light circuit

Published:2011/7/5 8:46:00 Author:John | Keyword: starting button, light | From:SeekIC

Typically, the motor’s starting button ST and stopping button STP both have no lights. Therefore, it is inconvenient to observe whether the motor work on the operation table or screen. A light (LED H) is installed on the starting button, just as shown in the figure. H is usually lit. But when the ST is pressed, KM is pull and its normally open auxiliary contact KM closes. Then the H is short only to find that the light is not lit. The on-and-off of the light can indicate whether the motor is turned on.



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