Groovy electromotor starts, stop to need to use two button, in be controlled at many o'clock, need pushbutton lead more. Use a pushbutton many a little bit to accuse those who make motor remotely to rise stop, can simplify control line road saves lead again. If plan institute is shown, its job principle is: When starting. Press pushbutton AN, 1J coil gets relay report is sucked close, 1J often opens contact to close, communicate electrify of contactor C coil, c is sucked amalgamative from the lock. Electromotor starts. The Chang Kaifu of C is aided touch a head to close, often shut head of auxiliary costal region to disconnect. At this moment, relay the coil of 2J because of 1J often shut contact to already disconnected and cannot electrify, so 2J cannot be sucked close. Loose pushbutton AN, because C already was locked up oneself, so communication contactor C still is sucked close, electromotor continues to run. But 1J is loosened because of AN and cut off the power at this moment release, its often shut contact restoration, to put through 2J makes good preparation. Press in the 2nd pushbutton AN, at this moment relay 1J coil access often is shut to touch a head to cut off by C, so U won't be sucked close, and 2J coil electrify is sucked close. 2J is sucked after closing, its often shut contact to disconnect, cut off C coil power source, c cuts off the power release, electromotor stops turn.