Semaphore supervisory circuits

The utility model relates to a semaphore supervisory circuits, pass through supervisory circuits and a plurality of drive circuit that the CAN bus links to each other including master control circuit and with master control circuit, master control circuit is used for issuing banks control command, drive circuit is used for receiving control command drives corresponding red, yellow, green signal lamp work, supervisory circuits is used for real -time detection circuit fault and judges relevant fault, through drive output signal K1 and the yellow sudden strain of a muscle of the independent control signal of K2 machine. The utility model discloses the fault monitoring and the independently yellow sudden strain of a muscle control of semaphore have effectively been realized, need not to connect every amber light output of drive circuit to supervisory circuits in parallel that the wiring simply, supervisory circuits also need not AC control's relevant components and parts simultaneously, and safe and reliable uses