APPARATUS FOR SENSING VITAL CONTACT OF RELAY

摘要

PURPOSE: An apparatus for sensing a vital contact of a relay is provided to detect a breaking phenomenon and a shortcircuit phenomenon of a signal line and an abnormal state of a circuit by improving a structure of the relay. CONSTITUTION: A driver(70) is used for receiving a pulse signal and generating a driving signal(P). A transmitter(80) is used for receiving the driving signal(P) outputting a transmission signal(T_OUT) and an inversion signal(/T_OUT), and outputting a transmission read signal(T_READ) and an inversion transmission read signal(/T_READ) by inverting the transmission signal(T_OUT) and the inversion signal(/T_OUT). A relay(100) is used for receiving the transmission signal(T_OUT) and outputting a reception signal(R_IN) according to magnetization of a coil(101). A receiver(90) is used for inverting the reception signal(R_IN) of the relay(100) and the inversion signal(/T_OUT) of the transmitter(80).