PURPOSE: To prevent the burning of a load by supplying a reverse current at ON of a switching element driven by an input signal when an operation switch is OFF to drive a notifying circuit.

CONSTITUTION: A remote control circuit is composed of an operation side power source 1, an operation switch 2, a forward current conducting series circuit 5 of a load opening/closing relay 3 and a first diode 4, an input signal circuit 6, a reverse current conducting series circuit 11, a conducting direction switching circuit 13, and a notifying circuit 19. When the switch 2 is closed, stationary contacts 2b, 2c are short-circuited therebetween by a movable contact 2g, stationary circuits 2e, 2f are short-circuited therebetween by a movable contact 2h, thereby setting a load circuit to an operating state. In this case, even if a photodiode 8 is turned ON, it is ignored by a diode 10, and a light emitting diode 15 is not lit. When the switch 2 is opened, the contacts 2a, 2b are short-circuited therebetween, but the diode 15 is not similarly lit. In this case, when the relay 3 is energized by fusion-bonding, it is lit to know of trouble.