Relay circuit

The utility model relates to an electricity control device especially relates to a relay circuit, the utility model discloses an input circuit and trigger the output circuit of control circuit and input circuit coupling through the opto-coupler, the utility model discloses an input circuit's first input end and second input output low level (or high level) control signal to first optocoupler and second optocoupler to prevent that relay solenoid from to entire system's interference, and then sending the input of relay through the triode, control contact's actuation or disconnection are got up input circuit and output circuit coupling by the first optocoupler and second optocoupler, thereby are cut off the electrical link between input circuit and the output circuit, and its insulation resistance can reach 1011, does not also have the electromagnetic induction phenomenon, the utility model discloses simple structure can go to control the heavy current function by enough undercurrents, plays automatically regulated, safety protection, converting circuit effect in the in circuit.