Control circuit for controlling voltage supply to electric devices

A control circuit for controlling the voltage supply to selected ones of a plurality of output terminals to which controllable devices or circuits are connected, said control circuit comprising presetable function switches, said function switches being coupled to an integrated circuit providing output logic signals to feed an interlock circuit to select the operation of at least one of a plurality of high voltage electronic switching devices, an interface circuit connected between said switching devices and said interlock circuit to trigger the operation of said selected switching devices to connect a high voltage supply to associated ones of said output terminals, and to prevent feedback voltage surges from said at least one switching device to protect electronic circuits in said control circuit, and an overcurrent protection circuit connected between an output of said high voltage electronic switching devices and said integrated circuit to disable said output logic signals and said interlock circuit to cut said high voltage supply at said output terminals when the current flowing through said high voltage electronic switching devices exceeds a predetermined reference value.