Abstract: The control station comprises an enclosure having two terminal blocks disposed therein. Each terminal block has a set or normally opened and normally closed contacts which are mechanically interlocked and movable into an open and closed position respectively by an actuating lever. The ground terminals of each set of contacts on each terminal block are electrically interlocked for common connection to an external ground line. The wiring terminals of the normally closed contacts are electrically interlocked to provide a parallel connection through the respective normally closed contacts between an external circuit and the ground line. The terminal of the normally open contact on each terminal block is electrically connected to an external circuit, each proceeding an independent sequence for some controlled device when the contact is closed.