The relay is activated by pulse or continuous excitation of the coils A1-A2 or B1-B2. While both systems are simultaneously excited, the locking is released, and the contact position corresponds to the excitation of coil A1-A2. All contacts are located on the same magnetic system, which is connected to A1 and A2. This ensures that no undefined contact states occur during the simultaneous excitation of both systems, in accordance with IEC/EN 61 810-1, with manual operation and contact position indication via a switch lever.