The S750DR-AUX auxiliary switch displays the contact position of the S750DR main circuit breakers independently and potential-free using two changeover contacts. A function test button can be used to simulate a change in the contact position in order to check that the contact position is displayed correctly without switching the main device. The changeover contacts meet the requirements of protective separation. They are suitable for SELV and PELV circuits. The auxiliary switch can be attached to the S750DR 1-4-pole devices provided for this purpose without tools.
