| 摘要 |
The invention relates to a safety switching device (10), for the safe switching on and off of an electrical user (24), in particular, an electric motor, with an electromechanical switching element (12), comprising at least one adjustable working contact (14), with a supply unit (26) to produce a working voltage (U'B) for the switch element (12) and with a reducing unit (30), which reduces the operating voltage (U'B) supplied to the switching element (12), from a higher (U1) to a lower (U2) voltage value. The invention is characterised in that the supply unit (26) is a variable unit with adjustable output voltage (UA) and that the reducing unit (30) determines the output voltage (UA) of the supply unit (26), depending upon the operating state. |
