Field device of a process automation system with an intrinsically safe power supply device

摘要

Field device (1) of a process automation system, with at least one first intrinsically safe power supply unit (3) which provides locally stored electrical energy for powering an electronic unit (2) for process control in an integrated, consuming storage element (5), characterized in that at least one further intrinsically safe power supply unit (4) is integrated, which is fed by a locally renewable electrical energy generating power generating unit (6) and that electrical switching means are provided, the further intrinsically safe power supply unit (4) during normal operation before the first intrinsically safe power supply unit (3 ) on the electronics unit (2).