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

摘要

The invention relates to a 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 the power supply of an electronic unit (2) for process control in an integrated storage element (5). In order to supply intrinsically safe field devices (1) with locally stored electrical energy as required, it is proposed that at least one further intrinsically safe power supply unit (4) is integrated, which is fed by a power generation unit (6) that provides locally renewable electrical energy.