Field device of a process automation assembly with two inherently safe power supply devices

摘要

The field device (1) comprises integrated safe power supply unit (4). The locally renewed electrical energy is supplied to a power generating unit (6) which is formed as an electro-thermal or photovoltaic converter. An electronic unit (2) comprises a safe electronic circuit (7), where the electronic unit has a reverse current circuit or a current limiter or a voltage limiter.