The invention relates to an autarkic field device or anautarkic radio adapter (2) for a field device (1), ofautomation technology fed with limited energy via an energysupply unit (3)associated, or associable, with the fielddevice (1) or the radio adapter (2), characterized in that,between the energy supply unit (3) and an internal voltagesource (4), whose voltage exceeds, or at times can exceed, thevoltage of the energy supply unit (3), a barrier (5a; 5b) ofat least one diode group having at least two diodes (6)connected in parallel is arranged, which blocks flow ofelectrical current from the internal voltage source (4) to theenergy supply unit (3) or to the connection terminals (7) ofthe field device (1) or of the radio adapter (2) for theenergy supply unit (3).
展开▼
