| 摘要 |
<p>The invention relates to an independent field device or an independent wireless adapter (2) for a field device (1) in automation technology, said adapter/device being provided with a limited amount of energy by way of an energy supply unit (3) that is assigned to or can be assigned to the field device (1) or to the wireless adapter (2), characterized in that a barrier (5a; 5b) is disposed between the energy supply unit and an internal voltage source (4), the voltage of which exceeds or can sometimes exceed the voltage of the energy supply unit (3), said barrier made up of at least one diode group comprising at least two diodes (6) connected in parallel, wherein the barrier blocks a reverse charging current from the internal voltage source (4) to the energy supply unit (3) or to the connection terminals (7) of the field device (1) or of the wireless adapter (2) for the energy supply unit (3).</p> |
