| 摘要 |
A field device of a process automation installation is provided. The filed device includes an electrical connection configured to be connected to a superordinate control unit, a fluidic pressure connection configured to supply an operating pressure as an auxiliary energy, and a means for local feeding with electrical energy integrated into the field device. The means for local feeding with electrical energy includes a fluidic operating voltage production unit, which includes a piezo-element arrangement having at least part of the operating pressure is applied thereto to produce the electrical energy for the local feed.
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