Field device for a processing plant and method for supplying the field device

摘要

In a method or device for powering a field device for a processing plant, the field device is driven by a process signal of an electrical power supply so that an electronic unit connected to the power supply outputs a process control signal. A required power level of the electronic unit is determined for outputting the control signal. A portion of an electrical power of the power supply exceeding the required power level is stored.