Display device for process automation engineering, has microcontroller for evaluating digital current signal and for controlling display unit, which represents actual measuring value and corresponding status information of transducer

摘要

The device (A) has a microcontroller for evaluating digital current signal and for controlling a display unit (AE), where a two-conductive-current loop transfers measuring valve and status information of a transducer as the digital current signal. The display unit represents actual measuring value and corresponding status information. The display device is provided with energy by the loop. A switch contact (SK) is provided in the display device, where the switch contact is controlled based on the measuring value or the status information on the microcontroller.