FIELD DEVICE WITH A PROTECTIVE CIRCUIT

摘要

Field device (FG) in process automation engineering comprising a protective circuit (SS) between a communication interface (K) of the field device (FG) and a signal processing unit (BE) of the field device (FG), wherein the communication interface (K) is preferably an Ethernet port of the field device (FG), wherein the communication interface (K) and the signal processing unit (BE) have a first device provided between them that is used for limiting current, wherein the first device (E1) for limiting current and the signal processing unit (BE) have an apparatus (V) provided between them that is used for limiting voltage, and wherein the apparatus (V) for limiting voltage and the signal processing unit (BE) have a second device (E2) provided between them that is used for limiting power.