Two-wire field device for the process automation technology for the connection of at least one sensor element

摘要

A two-wire field device for the process automation technology for the connection of at least one sensor element has a first supply stage v1, which via a first 2 - conductors - terminal a1 can be connected with a field bus fb. By way of the field bus fb completely the field device is supplied with energy. The two-wire field device comprises a second supply part v2, which is connected to the first supply part v1 and which, by way of a second 2 - conductors - terminal a2 for the power supply of a sensor bus sb serves. Furthermore, a field bus communication fke, the with the first 2 - conductors - terminal a1 and the first supply stage v1 is connected and which serves for the exchange of data via the fieldbus, and a sensor unit skeleton a bus communication, with the second 2 - conductors - terminal a2 and the second power supply v2 and which is connected for data exchange via the sensor bus is used, is provided. With the field bus communication fsk, a bus communication, the sensor unit ske and the first supply stage v1 is connected to a processing module vm. According to the invention, the field bus fb and the sensor bus sb galvanically separated from each other.