Abstract: A field device having a safe interface is based on two voltage regulators designed to set electrical current between corresponding contacts of the interface. The field device tests via which of the contacts the field device is connected with a superordinate unit and an automatic configuration of the interface can be performed for the appropriate transmission standard. Because the contacting to the superordinated unit is checked repetitively by means of two electrical current regulators it is assured that the field device can determine and automatically react to a change of the contacting at the interface even during measurement operation. This makes the interface safe and thereby increases the safety of the process plant, in which the field device is applied.

Abstract: A field device having a safe interface is based on two voltage regulators designed to set electrical current between corresponding contacts of the interface. The field device tests via which of the contacts the field device is connected with a superordinate unit and an automatic configuration of the interface can be performed for the appropriate transmission standard. Because the contacting to the superordinated unit is checked repetitively by means of two electrical current regulators it is assured that the field device can determine and automatically react to a change of the contacting at the interface even during measurement operation. This makes the interface safe and thereby increases the safety of the process plant, in which the field device is applied.

Abstract: The present invention relates to an apparatus for determining and/or monitoring at least one process variable of a medium, comprising a sensor unit for registering a value for the process variable, a time registration unit for registering at least one duration of operation and a calculating unit, which is embodied at least based on the duration of operation registered by the time registration unit and based on at least one influencing variable influencing the duration of operation to make at least one statement with reference to condition of at least one component of the apparatus. Furthermore, the present invention relates to a method for operating an apparatus of the invention.

Abstract: A method for operating a fieldbus protocol capable field device, wherein the fieldbus protocol includes at least one command, which serves, depending on a value of an auxiliary variable, for performing a first function, respectively for performing a second function, of field device, wherein the first and second functions differ from one another.

Abstract: A method for operating a fieldbus protocol capable field device, wherein the fieldbus protocol includes at least one command, which serves, depending on a value of an auxiliary variable, for performing a first function, respectively for performing a second function, of field device, wherein the first and second functions differ from one another.

Abstract: A method for data transmission by telegram via a fieldbus of process automation technology, wherein information is transmitted via the fieldbus in the form of data in at least one telegram, and wherein the information, especially the same information, is transmitted in the at least one telegram in a first data format and in a second data format, wherein the first data format differs from the second data format.

Abstract: A method for data transmission by telegram via a fieldbus of process automation technology, wherein information is transmitted via the fieldbus in the form of data in at least one telegram, and wherein the information, especially the same information, is transmitted in the at least one telegram in a first data format and in a second data format, wherein the first data format differs from the second data format.