Endress + Hauser Gmbh + Co. Kg

Endress+hauserse+co. Kg

Christoph Schleith

Wolfgang Brutschin

Bernd Strütt

Bernd Strutt

Michael Dötsch

Benjamin Monse

Jurgen Meier

Jürgen Meier

Ralf Armbruster

Apparatus for determining and/or monitoring at least one limit value of a process variable of a medium in a container, comprising at least one sensor unit for registering a measured value dependent on the process variable and at least one electronics unit for producing a measurement signal dependent on the process variable. The invention is distinguished by features including that the apparatus is embodied to draw energy via a voltage output and a digital input of a recorder apparatus or a process control system.

Apparatus for determining and/or monitoring a limit value of a process variable

A circuit arrangement for the protection of at least one component of a two wire electrical current loop, which is connected in series with a burden to an AC/DC electrical current source. The two wire electrical current loop has a rectifier a clock signal producer and a switch. The rectifier forms a DC circuit, wherein the component is connected in the DC circuit and wherein the clock signal producer outputs a clock signal to the switch for clocking the DC circuit. The circuit arrangement has a diode, wherein the conduction direction of the diode points from the anode of the diode to the cathode of the diode. The cathode of the diode is connected to the DC circuit, and the anode of the diode is supplied with a periodic or constant voltage from a first voltage source, and the voltage is at least periodically greater than a predetermined threshold value.

Circuit arrangement for the protection of at least one component of a two wire electrical current loop

A measuring device, comprising: an input circuit having a supply line and a return line. Energy supply occurs over a line-pair. Input voltage is applied to the measuring device via the line pair. A series regulator for controlling an electrical current flowing via the line-pair, a shunt regulator installed in a parallel branch, and an apparatus for controlling a voltage drop across the series regulator are provided.

Measuring device for measuring a precess variable in industrial measurements and control technology

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Schopfheim, Germany

Christoph Schleith