FAIL-SAFE LIMIT LEVEL SWITCH
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Accused Products
Abstract
The present disclosure relates to an apparatus for determining and/or monitoring a predetermined fill level of a medium in a containment, comprising a sensor unit and an electronics unit. The electronics unit includes a limiting unit embodied to limit an electrical current or an electrical voltage in at least one portion of the electronics unit, a switching unit embodied to control a process switch having at least first and second switch states, and a signal transformation unit embodied to transform a dynamic, electrical input signal into a static, electrical output signal, and wherein the static output signal flows through at least one component of the electronics unit. Furthermore, the electronics unit is embodied to supply the sensor unit with an excitation signal, to receive from the sensor unit a received signal, to determine and/or to monitor whether the predetermined fill level has been reached, and to produce at least one control signal.
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26 Claims
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1-13. -13. (canceled)
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14. An apparatus for determining and/or monitoring a predetermined fill level of a medium in a containment, comprising:
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a sensor unit; and an electronics unit operable by means of a dynamic, electrical signal, wherein the electronics unit includes; a limiting unit embodied to limit an electrical current or an electrical voltage in a portion of the electronics unit at a predeterminable value; a switching unit embodied to control via an electrical control signal a process switch element having at least first and second switch states; and a signal transformation unit embodied to transform a dynamic, electrical input signal into a static, electrical output signal, wherein the signal transformation unit is arranged such that the static output signal flows through a component of the electronics unit, wherein the electronics unit is embodied to supply the sensor unit with an excitation signal, and to receive from the sensor unit a received signal, to determine and/or to monitor, based on the received signal, whether the predetermined fill level has been reached, and to produce a control signal as a function of whether the predetermined fill level has been reached. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification