Patent ID: 9329070
Filing Date: 2016-05-03
CPC Classification: G01D,G01F

Claim Text:
1. An apparatus for reducing or minimizing disturbance signals in a field device of process automation, wherein the field device includes a control/evaluation unit and a sensor, comprising: at least one main electronics; at least one sensor electronics; at least one data line, via which said main electronics and said sensor electronics communicate, wherein said at least one data line is embodied in such a manner that it allows unidirectional and/or bidirectional data transmission between the control/evaluation unit and the sensor; at least one galvanic isolating component, which is integrated into said at least one data line and which prevents transmission of disturbance signals via said at least one data line; power supply lines without galvanic isolation, via which the main electronics and the sensor electronics are connected with one another; via which a power supply voltage sufficient for operation of the sensor is made available to the sensor; and filter means in the power supply lines, which are designed in such a manner that predetermined requirements for disturbance resistance of said power supply lines are fulfilled, wherein one or more capacitors are placed in front of and/or connected after said filter means, between a power supply line as well as to ground.