Field device electronics fed by an external electrical...

Details Field device electronics fed by an external electrical... Field device electronics fed by an external electrical...

2007-07-03

2010-11-30

Kundu, Sujoy K (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system in a specific environment

Electrical signal parameter measurement system

C324S600000, C323S209000

Reexamination Certificate

active

07844410

ABSTRACT:
The field-device electronics includes an electric current adjuster, through which a supply current flows, driven by a supply voltage provided by the external energy supply and adjusted by the current adjuster. Additionally, the field-device electronics includes an internal operating and evaluating circuit for controlling the field device, as well as an internal supply circuit feeding the internal operating and evaluating circuit. Provided in the supply circuit is a first useful-voltage controller flowed-through by a first component of the supply current, and a second useful-voltage controller flowed through, at least at times, by a second current component of the supply current, and providing in the field-device electronics a second internal, useful voltage. Further, the two useful-voltage controllers are galvanically separated from one another.

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