Positioner
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United States of America Patent
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Jun 27, 2017
Grant Date -
Nov 1, 2012
app pub date -
Apr 25, 2012
filing date -
Apr 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
The invention relates to a positioner (10) for an actuator (12) comprising a processing unit (22) and an output unit (20) which can be connected to an actuating drive (15) of an actuator (12), as well as a measurement unit (24). The invention is characterized in that said positioner (10) comprises a current source (26) which can be connected to a voltage source (30) of a control system (14) via a single two-wire current loop (28). The invention furthermore relates to a method for operating a positioner (10) including the transmission of measuring values recorded in the positioner (10) to a higher-level controller (14). The method is characterized in that the actuating signals are transmitted in a digital form whereas the measuring data is transmitted to a higher-level controller in an analog form, with both digital and analog signals being transmitted on the same two-wire line.
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