TWO -WIRE INDUSTRIAL PROCESS FIELD DEVICE MAXIMIZING THE POWER AVAILABLE TO THE CIRCUITRY OF THE DEVICE AT MINIMUM CONTROL LOOP CURRENT

A process field device (104) for use in monitoring or controlling an industrial process includes first and second loop terminals (162, 164) configured to couple to a two- wire industrial process control loop (108). Field device circuitry (168) is configured to monitor or control a process variable o...

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Bibliographic Details
Main Author SCHULTE, JOHN P
Format Patent
LanguageEnglish
French
Published 17.11.2011
Subjects
CONTROL OR REGULATING SYSTEMS IN GENERAL
CONTROLLING
FUNCTIONAL ELEMENTS OF SUCH SYSTEMS
MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS
PHYSICS
REGULATING
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Summary:A process field device (104) for use in monitoring or controlling an industrial process includes first and second loop terminals (162, 164) configured to couple to a two- wire industrial process control loop (108). Field device circuitry (168) is configured to monitor or control a process variable of the industrial process. The field device circuitry (168) is powered by power connections from the two-wire industrial process control loop (108). A current regulator (220) is connected in series with the two-wire industrial process control loop (108), the first and second loop terminals (162, 164) and the field device circuitry (168). A voltage regulator (282) is connected in parallel with the current regulator (220) and in series with the two-wire industrial process control loop (108), first and second loop terminals (162, 164) and field device circuitry (168).
Bibliography:Application Number: CA20112800660