公开(公告)号：US11579641B2

公开(公告)日：2023-02-14

申请号：US17049690

申请日：2020-03-26

Applicant: Rosemount Inc.

Inventor： Yevgeny Aleksandrovich Matveyev ,  Pavel Pavlovich Schmidt ,  Nikolay Alekseevich Isaev ,  Sergey Valerievich Dubrovin ,  Valentin Gennadievich Varnak

IPC: H02J1/06 ,  G05F1/46 ,  H02J13/00

Abstract: An industrial process field device includes first and second loop terminals configured to couple to a two-wire process control loop. Device circuitry is powered from the process control loop and monitors a process variable or controls a control device. A current regulator is in series with the loop terminals, and regulates a loop current. A first shunt voltage regulator regulates a voltage across the device circuitry. Supplemental circuitry is connected in series with the first shunt voltage regulator and the second loop terminal, and is powered by power from the two-wire process control loop shunted through the first shunt voltage regulator. A second shunt voltage regulator is connected in series with the first shunt voltage regulator and the second loop terminal, and in parallel with the supplemental circuitry, and regulates a voltage across the supplemental circuitry.

公开(公告)号：US20210303010A1

公开(公告)日：2021-09-30

申请号：US17049690

申请日：2020-03-26

Applicant: Rosemount Inc.

Inventor： Yevgeny Aleksandrovich Matveyev ,  Pavel Pavlovich Schmidt ,  Nikolay Alekseevich Isaev ,  Sergey Valerievich Dubrovin ,  Valentin Gennadievich Varnak

IPC: G05F1/46 ,  H02J13/00 ,  H02J1/06

Abstract: An industrial process field device includes first and second loop terminals configured to couple to a two-wire process control loop. Device circuitry is powered from the process control loop and monitors a process variable or controls a control device. A current regulator is in series with the loop terminals, and regulates a loop current. A first shunt voltage regulator regulates a voltage across the device circuitry. Supplemental circuitry is connected in series with the first shunt voltage regulator and the second loop terminal, and is powered by power from the two-wire process control loop shunted through the first shunt voltage regulator. A second shunt voltage regulator is connected in series with the first shunt voltage regulator and the second loop terminal, and in parallel with the supplemental circuitry, and regulates a voltage across the supplemental circuitry.