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公开(公告)号:WO1998013806A1
公开(公告)日:1998-04-02
申请号:PCT/US1997016465
申请日:1997-09-17
Applicant: ROSEMOUNT INC.
Inventor: ROSEMOUNT INC. , ANDERSON, Stephen, D. , JOHNSON, Theodore, L. , JUNK, Brian, S. , ORMAN, Michael, A. , SCHNAARE, Theodore, H. , TETZLAFF, David, E.
IPC: G08C19/02
CPC classification number: H02M7/219 , G08C19/02 , Y10T307/858 , Y10T307/865
Abstract: A field instrument (10) includes an input circuit (26) having a transistor bridge rectifier (Q1, Q2, Q3, Q4) which is couplable to a power supply. The transistor bridge rectifier (Q1, Q2, Q3, Q4) is configured to provide power from the power supply to a remainder of the field instrument (10).
Abstract translation: 现场仪器(10)包括具有可与电源耦合的晶体管桥式整流器(Q1,Q2,Q3,Q4)的输入电路(26)。 晶体管桥式整流器(Q1,Q2,Q3,Q4)被配置为从电源向现场仪器(10)的其余部分提供电力。
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公开(公告)号:WO1996041243A1
公开(公告)日:1996-12-19
申请号:PCT/US1996008128
申请日:1996-05-31
Applicant: ROSEMOUNT INC.
Inventor: ROSEMOUNT INC. , WESTFIELD, Brian, L. , ANDERSON, Stephen, D. , LOUWAGIE, Bennett, L. , PIECHOWSKI, Todd, A.
IPC: G05B19/042
CPC classification number: G05B19/0423 , G05B19/4185 , G05B2219/25189 , G05B2219/25191 , G05B2219/31121 , G05B2219/31126 , G05B2219/31135 , G05B2219/33197 , Y02P90/18
Abstract: Conversion circuitry (40) for use in a process control system (10) is adapted for coupling to a primary process control loop (26). Digital receiver circuitry (46, 52) in the conversion circuitry (40) receives a digital signal transmitted over the primary process control loop (26) from a field transmitter (22) and responsively provides a digital output. A microprocessor (50) receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry (62) for coupling to a secondary process control loop (58) receives the secondary loop control output from the microprocessor (50) and responsively controls current flowing through the secondary process control loop (58). The current flowing through the secondary process control loop (58) is related to the digital signal transmitted by the field transmitter (22).
Abstract translation: 用于过程控制系统(10)的转换电路(40)适于耦合到主过程控制回路(26)。 转换电路(40)中的数字接收器电路(46,52)从现场发射器(22)接收通过主要过程控制回路(26)发送的数字信号,并且响应地提供数字输出。 微处理器(50)接收数字输出并且响应地提供辅助回路控制输出。 用于耦合到次级过程控制回路(58)的二次回路控制电路(62)接收来自微处理器(50)的次级回路控制输出,并且响应地控制流过次级过程控制回路(58)的电流。 流过二级过程控制回路(58)的电流与由现场发射机(22)发送的数字信号有关。
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公开(公告)号:WO1993006576A1
公开(公告)日:1993-04-01
申请号:PCT/US1992007038
申请日:1992-08-20
Applicant: ROSEMOUNT INC.
Inventor: ROSEMOUNT INC. , ANDERSON, Stephen, D. , FRICK, Roger, L. , MONZO, Glen, E. , WESTFIELD, Brian, L.
IPC: G08C19/00
CPC classification number: G08C19/02
Abstract: A three wire transmitter (50) bidirectionally communicates AC signals to and from a first external device (59) and sends DC signals to a second external device (59). The transmitter (50) includes a sensor circuit (52) and a communication circuit (70), both energized from power (66) and common (69) terminals of the transmitter (50). The communication circuit (70) receives a sensor output indicating a sensed process variable and provide DC and AC signals to a signal terminal (68) which connects to both external devices (59), and also receives AC signals from the first external device (59). The DC signal is representative of the sensed process variable and the AC signal is digitally representative of the sensed process variable and of transmitter data selected by the received AC signal.
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公开(公告)号:EP0870288A1
公开(公告)日:1998-10-14
申请号:EP97941662.0
申请日:1997-09-17
Applicant: ROSEMOUNT INC.
Inventor: ANDERSON, Stephen, D. , JOHNSON, Theodore, L. , JUNK, Brian, S. , ORMAN, Michael, A. , SCHNAARE, Theodore, H. , TETZLAFF, David, E.
CPC classification number: H02M7/219 , G08C19/02 , Y10T307/858 , Y10T307/865
Abstract: A field instrument (10) includes an input circuit (26) having a transistor bridge rectifier (Q1, Q2, Q3, Q4) which is couplable to a power supply. The transistor bridge rectifier (Q1, Q2, Q3, Q4) is configured to provide power from the power supply to a remainder of the field instrument (10).
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公开(公告)号:EP0606260A1
公开(公告)日:1994-07-20
申请号:EP92919210.0
申请日:1992-08-20
Applicant: ROSEMOUNT INC.
Inventor: ANDERSON, Stephen, D. , FRICK, Roger, L. , MONZO, Glen, E. , WESTFIELD, Brian, L.
IPC: G08C19
CPC classification number: G08C19/02
Abstract: Un émetteur (50) à trois fils communique de manière bidirectionnelle des signaux en courant alternatif vers un premier dispositif externe (59) et inversement, et envoie des signaux en courant continu vers un second dispositif externe (59). L'émetteur (50) comprend un circuit détecteur (52) ainsi qu'un circuit de transmission (70), tous deux excités par une borne d'alimentation (66) et une borne commune (69) de l'émetteur (50). Le circuit de transmission (70) reçoit un signal de sortie du détecteur indiquant une variable de traitement détectée, et fournit des signaux en ca et cc à une borne de signaux (68) qui est connectée aux deux dispositifs externes (59) et qui reçoit également des signaux en ca du premier dispositif externe (59). Le signal cc est représentatif de la variable de traitement détectée, et le ca est une représentation numérique de la variable de traitement détectée et de données d'émetteur sélectionnées par le signal en ca reçu.
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公开(公告)号:EP0830646A1
公开(公告)日:1998-03-25
申请号:EP96920591.0
申请日:1996-05-31
Applicant: ROSEMOUNT INC.
Inventor: WESTFIELD, Brian, L. , ANDERSON, Stephen, D. , LOUWAGIE, Bennett, L. , PIECHOWSKI, Todd, A.
CPC classification number: G05B19/0423 , G05B19/4185 , G05B2219/25189 , G05B2219/25191 , G05B2219/31121 , G05B2219/31126 , G05B2219/31135 , G05B2219/33197 , Y02P90/18
Abstract: Conversion circuitry (40) for use in a process control system (10) is adapted for coupling to a primary process control loop (26). Digital receiver circuitry (46, 52) in the conversion circuitry (40) receives a digital signal transmitted over the primary process control loop (26) from a field transmitter (22) and responsively provides a digital output. A microprocessor (50) receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry (62) for coupling to a secondary process control loop (58) receives the secondary loop control output from the microprocessor (50) and responsively controls current flowing through the secondary process control loop (58). The current flowing through the secondary process control loop (58) is related to the digital signal transmitted by the field transmitter (22).
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公开(公告)号:EP0870288B1
公开(公告)日:2003-05-02
申请号:EP97941662.5
申请日:1997-09-17
Applicant: ROSEMOUNT INC.
Inventor: ANDERSON, Stephen, D. , JOHNSON, Theodore, L. , JUNK, Brian, S. , ORMAN, Michael, A. , SCHNAARE, Theodore, H. , TETZLAFF, David, E.
CPC classification number: H02M7/219 , G08C19/02 , Y10T307/858 , Y10T307/865
Abstract: A field instrument (10) includes an input circuit (26) having a transistor bridge rectifier (Q1, Q2, Q3, Q4) which is couplable to a power supply. The transistor bridge rectifier (Q1, Q2, Q3, Q4) is configured to provide power from the power supply to a remainder of the field instrument (10).
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公开(公告)号:EP0830646B1
公开(公告)日:2001-10-24
申请号:EP96920591.3
申请日:1996-05-31
Applicant: ROSEMOUNT INC.
Inventor: WESTFIELD, Brian, L. , ANDERSON, Stephen, D. , LOUWAGIE, Bennett, L. , PIECHOWSKI, Todd, A.
IPC: G05B19/042 , G05B19/418
CPC classification number: G05B19/0423 , G05B19/4185 , G05B2219/25189 , G05B2219/25191 , G05B2219/31121 , G05B2219/31126 , G05B2219/31135 , G05B2219/33197 , Y02P90/18
Abstract: Conversion circuitry (40) for use in a process control system (10) is adapted for coupling to a primary process control loop (26). Digital receiver circuitry (46, 52) in the conversion circuitry (40) receives a digital signal transmitted over the primary process control loop (26) from a field transmitter (22) and responsively provides a digital output. A microprocessor (50) receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry (62) for coupling to a secondary process control loop (58) receives the secondary loop control output from the microprocessor (50) and responsively controls current flowing through the secondary process control loop (58). The current flowing through the secondary process control loop (58) is related to the digital signal transmitted by the field transmitter (22).
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