WO2001088644A2 - Two-wire field-mounted process device - Google Patents
Two-wire field-mounted process device Download PDFInfo
- Publication number
- WO2001088644A2 WO2001088644A2 PCT/US2001/014719 US0114719W WO0188644A2 WO 2001088644 A2 WO2001088644 A2 WO 2001088644A2 US 0114719 W US0114719 W US 0114719W WO 0188644 A2 WO0188644 A2 WO 0188644A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- controller
- coupled
- loop
- wire
- channel
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/181—Enclosures
- G06F1/182—Enclosures with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI]
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/05—Digital input using the sampling of an analogue quantity at regular intervals of time, input from a/d converter or output to d/a converter
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1462—Mounting supporting structure in casing or on frame or rack for programmable logic controllers [PLC] for automation or industrial process control
- H05K7/1468—Mechanical features of input/output (I/O) modules
- H05K7/1472—Bus coupling modules, e.g. bus distribution modules
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/14—Mounting supporting structure in casing or on frame or rack
- H05K7/1462—Mounting supporting structure in casing or on frame or rack for programmable logic controllers [PLC] for automation or industrial process control
- H05K7/1484—Electrical diagrams relating to constructional features, e.g. signal routing within PLC; Provisions for disaster recovery, e.g. redundant systems
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1127—Selector for I-O, multiplex for I-O
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1157—I-O used either as input or as output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/11—Plc I-O input output
- G05B2219/1163—Multiplexer for analog signals
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/14—Plc safety
- G05B2219/14144—Galvanic isolation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/15—Plc structure of the system
- G05B2219/15091—Power and data bus
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25188—Superposition high frequency data signal on power lines, current carrier
Definitions
- the present invention relates to process devices. More specifically, the present invention relates to field-mounted process control and measurement devices.
- Process devices are used to measure and control industrial processes such as the refining of petrochemicals, the processing of food, the generation of electric power, and a number of other processes.
- Process measurement devices include process variable transmitters, which measure a process variable such as pressure or temperature and communicate the measured variable to a process controller.
- an actuator such as a valve controller or the like.
- process control is accomplished using a combination of transmitters, actuators, and a process controller that communicate across a process control loop to a controller. Both types of process devices interact with the physical process through process interface elements.
- Process interface elements are devices which relate electrical signals to physical process conditions, and include devices such as sensors, limit switches, valve controllers, heaters, motor controllers, and a number of other devices.
- the process controller is typically a microcomputer located in a control room away from the process.
- the process controller can receive process information from one or more process measurement devices and apply a suitable control signal to one or more process control devices to influence the process and thereby control it.
- transmitters and actuators are generally mounted near the process in the field.
- process devices are often subjected to temperature extremes, vibration, corrosive and/or flammable environments, and electrical noise.
- process devices are designed specifically for "field-mounting.”
- Such field-mounted devices utilize robust enclosures, which can be designed to be explosion-proof.
- field-mounted process devices can also be designed with circuitry that is said to be “intrinsically safe", which means that even under fault conditions, the circuitry will generally not contain enough electrical energy to generate a spark or a surface temperature that can cause an explosion in the presence ' of an hazardous atmosphere.
- Two-wire process devices couple to the control room using a two-wire process control loop.
- Two-wire devices receive power from the process control loop, and communicate over the process control loop in a manner that is generally unaffected by the provision of power to the process device.
- Techniques for communicating over two-wires include 4-20 mA signaling, the Highway Addressable Remote Transducer (HART®) Protocol, FOUNDATIONTM Fieldbus, Profibus-PA and others.
- HART® Highway Addressable Remote Transducer
- FOUNDATIONTM Fieldbus Profibus-PA
- two-wire process control systems provide wiring simplification, such systems provide a limited amount of electrical power to connected devices. For example, a device that communicates in accordance with 4-20 mA signaling must draw no more than 4 mA otherwise the device's current consumption would affect the process variable.
- the frugal power budget of two-wire process devices has traditionally limited the functionality that could be provided.
- transmitters with two sensor inputs reduce the number of transmitters/sensor and thereby reduce wiring costs as well as overall system costs.
- One example of such a transmitter is the Model 3244MV Multivariable Temperature Transmitter, available from Rosemount Inc., of Eden Prairie, Minnesota.
- thermocouple wire spans the distance between the measurement "point" and the control room are generally less expensive than the cost of obtaining a number of single or dual sensor transmitters, however, a significant wiring effort is required, and process measurement is rendered more susceptible to electrical noise due to the long runs.
- the process device includes multiple isolated channels includes a channel that can be an input channel or an output channel.
- the given input or output channel can couple to multiple sensors or actuators, respectively.
- the process device is wholly powered by the two-wire process control loop.
- the process device includes a controller adapted to measure one or more characteristics of sensors coupled to an input channel and to control actuators coupled to an output channel.
- the process device also includes a loop communicator that is adapted to communicate over the two-wire loop.
- the two-wire field- mounted process device includes a controller that is adapted to execute a user generated control algorithm relating process input information with process output commands.
- the process device of this embodiment also includes a loop communicator that is adapted to communicate over the two-wire loop.
- FIG. 1 is a diagrammatic view of a process control system employing a two-wire field mounted process device in accordance with an embodiment of the present invention.
- Fig. 2 is a system block diagram of the process device shown in Fig. 1.
- Fig. 3 is a system block diagram of a method of providing a process variable with a field-mounted process device in accordance with an embodiment of the present invention.
- Fig. 4 is a system block diagram of a method of operating a field-mounted process device in accordance with an embodiment of the present invention.
- a two-wire field mountable process device 16 shown in Fig. 1 is provided which can be adapted to execute sophisticated user generated control algorith s, much like those used with traditional programmable logic controllers.
- Embodiments can include input channels, output channels, and any combination of the two. Generally, each channel is isolated from the remainder of the process device. Such isolation removes ground loop errors that currently limit multiple input transmitters.
- power management is such that embodiments of the present invention are wholly powered by a two-wire process loop 14.
- Fig. 1 is a diagrammatic view of process control system 10 which includes control room 12, process control loop 14 and process device 16.
- Process control system can comprise a single process device coupled to control room 12, however system 10 can also include hundreds of process devices coupled to one or more control rooms over a number of process control loops.
- Control room 12 is typically a facility- located away from device 16 that includes a microcomputer. A user stationed in control room 12 uses the microcomputer to interact with various process devices through process control loop 14 and thus controls the process (es) from the control room. For clarity, control room 12 is illustrated as a single block. However, in some control system embodiments, control room 12 may in fact couple process control loop 14 to a global computer network, such as the internet, so that users worldwide could access process device 16 from traditional web browser software.
- a global computer network such as the internet
- Loop 14 is a two-wire process control loop.
- the HART® protocol, the FOUNDATIONTM Fieldbus protocol, and the Profibus-PA protocol can be used with embodiments of the present invention.
- Loop 14 provides power to iconnected process devices while providing communication between the various devices .
- Process device 16 includes cover 17 and base 19 which are preferably constructed from a suitable plastic material.
- Base 19 is adapted to mate with an industry standard DIN rail for mounting.
- device 16 is adapted to operate solely upon electrical power received through loop 14, and is adapted for field-mounting.
- device 16 is configured to withstand a relatively large temperature range (such as -40 to 85 deg. C), mechanical vibrations, and relative humidity in excess of 90%.
- a relatively large temperature range such as -40 to 85 deg. C
- mechanical vibrations mechanical vibrations
- relative humidity in excess of 90%.
- Such environmental resistance is effected primarily through the selection of robust components, as will be described later in the specification.
- Optional enclosure 18 (shown in phantom) provides added durability and can be any known enclosure such as a National Electrical Manufacturers Association (NEMA) enclosure, or an explosion-proof enclosure.
- NEMA National Electrical Manufacturers Association
- FIG. 1 has a number of inputs and outputs, and includes suitable computing circuitry (shown in Fig. 2) to execute a user generated control algorithm.
- the algorithm is comprised of a number of logic statements relating specific input events to outputs controlled by device 16.
- the user can change the algorithm either by interfacing locally with device 16, or by communicating with device 16 over control loop 14.
- the algorithm can be generated using conventional logic generation software such as Relay Ladder Logic and Sequential Function Charts (SFC's).
- SFC's Relay Ladder Logic and Sequential Function Charts
- device 16 can be considered a two-wire field- mountable programmable logic controller.
- Process device 16 is coupled to sensors 20, 22, 24, 26, 28 and 30 as well as actuators 32 and 34.
- Sensors 20, 22 and 24 are thermocouples, of known type, which are coupled to various process points to provide voltage signals based upon process variables at the respective process points.
- Resistance Temperature Devices (RTD's) 26, 28 and 30 are also coupled to various process points and provide a resistance that is based upon process temperature at the respective process points.
- RTD 26 is coupled to device 16 through a known three-wire connection and illustrates that various wiring configurations can be used with embodiments of the present invention.
- Actuators 32 and 34 are coupled to process device 16 and actuate suitable valves, switches and the like based upon control signals from device 16.
- device 16 can execute a user generated control algorithm to relate specific input conditions to specific output commands. For example, device 16 may sense a process fluid temperature, and cause actuator 32 to engage a heater coupled to the process fluid in order to maintain the fluid temperature at a selected level.
- Fig. 2 is a system block diagram of device 16 shown in Fig. 1.
- Device 16 includes loop communicator 36, power module 38, controller 40, and channels 42, 44, 46, 48, and memory 52.
- Loop communicator 36 is coupled to process control loop 14 and is adapted for bi-directional data communication over loop 14.
- Loop communicator 36 can include a known communication device such as a traditional FOUNDATIONTM Fieldbus communication controller or the like. Additionally, communicator 36 can include suitable isolation circuitry to facilitate compliance with the intrinsic safety specification as set forth in the Factory Mutual Approval Standard entitled ⁇ Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Division 1 Hazardous (Classified) Locations," Class Number 3610, published October 1988.
- Power module 38 is coupled to loop 14 such that power module 38 provides power to all components of device 16 based upon power received from loop 14.
- power module 38 has a single arrow 50 indicating that power module 38 provides power to all components, it is noted that such power can be provided at multiple voltages.
- power module 38 preferably includes a switching power supply that provides electrical power at a plurality of voltages.
- some components such as the A/D converters and the isolators can receive a higher voltage such as 4.9 volts, while low-power components such the controller 40, memory 52 and loop communicator 36 receive a lower voltage such as 3.0 volts.
- power module 38 is preferably programmable to such an extent that at least one of the voltages provided can be varied.
- Controller 40 is coupled to memory 52 and executes program instructions stored therein.
- Memory 52 is preferably low-power memory operating on 3.0 volts, such as the model LRS1331, available from Sharp Electronics. Additionally, memory 52 can be "stacked" memory in which both flash memory and volatile memory are provided on a single memory module.
- the user generated control algorithm, or "program” executed by controller 40 can be changed by a user either by coupling to device 16 locally, or by accessing device 16 through loop 14. In some embodiments the program includes instructions that relate process event inputs to outputs determined by controller 40.
- device 16 functions similarly to a programmable logic controller, which is a device that typically has not been robust enough for field-mounting, nor able to operate on the low power levels of two-wire field devices.
- a programmable logic controller by so providing the functions of a programmable logic controller, much more sophisticated process control algorithms can be implemented through a user friendly interface, such as Relay Ladder Logic or the like.
- Controller 40 receives power from module 38, and communicates with loop communicator 36.
- Controller 40 preferably includes a low-power microprocessor such as the model MMC 2075 microprocessor available from Motorola Inc. of Schaumburg, IL. Additionally, controller 40 preferably has a selectable internal clock rate such that the clock rate of controller 40, and thus the computing speed and power consumption, can be selected through suitable commands sent to device 16 over loop 14. Since higher clock speeds will cause controller 40 to draw more power, clock selection of controller 40, and selection of the voltage level provided by power module 38 to controller 40 are preferably performed in tandem. In this manner the processing speed and power consumption of device 16 are selectable and vary together.
- Controller 40 is coupled to the various channels through interface bus 54, which is preferably a serial bus designed for high speed data communication such as a Synchronous Peripheral Interface (SPI) .
- interface bus 54 is preferably a serial bus designed for high speed data communication such as a Synchronous Peripheral Interface (SPI) .
- Channels 42, 44, 46 and 48 are coupled to bus 54 through communication isolators 56, 58, 60 and 62, respectively, which are preferably known optoisolators, but which can be any suitable isolation devices such as transformers or capacitors.
- channels 42, 44, 46 and 48 provide data in parallel form
- parallel-serial converters 64 are used to translate the data between serial and parallel forms.
- converters 64 are Universal Asynchronous Receiver/Transmitters (UART's) .
- Channel 42 is coupled to controller 40, and includes sensor terminals 1 - n, multiplexer (MUX) 66, analog-to-digital (A/D) converter 68, communication isolator 56, and power isolator 70. It is contemplated that communication isolator 56 and power isolator 70 can be combined in a single circuit.
- Channel 42 is specifically adapted to measure a specific sensor type such as thermocouples, resistance temperature devices, strain gauges, pressure sensors, or other sensor type.
- Each sensor terminal is adapted to couple a single sensor, such as a thermocouple, to multiplexer 66.
- Multiplexer 66 selectively couples one of the sensors to A/D converter 68 such that a characteristic of the sensor (voltage for a thermocouple) is measured and communicated to controller 40 through isolator 56 and UART 64.
- Power for channel 42 is received from power module 38 through power isolator 70.
- Power isolator 70 is preferably a transformer, but can be any suitable device. Those skilled in the art will appreciate that communication isolator 56 and power isolator 70 cooperate to ensure that channel 42 is electrically isolated from the rest of device 16.
- Channel 44 is similar to channel 42, and like components are numbered similarly.
- Channel 44 can be configured to measure sensors of a different type than that of channel 42.
- channel 42 is configured to measure the voltage of thermocouples
- channel 44 is configured to measure the resistance of RTD's.
- Each sensor terminal in channel 44 is thus configured to couple to an RTD in a two, three, or four-wire (Kelvin) connection. Because channels 42 and 44 are each electrically isolated from the rest of device 16, coupling a first independently grounded sensor to channel 42, and a second independently grounded sensor to channel 44 does not result in the generation of undesirable ground loop errors.
- each channel can be configured for a specific type of sensor, which can be optimized for a specific application, parameters such as A/D precision and conversion rate can be tailored for the specific sensor type.
- a channel designed for high-precision may employ an A/D converter of configured to provide a very high accuracy having a relatively slower conversion time.
- a channel designed for sensors that measure a process variable that can changes quickly can employ a lower precision high speed A/D converter.
- any sensor input can be switched between operation with resistance-type sensors to operation with voltage-type sensors based upon configuration information received from controller 40.
- Controller 40 can provide the configuration information based upon information received over loop 14, or through a local input (not shown) .
- controller 40 can provide configuration information to the channels to adjust analog-to-digital sampling rates for each channel, or even for each sensor. This is particularly advantageous where sensor rates of change are anticipated based upon information known about the process.
- Channel 46 is similar to channels 42 and 44, however since channel 46 is configured to receive digital inputs, it does not include an analog-to- digital converter.
- inputs 1 - n are coupled to multiplexer 66 which conveys the signal of a selected input to bus 54 through communication isolator 60 and UART 64.
- the input level may be such that the digital inputs could be provided directly to UART 64 through isolator 60.
- Digital inputs are generally indicative of logic-type signals such as contact closure in limit switches as the like.
- digital inputs 1 - n can also be coupled to digital outputs of other process devices such that the inputs represent logic signals such as alarms or other Boolean type signals.
- Channel 48 is similar to channel 46, but essentially operates in reverse compared to channel 46.
- serial information sent to channel 48 through the UART is converted into parallel form, and conveyed across communication isolator 62 to set individual actuator outputs.
- logic signals are sent to the terminals labeled ACTUATOR 1-n to cause actuators coupled to such terminals (not shown) to engage or disengage as desired.
- actuators can be any suitable device such as valve controllers, heaters, motor controllers and any other suitable device. Essentially, any device that is addressable based upon a logic type output is an actuator.
- Fig. 3 is a system block diagram of a method of providing a process variable with a field-mounted process device in accordance with an embodiment of the present invention.
- the method begins at block 80 where a field-mountable process device is wholly powered by a two-wire process control loop.
- the process device is coupled to a first sensor through a first isolated input channel.
- a sensor signal is acquired through the first isolated input channel, which signal is indicative of a process variable.
- the process device is coupled to a second sensor through a second isolated input channel in order to acquire a second sensor signal. Since the first and second input channels are isolated, independent grounding of the first and second sensors will not cause undesirable ground loop errors.
- the process device computes a process variable based upon one or both of the sensor signals.
- the method is described with respect to two sensors, a number of additional sensors could be used such that the process variable would be a function of any number of sensor signals.
- the process device could average the values of the sensor, provide their difference, standard deviation, or any other appropriate function.
- the computed process device is output. Such output can be in the form of information sent over the process control loop, a local display, or a local output effected through an output channel.
- Fig. 4 is a system block diagram of a method of operating a field-mounted process device in accordance with an embodiment of the present invention.
- the device is wholly powered by the two-wire process control loop.
- the device receives an input. Such input can be in the form of signals received through input channels, such as the multiple isolated input channels described above, in the form of process information received through the two-wire process control loop, in the form of a local input, or any combination of input signals and information.
- the device executes user-programmable logic to relate the input information to one or more process outputs.
- the user- programmable logic can be simple or complex algorithms such as ladder logic, SFC's, fuzzy logic, Adaptive Control, or neural networks and the like.
- the device provides the output determined via operation of the user-programmable logic.
- the output can be a local output, either digital or analog, or the output can be sent as information over the two- wire process control loop.
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Programmable Controllers (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BRPI0110762-3A BR0110762B1 (en) | 2000-05-12 | 2001-05-08 | "FIELD MOUNTABLE BIFILAR PROCESSOR DEVICE". |
DE60143295T DE60143295D1 (en) | 2000-05-12 | 2001-05-08 | FIELD CONTROL UNIT WITH TWO BARRELS |
EP01933150A EP1290513B1 (en) | 2000-05-12 | 2001-05-08 | Two-wire field-mounted process device |
JP2001584975A JP2003533809A (en) | 2000-05-12 | 2001-05-08 | 2-wire on-site processable process equipment |
AU2001259597A AU2001259597A1 (en) | 2000-05-12 | 2001-05-08 | Two-wire field-mounted process device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/570,268 | 2000-05-12 | ||
US09/570,268 US6574515B1 (en) | 2000-05-12 | 2000-05-12 | Two-wire field-mounted process device |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001088644A2 true WO2001088644A2 (en) | 2001-11-22 |
WO2001088644A3 WO2001088644A3 (en) | 2002-05-23 |
Family
ID=24278930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/014719 WO2001088644A2 (en) | 2000-05-12 | 2001-05-08 | Two-wire field-mounted process device |
Country Status (9)
Country | Link |
---|---|
US (4) | US6574515B1 (en) |
EP (2) | EP1290513B1 (en) |
JP (1) | JP2003533809A (en) |
CN (2) | CN1217247C (en) |
AU (1) | AU2001259597A1 (en) |
BR (1) | BR0110762B1 (en) |
DE (1) | DE60143295D1 (en) |
SG (1) | SG128486A1 (en) |
WO (1) | WO2001088644A2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004048905A1 (en) * | 2002-11-22 | 2004-06-10 | Saab Marine Electronics Ab | Isolation circuit |
JP2005122744A (en) * | 2003-10-14 | 2005-05-12 | Rosemount Inc | Two-line processing device installed on work site |
US6956382B2 (en) | 2002-11-22 | 2005-10-18 | Saab Rosemount Tank Radar Ab | Isolation circuit |
EP2006753A1 (en) * | 2007-06-19 | 2008-12-24 | Schneider Electric Industries SAS | Module with isolated analogue inputs having low leakage current |
US20110010476A1 (en) * | 2009-07-09 | 2011-01-13 | Phoenix Contact Inc. | Two-wire loop process io transmitter powered from the two-wire loop |
WO2011037811A1 (en) * | 2009-09-22 | 2011-03-31 | Rosemount Inc. | Industrial process control transmitter with multiple sensors |
US8412471B2 (en) | 2008-01-31 | 2013-04-02 | Azbil Corporation | Measurement instrument |
DE102012111018A1 (en) | 2012-11-15 | 2014-05-15 | Systemplan GmbH | Multichannel measurement data acquisition device for microprocessor-controlled data recording, comprises input channels operatively connected to data storage unit, and power supply unit for providing input channels with supply voltages |
DE102014112729A1 (en) * | 2014-09-04 | 2016-03-10 | Oliver Sieke | Device for detecting and outputting measured values |
Families Citing this family (94)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0825506B1 (en) | 1996-08-20 | 2013-03-06 | Invensys Systems, Inc. | Methods and apparatus for remote process control |
US7089530B1 (en) | 1999-05-17 | 2006-08-08 | Invensys Systems, Inc. | Process control configuration system with connection validation and configuration |
AU5025600A (en) | 1999-05-17 | 2000-12-05 | Foxboro Company, The | Process control configuration system with parameterized objects |
US6788980B1 (en) * | 1999-06-11 | 2004-09-07 | Invensys Systems, Inc. | Methods and apparatus for control using control devices that provide a virtual machine environment and that communicate via an IP network |
US6574515B1 (en) | 2000-05-12 | 2003-06-03 | Rosemount Inc. | Two-wire field-mounted process device |
US7228186B2 (en) * | 2000-05-12 | 2007-06-05 | Rosemount Inc. | Field-mounted process device with programmable digital/analog interface |
US7844365B2 (en) * | 2000-05-12 | 2010-11-30 | Rosemount Inc. | Field-mounted process device |
US6567708B1 (en) * | 2000-07-25 | 2003-05-20 | Gentex Corporation | System to interconnect, link, and control variable transmission windows and variable transmission window constructions |
US6708239B1 (en) * | 2000-12-08 | 2004-03-16 | The Boeing Company | Network device interface for digitally interfacing data channels to a controller via a network |
EP1358523A2 (en) * | 2001-01-30 | 2003-11-05 | Endress + Hauser Process Solutions AG | Method for maintaining and managing a manufacturing facility |
DE10216332A1 (en) * | 2002-04-13 | 2003-10-30 | Conducta Endress & Hauser | Measuring device for process technology and operating procedures for a measuring device |
US6975914B2 (en) | 2002-04-15 | 2005-12-13 | Invensys Systems, Inc. | Methods and apparatus for process, factory-floor, environmental, computer aided manufacturing-based or other control system with unified messaging interface |
US6809579B2 (en) * | 2003-03-06 | 2004-10-26 | Hewlett-Packard Development Company, L.P. | Blocking mechanism to reduce leakage current |
US6904476B2 (en) * | 2003-04-04 | 2005-06-07 | Rosemount Inc. | Transmitter with dual protocol interface |
WO2005017288A2 (en) * | 2003-08-13 | 2005-02-24 | Engineered Support Systems, Inc. | Apparatus for monitoring and controlling an isolation shelter and providing diagnostic and prognostic information |
DE10344263A1 (en) * | 2003-09-23 | 2005-05-12 | Conducta Endress & Hauser | Method for secure data transmission between an intrinsically safe sensor and a non-intrinsically safe evaluation unit |
US20050099163A1 (en) * | 2003-11-08 | 2005-05-12 | Andigilog, Inc. | Temperature manager |
CN100538569C (en) * | 2004-02-28 | 2009-09-09 | Abb研究有限公司 | The method of Process Control System and this system of operation |
US7761923B2 (en) | 2004-03-01 | 2010-07-20 | Invensys Systems, Inc. | Process control methods and apparatus for intrusion detection, protection and network hardening |
DE602005018749D1 (en) * | 2004-03-02 | 2010-02-25 | Rosemount Inc | |
US6971626B2 (en) * | 2004-03-08 | 2005-12-06 | Fisher Controls International Llc. | Independent intelligent limit switch |
US8538560B2 (en) * | 2004-04-29 | 2013-09-17 | Rosemount Inc. | Wireless power and communication unit for process field devices |
US8145180B2 (en) | 2004-05-21 | 2012-03-27 | Rosemount Inc. | Power generation for process devices |
JP2005339424A (en) * | 2004-05-31 | 2005-12-08 | Yokogawa Electric Corp | Signal transmission device |
US8787848B2 (en) * | 2004-06-28 | 2014-07-22 | Rosemount Inc. | RF adapter for field device with low voltage intrinsic safety clamping |
US8160535B2 (en) * | 2004-06-28 | 2012-04-17 | Rosemount Inc. | RF adapter for field device |
US7262693B2 (en) * | 2004-06-28 | 2007-08-28 | Rosemount Inc. | Process field device with radio frequency communication |
CA2578490A1 (en) * | 2004-08-31 | 2006-03-09 | Watlow Electric Manufacturing Company | Operations system distributed diagnostic system |
US7312716B2 (en) * | 2004-10-05 | 2007-12-25 | Azonix | Wireless communication using an intrinsically safe design for use in a hazardous area |
JP4792851B2 (en) * | 2004-11-01 | 2011-10-12 | 横河電機株式会社 | Field equipment |
US7680460B2 (en) * | 2005-01-03 | 2010-03-16 | Rosemount Inc. | Wireless process field device diagnostics |
US9184364B2 (en) * | 2005-03-02 | 2015-11-10 | Rosemount Inc. | Pipeline thermoelectric generator assembly |
EP1883916B1 (en) * | 2005-05-27 | 2015-01-28 | Rosemount, Inc. | Method of selecting data communication provider in a field device |
US7208735B2 (en) * | 2005-06-08 | 2007-04-24 | Rosemount, Inc. | Process field device with infrared sensors |
JP4676000B2 (en) | 2005-06-27 | 2011-04-27 | ローズマウント インコーポレイテッド | Field device with dynamically adjustable power consumption radio frequency communication |
US7835295B2 (en) * | 2005-07-19 | 2010-11-16 | Rosemount Inc. | Interface module with power over Ethernet function |
RU2427019C2 (en) * | 2005-07-20 | 2011-08-20 | Роузмаунт Инк. | Operational device electrically powered through ethernet |
US20060240772A1 (en) * | 2005-11-01 | 2006-10-26 | Danny Schoening | Locator device with sensor based power management |
CN101371109B (en) * | 2006-01-18 | 2012-05-09 | 罗斯蒙德公司 | Wet gas indication using a process fluid differential pressure transmitter |
US7367712B2 (en) * | 2006-02-06 | 2008-05-06 | National Instruments Corporation | RTD measurement unit including detection mechanism for automatic selection of 3-wire or 4-wire RTD measurement mode |
WO2007095216A2 (en) * | 2006-02-15 | 2007-08-23 | Rosemount Inc. | Multiphasic overreading correction in a process variable transmitter |
US7454553B2 (en) * | 2006-03-29 | 2008-11-18 | Rosemount Inc. | Power transfer field device |
US7860857B2 (en) | 2006-03-30 | 2010-12-28 | Invensys Systems, Inc. | Digital data processing apparatus and methods for improving plant performance |
JP4817117B2 (en) * | 2006-04-25 | 2011-11-16 | 横河電機株式会社 | Measuring system |
US7913566B2 (en) * | 2006-05-23 | 2011-03-29 | Rosemount Inc. | Industrial process device utilizing magnetic induction |
US8188359B2 (en) * | 2006-09-28 | 2012-05-29 | Rosemount Inc. | Thermoelectric generator assembly for field process devices |
US8761196B2 (en) * | 2006-09-29 | 2014-06-24 | Fisher-Rosemount Systems, Inc. | Flexible input/output devices for use in process control systems |
US7658539B2 (en) * | 2006-12-04 | 2010-02-09 | Rosemount Inc. | Temperature sensor configuration detection in process variable transmitter |
DE102006060447A1 (en) * | 2006-12-19 | 2008-06-26 | Endress + Hauser Wetzer Gmbh + Co. Kg | Two-wire field device for process automation technology for connecting at least one sensor element |
US8838856B2 (en) * | 2007-02-16 | 2014-09-16 | Emulex Corporation | Virtual universal asynchronous receiver transmitter for server systems |
US7991931B2 (en) * | 2007-05-02 | 2011-08-02 | Siemens Industry, Inc. | Data transport architecture |
DE102007021099A1 (en) | 2007-05-03 | 2008-11-13 | Endress + Hauser (Deutschland) Ag + Co. Kg | Method for commissioning and / or reconfiguring a programmable field meter |
EP2165419B1 (en) | 2007-06-26 | 2018-01-03 | Pepperl + Fuchs GmbH | Power management circuit for a wireless communication device and process control system using same |
WO2009003146A1 (en) * | 2007-06-26 | 2008-12-31 | Mactek Corporation | Pass-through connection systems and methods for process control field devices |
DE102007039529A1 (en) * | 2007-08-21 | 2009-02-26 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Method for operating a field device of the process automation technology with at least two measuring channels and field device of the process automation technology with at least two measuring channels, which is suitable for carrying out the method |
US20090088874A1 (en) * | 2007-10-02 | 2009-04-02 | Emmanuel Arceo | Valve manifold assemblies and method of operating valve manifold assemblies |
DE102007058608A1 (en) | 2007-12-04 | 2009-06-10 | Endress + Hauser Flowtec Ag | Electric device |
US8250924B2 (en) | 2008-04-22 | 2012-08-28 | Rosemount Inc. | Industrial process device utilizing piezoelectric transducer |
DE102008022373A1 (en) | 2008-05-06 | 2009-11-12 | Endress + Hauser Flowtec Ag | Measuring device and method for monitoring a measuring device |
US7535614B1 (en) | 2008-05-27 | 2009-05-19 | Gentex Corporation | Electrical window control system and method thereof |
US8049361B2 (en) | 2008-06-17 | 2011-11-01 | Rosemount Inc. | RF adapter for field device with loop current bypass |
EP2310918B1 (en) | 2008-06-17 | 2014-10-08 | Rosemount, Inc. | Rf adapter for field device with variable voltage drop |
US8929948B2 (en) | 2008-06-17 | 2015-01-06 | Rosemount Inc. | Wireless communication adapter for field devices |
US8694060B2 (en) | 2008-06-17 | 2014-04-08 | Rosemount Inc. | Form factor and electromagnetic interference protection for process device wireless adapters |
CN104407518B (en) | 2008-06-20 | 2017-05-31 | 因文西斯系统公司 | The system and method interacted to the reality and Simulation Facility for process control |
JP4979658B2 (en) * | 2008-08-28 | 2012-07-18 | 株式会社 エニイワイヤ | Transport control system and transport control method |
DE102008053920A1 (en) * | 2008-10-30 | 2010-05-06 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Distribution module or measuring system formed thereby |
US7977924B2 (en) | 2008-11-03 | 2011-07-12 | Rosemount Inc. | Industrial process power scavenging device and method of deriving process device power from an industrial process |
US8127060B2 (en) | 2009-05-29 | 2012-02-28 | Invensys Systems, Inc | Methods and apparatus for control configuration with control objects that are fieldbus protocol-aware |
US8463964B2 (en) | 2009-05-29 | 2013-06-11 | Invensys Systems, Inc. | Methods and apparatus for control configuration with enhanced change-tracking |
US8626087B2 (en) | 2009-06-16 | 2014-01-07 | Rosemount Inc. | Wire harness for field devices used in a hazardous locations |
US9674976B2 (en) | 2009-06-16 | 2017-06-06 | Rosemount Inc. | Wireless process communication adapter with improved encapsulation |
DE102009029495A1 (en) * | 2009-09-16 | 2011-03-24 | Endress + Hauser Conducta Gesellschaft für Mess- und Regeltechnik mbH + Co. KG | Transmitter for a multi-sensor system, in particular as field device for process automation technology and method for operating the transmitter |
JP5409275B2 (en) * | 2009-11-06 | 2014-02-05 | アズビル株式会社 | Supervisory control system |
DE102010007953A1 (en) * | 2010-02-12 | 2011-08-18 | Phoenix Contact GmbH & Co. KG, 32825 | Switching logic module |
US9860093B2 (en) | 2010-03-18 | 2018-01-02 | Pepper+Fuchs Gmbh | Frequency shift keying modulation and demodulation |
WO2011119892A1 (en) | 2010-03-24 | 2011-09-29 | Mark Sinreich | Power management circuit for a wireless communication device and process control system using same |
EP2561603B1 (en) | 2010-04-19 | 2019-09-04 | Endress+Hauser Flowtec AG | Driver circuit for a measuring transducer and measuring system designed having same |
DE202010006553U1 (en) | 2010-05-06 | 2011-10-05 | Endress + Hauser Flowtec Ag | Electronic measuring device with an optocoupler |
US8864378B2 (en) | 2010-06-07 | 2014-10-21 | Rosemount Inc. | Process variable transmitter with thermocouple polarity detection |
DE102010030924A1 (en) | 2010-06-21 | 2011-12-22 | Endress + Hauser Flowtec Ag | Electronics housing for an electronic device or device formed therewith |
US10761524B2 (en) | 2010-08-12 | 2020-09-01 | Rosemount Inc. | Wireless adapter with process diagnostics |
EP2423771B1 (en) * | 2010-08-23 | 2016-12-28 | Siemens Aktiengesellschaft | Analogue input component for a programmable logic controller |
US8315058B2 (en) * | 2010-09-14 | 2012-11-20 | Rosemount Inc. | Capacitive touch interface assembly |
EP2457444B1 (en) * | 2010-11-29 | 2018-04-25 | Albert Handtmann Maschinenfabrik GmbH & Co. KG | Scalable machine and method for its operation |
DE102011076838A1 (en) | 2011-05-31 | 2012-12-06 | Endress + Hauser Flowtec Ag | Meter electronics for a meter device and meter device formed thereby |
US9310794B2 (en) | 2011-10-27 | 2016-04-12 | Rosemount Inc. | Power supply for industrial process field device |
US9316543B2 (en) | 2013-03-14 | 2016-04-19 | Rosemount Inc. | Temperature transmitter transient protector |
CA2903695A1 (en) * | 2013-03-14 | 2014-10-02 | Rosemount Inc. | Communications unit for an industrial process network |
US10783030B2 (en) * | 2014-03-12 | 2020-09-22 | Sensia Llc | Network synchronization for master and slave devices |
JP2017535189A (en) * | 2014-10-15 | 2017-11-24 | フェニックス コンタクト ディベロップメント アンド マニュファクチャリング、インコーポレイテッド | Spur insulation in fieldbus networks |
DE102016114860A1 (en) | 2016-08-10 | 2018-02-15 | Endress + Hauser Flowtec Ag | Driver circuit and thus formed converter electronics or thus formed measuring system |
US11159203B2 (en) | 2019-09-13 | 2021-10-26 | Micro Motion, Inc. | Process control loop bridge |
DE102022119145A1 (en) | 2022-07-29 | 2024-02-01 | Endress+Hauser Flowtec Ag | Connection circuit for a field device and field device |
Family Cites Families (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL7106855A (en) * | 1971-05-19 | 1972-11-21 | ||
US3872389A (en) * | 1974-02-12 | 1975-03-18 | Westinghouse Electric Corp | Signal processor |
JPS52108194A (en) | 1976-03-09 | 1977-09-10 | Takeda Riken Ind Co Ltd | Multiple input temperature measuring instrument |
US4122719A (en) | 1977-07-08 | 1978-10-31 | Environmental Systems Corporation | System for accurate measurement of temperature |
US4206443A (en) * | 1978-02-17 | 1980-06-03 | Westinghouse Electric Corp. | Protective load disconnect unit for remote load control systems |
US4243931A (en) | 1979-03-28 | 1981-01-06 | Rosemount Inc. | Current isolator |
US4413314A (en) * | 1980-06-16 | 1983-11-01 | Forney Engineering Company | Industrial process control system |
US4356475A (en) * | 1980-09-12 | 1982-10-26 | Siemens Aktiengesellschaft | System containing a predetermined number of monitoring devices and at least one central station |
US4484190A (en) * | 1981-05-26 | 1984-11-20 | General Electric Company | System for load output level control |
US4678937A (en) | 1984-02-03 | 1987-07-07 | Rosemount Engineering Company Limited | Electrical isolation circuit |
US4910658A (en) * | 1985-09-04 | 1990-03-20 | Eaton Leonard Technologies, Inc. | Real time process controller with serial I/O bus |
US4739193A (en) * | 1986-10-30 | 1988-04-19 | Rca Corporation | Drive circuit with limited signal transition rate for RFI reduction |
US4816825A (en) * | 1987-02-27 | 1989-03-28 | Zenith Electronics Corporation | Method and apparatus for power level control in area networks |
US4818994A (en) * | 1987-10-22 | 1989-04-04 | Rosemount Inc. | Transmitter with internal serial bus |
CA1338459C (en) * | 1987-10-27 | 1996-07-16 | Toshiaki Tokizane | Remote supervisory and controlling system |
US5223826A (en) * | 1988-08-26 | 1993-06-29 | Nakamura Kiki Engineering Co., Ltd. | Control/supervisory signal transmission system |
FR2637107B1 (en) * | 1988-09-26 | 1994-05-13 | Alcatel Cit | SYSTEM FOR COLLECTING ALARMS FROM A SET OF STATIONS |
US4936690A (en) | 1989-05-31 | 1990-06-26 | Rosemount Inc. | Thermocouple transmitter with cold junction compensation |
WO1991005293A1 (en) | 1989-10-02 | 1991-04-18 | Rosemount Inc. | Field-mounted control unit |
GB9006661D0 (en) * | 1990-03-24 | 1990-05-23 | Reflex Manufacturing Systems L | Network-field interface for manufacturing systems |
US5318065A (en) * | 1992-11-20 | 1994-06-07 | Ransburg Corporation | Color valve multiplexer |
CA2169721A1 (en) | 1993-09-07 | 1995-03-16 | David A. Broden | Multivariable transmitter |
JP3077076B2 (en) * | 1993-12-09 | 2000-08-14 | 株式会社山武 | Multi-point input 2-wire transmitter |
DE4403961C2 (en) | 1994-02-04 | 1997-07-03 | Hartmann & Braun Ag | Feeding system for an intrinsically safe fieldbus |
US5551053A (en) | 1994-02-28 | 1996-08-27 | Eaton Corporation | System and Method for assigning addresses to I/O devices in a control network and for verifying the assigned address of the devices |
US5706007A (en) * | 1995-01-03 | 1998-01-06 | Smar Research Corporation | Analog current / digital bus protocol converter circuit |
US5737543A (en) * | 1995-02-23 | 1998-04-07 | International Business Machines Corporation | High performance communications path |
DE19512372A1 (en) * | 1995-04-01 | 1996-10-10 | Abb Patent Gmbh | Device for intrinsically safe signal adaptation |
US5650777A (en) * | 1995-06-07 | 1997-07-22 | Rosemount Inc. | Conversion circuit for process control system |
US5700090A (en) | 1996-01-03 | 1997-12-23 | Rosemount Inc. | Temperature sensor transmitter with sensor sheath lead |
US6094600A (en) * | 1996-02-06 | 2000-07-25 | Fisher-Rosemount Systems, Inc. | System and method for managing a transaction database of records of changes to field device configurations |
US5764891A (en) * | 1996-02-15 | 1998-06-09 | Rosemount Inc. | Process I/O to fieldbus interface circuit |
US5713668A (en) | 1996-08-23 | 1998-02-03 | Accutru International Corporation | Self-verifying temperature sensor |
US5936514A (en) * | 1996-09-27 | 1999-08-10 | Rosemount Inc. | Power supply input circuit for field instrument |
US5970430A (en) * | 1996-10-04 | 1999-10-19 | Fisher Controls International, Inc. | Local device and process diagnostics in a process control network having distributed control functions |
BR9712194A (en) * | 1996-10-04 | 1999-08-31 | Fisher Controls Int | Interface between a communications network and a process control system, software program that implements an interface between a communications network and a process control system to run on a processor, manufacturing article implementing a software program interface between a communications network and a process control system to run on a processor; and, an interface adapted to be coupled between a remote communications network and a process control system. |
CN1244033C (en) * | 1996-10-04 | 2006-03-01 | 费希尔控制产品国际有限公司 | Process control network with redundant field devices and busses |
US6047222A (en) * | 1996-10-04 | 2000-04-04 | Fisher Controls International, Inc. | Process control network with redundant field devices and buses |
CA2267528C (en) * | 1996-10-04 | 2006-04-04 | Fisher Controls International, Inc. | Maintenance interface device for use in a process control network |
US5980078A (en) * | 1997-02-14 | 1999-11-09 | Fisher-Rosemount Systems, Inc. | Process control system including automatic sensing and automatic configuration of devices |
JPH10261185A (en) | 1997-03-19 | 1998-09-29 | Hitachi Ltd | Input/output coexisting type signal converter |
JP3340358B2 (en) | 1997-09-08 | 2002-11-05 | 株式会社東芝 | Programmable controller |
US6014612A (en) * | 1997-10-02 | 2000-01-11 | Fisher Controls International, Inc. | Remote diagnostics in a process control network having distributed control functions |
US6055633A (en) * | 1997-10-28 | 2000-04-25 | Honeywell Inc. | Method of reprogramming memories in field devices over a multidrop network |
US6088665A (en) * | 1997-11-03 | 2000-07-11 | Fisher Controls International, Inc. | Schematic generator for use in a process control network having distributed control functions |
DE29720492U1 (en) | 1997-11-19 | 1998-02-12 | Delta Plus Elektronik Gmbh | Control arrangement with separate multiplexer |
US6104875A (en) * | 1997-12-18 | 2000-08-15 | Honeywell Inc. | Method for field programming an industrial process transmitter |
US6016523A (en) | 1998-03-09 | 2000-01-18 | Schneider Automation, Inc. | I/O modular terminal having a plurality of data registers and an identification register and providing for interfacing between field devices and a field master |
US6035240A (en) | 1998-11-12 | 2000-03-07 | Moorehead; Jack | Flexible distributed processing system for sensor data acquisition and control |
US6813525B2 (en) * | 2000-02-25 | 2004-11-02 | Square D Company | Energy management system |
US7844365B2 (en) * | 2000-05-12 | 2010-11-30 | Rosemount Inc. | Field-mounted process device |
US6574515B1 (en) | 2000-05-12 | 2003-06-03 | Rosemount Inc. | Two-wire field-mounted process device |
US7016741B2 (en) * | 2003-10-14 | 2006-03-21 | Rosemount Inc. | Process control loop signal converter |
-
2000
- 2000-05-12 US US09/570,268 patent/US6574515B1/en not_active Expired - Lifetime
-
2001
- 2001-05-08 JP JP2001584975A patent/JP2003533809A/en active Pending
- 2001-05-08 AU AU2001259597A patent/AU2001259597A1/en not_active Abandoned
- 2001-05-08 EP EP01933150A patent/EP1290513B1/en not_active Revoked
- 2001-05-08 DE DE60143295T patent/DE60143295D1/en not_active Expired - Lifetime
- 2001-05-08 WO PCT/US2001/014719 patent/WO2001088644A2/en active Application Filing
- 2001-05-08 EP EP10007853A patent/EP2251754A1/en not_active Ceased
- 2001-05-08 BR BRPI0110762-3A patent/BR0110762B1/en active IP Right Grant
- 2001-05-08 SG SG200502950A patent/SG128486A1/en unknown
- 2001-05-08 CN CN01809359.0A patent/CN1217247C/en not_active Expired - Fee Related
- 2001-05-08 CN CNB2005100728128A patent/CN100381958C/en not_active Expired - Fee Related
-
2003
- 2003-03-26 US US10/400,148 patent/US6711446B2/en not_active Expired - Lifetime
-
2004
- 2004-01-20 US US10/760,793 patent/US6961624B2/en not_active Expired - Lifetime
-
2005
- 2005-08-23 US US11/210,246 patent/US20060161271A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
None |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6956382B2 (en) | 2002-11-22 | 2005-10-18 | Saab Rosemount Tank Radar Ab | Isolation circuit |
WO2004048905A1 (en) * | 2002-11-22 | 2004-06-10 | Saab Marine Electronics Ab | Isolation circuit |
JP2005122744A (en) * | 2003-10-14 | 2005-05-12 | Rosemount Inc | Two-line processing device installed on work site |
EP2006753A1 (en) * | 2007-06-19 | 2008-12-24 | Schneider Electric Industries SAS | Module with isolated analogue inputs having low leakage current |
FR2917851A1 (en) * | 2007-06-19 | 2008-12-26 | Schneider Electric Ind Sas | ISOLATED ANALOGUE INPUT MODULE WITH LOW LEAKAGE CURRENT. |
US7996587B2 (en) | 2007-06-19 | 2011-08-09 | Schneider Electric Industries Sas | Module with isolated analogue inputs having low leakage current |
US8412471B2 (en) | 2008-01-31 | 2013-04-02 | Azbil Corporation | Measurement instrument |
US20110010476A1 (en) * | 2009-07-09 | 2011-01-13 | Phoenix Contact Inc. | Two-wire loop process io transmitter powered from the two-wire loop |
US8180948B2 (en) * | 2009-07-09 | 2012-05-15 | Phoenix Contact America, Inc. | Two-wire loop process IO transmitter powered from the two-wire loop |
DE112010002852B4 (en) * | 2009-07-09 | 2014-08-14 | Phoenix Contact Gmbh & Co. Kg | Two-wire current I / O process transmitter powered by the two-wire current loop |
WO2011037811A1 (en) * | 2009-09-22 | 2011-03-31 | Rosemount Inc. | Industrial process control transmitter with multiple sensors |
US8311778B2 (en) | 2009-09-22 | 2012-11-13 | Rosemount Inc. | Industrial process control transmitter with multiple sensors |
DE102012111018A1 (en) | 2012-11-15 | 2014-05-15 | Systemplan GmbH | Multichannel measurement data acquisition device for microprocessor-controlled data recording, comprises input channels operatively connected to data storage unit, and power supply unit for providing input channels with supply voltages |
DE102014112729A1 (en) * | 2014-09-04 | 2016-03-10 | Oliver Sieke | Device for detecting and outputting measured values |
Also Published As
Publication number | Publication date |
---|---|
CN1677291A (en) | 2005-10-05 |
BR0110762B1 (en) | 2014-07-08 |
AU2001259597A1 (en) | 2001-11-26 |
DE60143295D1 (en) | 2010-12-02 |
US6961624B2 (en) | 2005-11-01 |
BR0110762A (en) | 2003-05-06 |
US6711446B2 (en) | 2004-03-23 |
US20040158334A1 (en) | 2004-08-12 |
SG128486A1 (en) | 2007-01-30 |
CN1217247C (en) | 2005-08-31 |
EP2251754A1 (en) | 2010-11-17 |
EP1290513A2 (en) | 2003-03-12 |
WO2001088644A3 (en) | 2002-05-23 |
US6574515B1 (en) | 2003-06-03 |
US20030181996A1 (en) | 2003-09-25 |
JP2003533809A (en) | 2003-11-11 |
CN100381958C (en) | 2008-04-16 |
US20060161271A1 (en) | 2006-07-20 |
EP1290513B1 (en) | 2010-10-20 |
CN1429354A (en) | 2003-07-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US6574515B1 (en) | Two-wire field-mounted process device | |
US7844365B2 (en) | Field-mounted process device | |
US7016741B2 (en) | Process control loop signal converter | |
EP1721224B1 (en) | Field-mounted process device with programmable digital/analog interface | |
US7228186B2 (en) | Field-mounted process device with programmable digital/analog interface | |
EP2480939B1 (en) | Industrial process control transmitter with multiple sensors | |
US8806085B2 (en) | Application specific integrated circuit (ASIC) disposed in input/output module connectable to programmable logic controller (PLC) based systems having plurality of connection paths | |
CN113966493A (en) | Automated field device | |
KR200325286Y1 (en) | Analogue transmitter module | |
ASY | 4 Application-specific modules and solutions |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
AK | Designated states |
Kind code of ref document: A3 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
REEP | Request for entry into the european phase |
Ref document number: 2001933150 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2001933150 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: IN/PCT/2002/1839/CHE Country of ref document: IN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 018093590 Country of ref document: CN |
|
WWP | Wipo information: published in national office |
Ref document number: 2001933150 Country of ref document: EP |