WO2012000996A2 - Procédé et dispositif pour faire fonctionner des appareils de terrain, notamment des appareils de terrain hart en mode de fonctionnement multipoint - Google Patents

Procédé et dispositif pour faire fonctionner des appareils de terrain, notamment des appareils de terrain hart en mode de fonctionnement multipoint Download PDF

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Publication number
WO2012000996A2
WO2012000996A2 PCT/EP2011/060822 EP2011060822W WO2012000996A2 WO 2012000996 A2 WO2012000996 A2 WO 2012000996A2 EP 2011060822 W EP2011060822 W EP 2011060822W WO 2012000996 A2 WO2012000996 A2 WO 2012000996A2
Authority
WO
WIPO (PCT)
Prior art keywords
field device
field
field devices
starter circuit
power supply
Prior art date
Application number
PCT/EP2011/060822
Other languages
German (de)
English (en)
Other versions
WO2012000996A3 (fr
Inventor
Marc Fiedler
Original Assignee
Endress+Hauser Process Solutions Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Endress+Hauser Process Solutions Ag filed Critical Endress+Hauser Process Solutions Ag
Publication of WO2012000996A2 publication Critical patent/WO2012000996A2/fr
Publication of WO2012000996A3 publication Critical patent/WO2012000996A3/fr

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Classifications

    • 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
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/41845—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by system universality, reconfigurability, modularity
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/06—Two-wire systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/10—Current supply arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40006—Architecture of a communication node
    • H04L12/40045—Details regarding the feeding of energy to the node from the 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
    • G05B2219/30—Nc systems
    • G05B2219/32—Operator till task planning
    • G05B2219/32021—Energy management, balance and limit power to tools
    • 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
    • G05B2219/30—Nc systems
    • G05B2219/34—Director, elements to supervisory
    • G05B2219/34316—Install nc system, check voltages, power supply with incorporated a-d
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to a device for commissioning of field devices, which device can be connected to a power supply, wherein the power supply serves to the field devices with
  • the invention relates to the use of such a device.
  • the invention relates to a method for commissioning field devices, wherein the field devices to a power supply
  • Power supply to be supplied with electrical energy.
  • field devices are often used to detect and / or influence process variables.
  • a variety of such field devices is manufactured and sold by the company Endress + Hauser.
  • field devices in modern manufacturing plants via fieldbus systems (HART, Profibus, etc.) with higher-level units, e.g. Control systems or control units connected.
  • the digital communication between the field devices can be done, for example, by means of the HART protocol.
  • Field devices that support the HART protocol in short HART field devices, can be operated in multidrop operating mode.
  • the field devices are connected in parallel and communicate with the help of a communication resistor, which in series with the
  • Field devices that can be connected to a voltage source, be limited. The same applies to field devices and systems designed according to the Foundation Fieldbus standard.
  • the invention is therefore based on the object, a start of several
  • Field devices which are supplied together by a, in particular ström limited, power supply with electrical energy to
  • the object is achieved by a device, the use of the device and a method.
  • the object is achieved in that the
  • Device comprises at least one starter circuit, which
  • Starter circuit serves to at least one according to a
  • Power supply may in particular also be a
  • the substantially constant electrical current can be provided which the field devices, in particular the preceding field device, receive in the specific operating mode.
  • the field devices can be connected to a single power supply and supplied by this power supply with electrical energy.
  • the order of the field devices can be specified by the order in which the field devices are connected to the device, for example, viewed from the power supply.
  • the field device following the predetermined sequence on a preceding field device can then be disconnected from the power supply at least until the preceding field device receives a substantially constant current.
  • the recorded substantially constant electric current can, for example, to maintain certain functionalities, such as the detection of measured values, etc., of the field devices, in particular of the preceding
  • Field device serve.
  • all field devices connected to the device which have a specific operating mode with a substantially constant current consumption, can thus be transferred one after the other into this operating mode.
  • After the preceding, in particular immediately preceding, field device or all preceding field devices operate in the operating mode and thus each have a substantially constant for operating in the
  • the subsequent field device can be started after all previous field devices, in particular the preceding field device has a substantially constant current consumption, and, for example, also in the
  • the field devices can be started in this way successively or not simultaneously and thereby the commissioning of several field devices, especially in a ström limited power supply, done.
  • the field devices in particular by means of the starter circuit, parallel to one another
  • Supply line can be connected, which supply line is used to supply the field devices with a required for receiving the substantially constant current operating voltage.
  • the order of the field devices can also be determined by the order in which the field devices are connected to the
  • Supply line which is, for example, a two-wire current loop connected are specified.
  • the order of the field devices according to the order in which the field devices, for example. From the
  • the field devices can be connected in parallel to a provided for this purpose supply line.
  • this supply line can be extended, i. to be continued.
  • the field devices can be connected in parallel to the supply line by means of the device and / or the starter circuit to which the field devices are connected, the field devices.
  • a fieldbus system for example, in a tree structure, via which the field devices are not only supplied with energy, but also
  • the starter circuit separates the at least one following field device, in particular after switching on the previous field device by means of the starter circuit, for a
  • the following field device can be connected to the power supply.
  • the following field device may also be started after it is also connected to the power supply, i. be put into operation.
  • the starter circuit disconnects the at least one following field device from the power supply at least as long, in particular as long, until the preceding field device receives a substantially constant current serving for the particular operating mode of the preceding field device.
  • the starter circuit disconnects the at least one following field device from the power supply until the preceding field device receives a substantially constant current serving for the particular operating mode of the preceding field device which exceeds or falls below a predetermined threshold value.
  • the field device following the preceding field device can remain disconnected from the power supply until the current that can be provided by the power supply is sufficient to operate the previous field device on the one hand and to start, ie turn on, the next field device on the other hand.
  • the device or the starter circuit can be designed by means of corresponding threshold values, up to their over- or
  • the thresholds may be current values that are determined by a corresponding circuit with the current consumption of the
  • the field devices are connected via a two-wire fieldbus system, in particular via a HART fieldbus system.
  • Fieldbus system can be about the device, in particular the
  • Starter circuit and / or preferably via the same supply line (s), which also serve to power the field devices.
  • communication takes place via the two-wire fieldbus system via digital signals.
  • the digital signals on the substantially
  • previous field device preferably to a HART field device, which has a multidrop operating mode.
  • the field devices are HART field devices which have a multidrop operating mode, and the particular operating mode is the multidrop operating mode.
  • the starter circuit separates the at least one following field device at least as long from the
  • the starter circuit comprises a switch which serves to separate the at least one following field device from the power supply.
  • the starter circuit is part of one of the field devices, in particular the first of the field devices.
  • the device and / or the starter circuit is carried out separately from the field devices, in particular accommodated in a separate housing. In this case, you can
  • connection between the field burrs can also be connected by successively connected in parallel to the supply line
  • Starter circuits are carried out, wherein, for example, a field device can be connected to each starter circuit.
  • the starter circuit has two input-side terminals, which are for connecting the
  • the input-side terminals can be used to connect the device via the connecting line with the
  • Connections of the device or the starter circuit also serve to connect the starter circuit with the previous field device and / or a previous, especially identical, starter circuit.
  • the starter circuit comprises two supply terminals, wherein the supply terminals are used for connecting the at least one preceding field device.
  • the starter circuit has two output-side terminals, via which the field device following the predefined sequence and / or a further starter circuit can be connected to the preceding field device. Both On the input side and / or output side terminals and / or in the supply connections may be, for example, to terminals.
  • the starter circuit has a measuring device, which serves the current consumption over the
  • Input side terminals the output side terminals and / or to determine the supply terminals of the starter circuit.
  • the measuring device is used to determine the current consumption of the last field device started.
  • At least one transmitter is provided, which serves to control the switch, which serves to separate the following field device from the power supply.
  • control of the switch is effected by the evaluation electronics as a function of the current consumption, in particular by means of the measuring device, via the input and / or output side connections and / or the supply connections.
  • the evaluation electronics By means of the evaluation of the switch can be closed so that the output side terminals a voltage can be tapped or the switch can be opened so that between the
  • the object is achieved by the use of the device and / or starter circuit according to one of the preceding claims for initialization, in particular for startup, a particular operating mode of a field device, in particular a multidrop operating mode of a HART field device.
  • the object is achieved in that at least one according to a predetermined order of the field devices to a previous field device following the field device at least as long the power supply is disconnected until the previous field device receives a substantially constant current for a particular operating mode of the preceding field device.
  • the field devices in particular by means of a starter circuit, parallel to one another
  • Supply line connected, via which supply line the field devices are connected to the power supply.
  • the field devices are put into operation in accordance with the predetermined sequence.
  • the subsequent field device is disconnected from the power supply as long as possible, in particular just as long, until the preceding field device receives a substantially constant current which operates to operate the preceding field device in a specific operating mode, in particular multidrop operation.
  • the current consumption of the preceding field device and / or at least part of the field devices is determined.
  • a switch by means of which the following field device is disconnected from the supply voltage, is activated as a function of the determined current consumption.
  • the invention is based on the principle of staggered starting of
  • Connected field devices sequentially starts until each of the currently started field device has switched to the specific operating mode and operates with a substantially constant current consumption. Then the next field device is started. If all connected field devices are in the intended operating mode, the field device bus can be scanned by command or automatically and all connected field devices can be detected. The field devices can then data with each other or with a higher-level control system or a corresponding
  • FIG. 1 shows a schematic representation of a first embodiment of the
  • FIG. 2 shows a schematic representation of a second embodiment of the invention
  • FIG. 3 shows an example of the time course of the current consumption of a
  • Fig. 4 a schematic representation of the invention in a third
  • FIG. 1 shows a first embodiment of the invention.
  • HART field devices usually need a higher current for a certain time after being switched on than, for example, 4 mA (inrush current l (t), cf. FIG. 3). It can therefore at least one starter circuit S4, S5, S6 provided be that a supply terminal V1, V2, V3 for one of the field devices F2, F3, F4 only after a fixed time, which is greater than the start time of a previously started field device F1, F2, F3, connects to the power supply. For example.
  • the third field device F3 first supplied with the supply voltage and is therefore started after the time required for the second field device F2 to start, ie after the start time has elapsed.
  • the fourth field device F4 is first supplied with the supply voltage and thus started after the start time of the third field device F3 has elapsed.
  • a, in particular switchable and current-limited 4..20 mA, voltage source PS is connected via a two-wire line 2L to the proposed device, a so-called starter box SB.
  • the two-wire current loop 2L is connected to the input-side terminals E of the starter box SB.
  • a first, second and third starter circuit S4, S5, S6 are integrated into the starter box SB and via the
  • Supply connections V1, V2, V3 can be contacted. About one
  • Supply connection V4 is the first field device F1 connected to the starter box.
  • the first field device F1 is in the embodiment of Figure 1 via the supply terminals V4 directly to the input sides
  • the second field device F2, the third field device F3 and the fourth field device F4, however, are in each case via at least one starter circuit S4, S5, S6 with the input side
  • the field devices F1, F2, F3, F4 are thus connected to the voltage source PS via the starter box SB or can be connected via the starter circuits S4, S5, S6. In this case, the field devices F1, F2, F3, F4 are parallel to each other
  • the field devices F2, F3, F4 instead of the external starter box SB have a starter circuit, which is housed within the housing of the respective field device F2, F3, F4, and in particular in the operating electronics of the respective field device F2, F3, F4 is integrated.
  • the starter circuits S4, S5, S6 can essentially consist in each case of at least one switching delay SV1, SV2, SV3, by which the respectively connected field device F2, F3, F4 is connected to the voltage source PS only after a predetermined delay time.
  • Delay times of the starter circuits S4, S5, S6 are matched to one another such that a field device F2, F3, F4 connected to one of the starter circuits S4, S5, S6 is first connected to the voltage source PS when the preceding field device or the
  • HART field devices this is, for example, the multidrop mode.
  • a HART field device following a preceding HART field device starts, for example, only when the preceding HART field device already has a substantially constant state in the multidrop operating mode
  • the start time of a field device can also be measured and the delay time set accordingly.
  • the Heidelbergverzogerer one, several or all of the starter circuit S4, S5, S6 connected field devices F2, F3, F4 can be triggered, for example, manually.
  • the switching delays SV1, SV2, SV3 are triggered, thereby starting the connected field devices one after the other.
  • the field devices F1, F2, F3, F4 can in particular on the
  • Two-wire current loop 2L and the starter box SB also form a bus system, via which they exchange data with each other and / or with a control unit, not shown.
  • the bus system can preferably also be put into operation after the field devices have been started, ie operate in a specific operating mode with a substantially constant current consumption.
  • Figure 2 shows another embodiment of the proposed invention.
  • a starter circuit S1, S2, S3 independently recognizes here on the basis of the current consumption when the currently started field device F5, F6, F7 has reached a certain predetermined operating mode with a substantially constant current consumption, which serves to operate the field device, and then connects the corresponding one predetermined sequence of field devices subsequent field device with the power supply PS.
  • the sequence of the field devices can be specified by the order in which the field devices are connected to the two-wire current loop 2L or in which the starter circuits, via which the field devices are connected to the two-wire current loop, are connected to one another. Since the embodiment according to Figure 2, in contrast to the
  • Embodiment according to Figure 1 regardless of a predetermined, possibly oriented at the start time of the respective field device delay time, but rather takes into account the actual current consumption of the field device connected to the starter circuit, the embodiment of Figure 2 represents a particularly preferred embodiment.
  • the field devices F5, F6, F7 are connected to a current-limited power supply PS.
  • Each of the field devices F5, F6, F7 has a starter circuit S1, S2, S3, by which the current consumption of the respective field device F5, F6, F7 is determined.
  • the starter circuit S2 has a plurality of terminals E2, B2, V6.
  • Input-side terminals E2 can be connected to the Power supply PS or serve with a previous starter circuit S1, while the supply terminals V6 for connecting the
  • Field device F6 whose power consumption is to be monitored serve.
  • output-side connections B2 are provided, which are provided for connecting the optionally following field device F7.
  • the field device F6 whose current consumption is to be monitored, can for this purpose via the supply terminals V6 parallel to the other
  • a measuring device ME2 for determining the current consumption of the field device F6 can be integrated in the starter circuit S2.
  • the measuring device ME2 can, for example, between the two-wire current loop 2L and the
  • the starter circuit S2 may further comprise a control unit C2, which controls a switch W2.
  • the measuring device ME2 may be connected to the control unit C2, it being possible to determine by the measuring device ME2 output to the control unit C2 whether the current consumption of the connected field device F6 is substantially constant, ie whether the field device F6 in the specific operating mode , is. Based on this, the switch W2 can be controlled by the control unit C2 to the subsequent field device F7 and the output side terminals B2 of the starter circuit S2, via which the subsequent field device F7 with the
  • Starter circuit S2 is connected to disconnect from the power source PS, so that via the output side terminals no supply voltage can be tapped. Furthermore, the switch W2 can then be used to connect the output-side terminals B2 to the voltage source PS and thereby supply the subsequent field device F7 with the supply voltage.
  • the proposed invention allows more than one field device to be operated on a current-limited feeding output of a voltage supply PS.
  • the power supply PS is another device and this one supplying device has a, in particular unlimited, energy source and the field devices to be connected, which may be in particular HART field devices, locally localized close to each other.
  • this is the case, for example, with a wireless adapter connected to one or more field devices.
  • a wireless adapter connected to one or more field devices.
  • the adapter itself can then be fed in such a case via a power supply or other high-capacity power source.
  • the starter circuits S1, S2, S3 can thereby, as shown in Figure 2, externally, i. be arranged outside of the respective field device and preferably housed together in a housing and so for example. Formed in the embodiment of Figure 4 starter box SB1 form. Alternatively, the starter circuits S1, S2, S3 can be located within the housing of the respective field device. Of course, more than the field devices F5, F6, F7 shown in FIG. 2 can also be connected to one another, in particular via the starter circuits S1, S2, S3.
  • Figure 3 shows the transient of the current waveform when a field device is turned on, i. the inrush current l (t).
  • a field device has a very nonuniform, i. fluctuating, current consumption, which assumes after a certain time, a value that is essentially predetermined by a certain operating mode and is used to operate the field device.
  • the actual course of the current consumption can be approximated by an envelope H.
  • FIG. 4 shows a further embodiment of the present invention in the form of a starter box SB1.
  • the starter box SB1 according to the embodiment in Figure 4 has two input-side terminals in the form of a first
  • Power supply PS is connectable. Furthermore, the starter box SB1 further terminals A1, A2, A3, A4, which is used for connecting Serve field devices. By way of example only one field device F8 is shown in FIG.
  • connection terminals shown can be provided for connecting field devices to the starter box SB1.
  • the SB1 starter box then makes it easy to put the connected field devices into operation. To do this, the field devices are connected one after the other, one after the other, one after the other, after they have been connected to the starter box SB1.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Power Engineering (AREA)
  • Programmable Controllers (AREA)

Abstract

L'invention concerne un dispositif (SB) pour faire fonctionner des appareils de terrain (F1 -F4), pouvant être connecté à une alimentation en tension (PS) servant à alimenter les appareils de terrain (F1 -F4) en énergie électrique. Selon l'invention, le dispositif (SB) comporte au moins un circuit d'amorçage (S1) servant à séparer, de l'alimentation en tension (PS), au moins un appareil de terrain (F2) consécutif à un appareil de terrain précédent (F1) selon une séquence définie d'appareils de terrain (F1 -F4), au moins jusqu'à ce que l'appareil de terrain précédent (F1) reçoive un courant sensiblement constant servant à faire fonctionner l'appareil de terrain précédent (F1) dans un mode de fonctionnement défini.
PCT/EP2011/060822 2010-07-01 2011-06-28 Procédé et dispositif pour faire fonctionner des appareils de terrain, notamment des appareils de terrain hart en mode de fonctionnement multipoint WO2012000996A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010030821.8 2010-07-01
DE102010030821A DE102010030821A1 (de) 2010-07-01 2010-07-01 Verfahren und Vorrichtung zur Inbetriebnahme von Feldgeräten, insbesondere von HART-Feldgeräten im Multidrop-Betriebsmodus

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Publication Number Publication Date
WO2012000996A2 true WO2012000996A2 (fr) 2012-01-05
WO2012000996A3 WO2012000996A3 (fr) 2012-05-31

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WO (1) WO2012000996A2 (fr)

Cited By (1)

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DE102013104139A1 (de) 2013-04-24 2014-10-30 Endress + Hauser Process Solutions Ag Verfahren und Vorrichtung zur Inbetriebnahme eines Feldgerätes

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PL3247015T5 (pl) * 2016-05-18 2023-03-27 Thales Management & Services Deutschland Gmbh Urządzenie zasilające oraz sposób pracy urządzenia zasilającego
EP3415399B1 (fr) 2017-06-16 2019-10-23 Siemens Mobility AG Système d'alimentation à sureté intégrée d'un consommateur électrique à l'aide d'un bus d'énergie redondant
EP3531137B1 (fr) * 2018-02-26 2020-10-28 Thales Management & Services Deutschland GmbH Dispositif d'alimentation en énergie et procédé de fonctionnement d'un dispositif d'alimentation en énergie
DE102019201322A1 (de) * 2019-02-01 2020-08-06 Vega Grieshaber Kg Analog-Digitaler Mischbetrieb für einen Sensoreingang

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US6870722B2 (en) * 1999-06-24 2005-03-22 Relcom, Inc. Enhanced spur cable circuit protection device and method for its implementation
DE19929641B4 (de) * 1999-06-28 2006-01-26 Phoenix Contact Gmbh & Co. Kg Schaltung zum Einschalten und Betreiben von bezüglich ihrer Versorgungsspannung in Reihe geschalteten Geräten in einer Steuer- und Datenübertragungsanlage
DE102004037924A1 (de) * 2004-08-04 2006-03-16 Endress + Hauser Process Solutions Ag Modulartige Anschlußvorrichtung in einem Bussystem zum Schutz eines elektrischen Verbrauchers

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Publication number Priority date Publication date Assignee Title
US20080040515A1 (en) 2003-12-22 2008-02-14 Ralf Schaetzle Method and System for Automated Configuring of a Hart Multi-Drop System

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013104139A1 (de) 2013-04-24 2014-10-30 Endress + Hauser Process Solutions Ag Verfahren und Vorrichtung zur Inbetriebnahme eines Feldgerätes
WO2014173602A1 (fr) 2013-04-24 2014-10-30 Endress+Hauser Process Solutions Ag Procédé et dispositif d'alimentation d'un appareil de terrain lors de sa mise en service

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DE102010030821A1 (de) 2012-01-05
WO2012000996A3 (fr) 2012-05-31

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