EP1037234B1 - Circuit de sécurité avec contacteurs - Google Patents

Circuit de sécurité avec contacteurs Download PDF

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Publication number
EP1037234B1
EP1037234B1 EP00102642A EP00102642A EP1037234B1 EP 1037234 B1 EP1037234 B1 EP 1037234B1 EP 00102642 A EP00102642 A EP 00102642A EP 00102642 A EP00102642 A EP 00102642A EP 1037234 B1 EP1037234 B1 EP 1037234B1
Authority
EP
European Patent Office
Prior art keywords
code signal
evaluation unit
safety
switching arrangement
line
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP00102642A
Other languages
German (de)
English (en)
Other versions
EP1037234A2 (fr
EP1037234A3 (fr
Inventor
Franz Josef Dold
Jens Niehus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sick AG
Original Assignee
Sick 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 Sick AG filed Critical Sick AG
Publication of EP1037234A2 publication Critical patent/EP1037234A2/fr
Publication of EP1037234A3 publication Critical patent/EP1037234A3/fr
Application granted granted Critical
Publication of EP1037234B1 publication Critical patent/EP1037234B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits

Definitions

  • the invention relates to a safety switching arrangement according to the preamble of claim 1.
  • the object of the invention is a safety switching arrangement to create the genus mentioned at the beginning, with a considerable reduced wiring effort and easy to install and to be put into operation.
  • each opening switch triggered a characteristic code signal when opened and is common to all or more opening switches Line of the evaluation unit is supplied.
  • the previously required star-shaped wiring of the opening switches provided diagnostic contacts; it is through serial concatenation of diagnostic signals replaced. Additional PLC inputs on the evaluation unit can be avoided in this way.
  • the embodiment according to claim 4 While in the embodiment according to claim 3, the wiring effort is particularly low, the embodiment according to claim 4 the advantage of a strict separation of diagnostic and safety circuit, which leads to simpler evaluation logic in the evaluation unit.
  • Another way of generating the code sequence or code signal according to claim 5 is that the mechanical force at Press the safety opening switch to generate a short one electronic signal is used. In this case there is an additional one Power supply and the necessary wiring effort dispensable. It is only necessary that the safety opening switch is modified accordingly.
  • Each code signal generator therefore sets when the assigned safety opening switch is actuated a unique code sequence either the safety path formed by the line sections or on the additionally provided single diagnostic line.
  • the safety path (Safety line and safety line sections) is normal, closed state closed.
  • An ASICS or microprocessor can have a unique code sequence or a unique code signal can be programmed, which one is issued in the event of actuation of the opening switch. This is the special power supply according to claim 6 expedient. This can possibly also from the safety path or the diagnostic line be won. Commercial safety switches can still be used are used, which then with a corresponding additional Electronics must be equipped.
  • the code signal generators are preferably designed according to claim 7.
  • An advantageous development of this embodiment can be seen Claim 8.
  • the code signal of the code signal generators can either according to claim 9 thereby being applied to the safety or diagnostic line, that the closing switch in an activation line of the microrprocessor be introduced and the signal output constantly with the safety or diagnosis line is connected, or in that the microprocessor is constantly activated and the closing switches are arranged in the signal output become.
  • connection test-out of the evaluation unit is expedient issued a test signal for error detection, which on the connection Test-In is read back. If an opening switch is actuated the data flow is interrupted. At the same time, the closing switch closed, whereupon the one generated by the assigned code signal generator Code sequence modulated onto the safety path or the diagnostic line becomes.
  • the Test-In or Diagnostic-In connection recognizes this code sequence and assigns it to the corresponding opening switch via a Connection table to which is created during installation. Any safety switch receives a unique and unique assignment from the factory Code sequence.
  • the invention has the advantage that the star-shaped wiring of the diagnostic contacts omitted and thus the cabling effort on the safety path can be reduced. Beyond that no individual Diagnostic inputs on the evaluation unit required. this means Additional savings in the area of decentralized inputs and outputs.
  • the evaluation of test signals is already in intelligent controls or decentralized inputs and outputs, so that there is no major additional Development effort is necessary.
  • the invention is not only limited to emergency stop switching arrangements, but ultimately also when daisy chaining all outputs with contacts of security devices applicable, e.g. with safety gate switches, contactless protective devices, position switches, two-hand controls Etc.
  • Redundant security paths are used to achieve higher security classes used.
  • the circuit does not have to be expanded for this. Installation and commissioning are simplified due to the line savings as well as through the use of existing system configuration tools, like PC tools.
  • an evaluation unit 11 has a test-in connection 23, a test-out connection 24 and a voltage supply connection 25 on.
  • the test-in connection 23 leads over a first safety line section 16a to a first safety opening switch 12a, then via a second security line section 16b to one second safety opening switch 12b and then continue via one third security line section 16c to a third security opening switch 12c and from there via a safety line return 16 back to test-out port 24.
  • Each opening switch 12a, 12b, 12c is a closing switch 17a, 17b, 17c associated with the opening of the associated opening switch 12a, 12b, 12c closes.
  • the closing switches 17a, 17b, 17c are on the one hand with a code signal generator 13a, 13b, 13c and on the other hand with the input 14a, 14b, 14c of the associated opening switch 12a, 12b, 12c connected.
  • the generators 13a, 13b, 13c are designed so that each one of them characteristic for the assigned opening switch 12a, 12b, 12c Code signal or a characteristic code sequence can generate as soon as the assigned opening switch 12a, 12b, 12c opens or the assigned one Closing switch 17a, 17b, 17c closes.
  • the code signal arrives either via the line section 16a or the line sections 16a, 16b and the closed opening switch 12a or the line sections 16a, 16b, 16c and the closed opening switches 12a, 12b to the test-in connection 23 of the evaluation unit 11, where due to the Content of the individual code signals or code sequences is recognized, which the opening switch 12a, 12b, 12c has addressed.
  • the opening switch 12b opens on a transfer line or a conveyor belt 12b either automatically or due to manual operation, whereupon the safety path is interrupted and the evaluation unit 11 signals a fault via the test-in / test-out connections 23, 24 becomes.
  • the code signal generator outputs 13b via the line sections 16a, 16b and the closed opening switch 12a to the test-in input 23 for the opening switch 12b characteristic code signal, on the basis of which the evaluation unit 11 recognizes that of the three opening switches 12a, 12b, 12c the opening switch 12b has been opened. This is the point of failure identified.
  • the code signal generators 13a, 13b, 13c as a core component have a microprocessor 19.
  • the power supply of the microprocessor 19 takes place via a voltage converter 22 which via the voltage supply line 18 to the voltage supply connection 25 of the evaluation unit 11 is created.
  • the voltage converter 22 sets the one present at the output 25 of the evaluation unit Voltage of 24V, for example, into a stabilized 5V voltage.
  • the microprocessor 19 is opened by opening the opening switch 12a, 12b, 12c or closing of the associated closing switch 17a, 17b, 17c activated, whereupon he sends the code signal at his signal output 21 to one Output amplifier 20, from which it to the safety line section 16b arrives.
  • the activation of the microprocessor 19 takes place in that the positive supply voltage line (5 V) an activation line 28 is branched off via the closing switch 17 b to an activation input 27 of the microprocessor 19 leads.
  • the signal output 21 of the microprocessor 19 is via the amplifier 20 either to the assigned safety line section 16a, 16b, 16c or the diagnostic line 15 (FIG. 2).
  • the safety path when actuating one of the Opening switch 12a, 12b, 12c is open at this point, that is in of the evaluation unit 11 generated monitoring signal in this case interrupted. Thus, it can be in the subsequent transmission of the characteristic code signal over sections of the security path not to a data collision between the monitoring (test) signal and the generator code sequence come.
  • the microprocessor 19 has the characteristic Transmits code signal continuously, the closing switches 17a, 17b, 17c in the path between the signal output 21 and the connection point (14b) of the amplifier 20 would have to be provided. Is preferred in this case the closing switch 17a, 17b, 17c is provided at the output of the amplifier 20.
  • Inexpensive small microprocessors are available for the application according to the invention, e.g. the PIC 12C508 (8-pin, 8 bit S08 housing) from Microchip available.

Landscapes

  • Keying Circuit Devices (AREA)
  • Air Bags (AREA)
  • Safety Devices In Control Systems (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (10)

  1. Configuration de circuit de sécurité avec au moins deux commutateurs à ouverture (12a, 12b, 12c) associés en série à une unité d'évaluation (11), sachant que, lors de l'ouverture d'au moins un des commutateurs à ouverture (12a, 12b, 12c), l'unité d'évaluation (11) déclenche un signal de sécurité et constate lequel des commutateurs à ouverture (12a, 12b, 12c) a été ouvert,
       caractérisée en ce que
       à au moins un commutateur à ouverture (12a, 12b, 12c) est affecté un générateur de signaux codés (13a, 13b, 13c) qui, lors de l'ouverture du commutateur à ouverture (12a, 12b, 12c) correspondant, par une ligne conduisant à l'unité d'évaluation (11), commune à tous les commutateurs à ouverture (12a, 12b, 12c) affectés à un générateur de signaux codés (13a, 13b, 13c), délivre un signal codé caractéristique pour le commutateur à ouverture (12a, 12b, 12c) concerné, lequel signal est analysé dans l'unité d'évaluation (11) et est reconnu comme originaire du commutateur à ouverture (12a, 12b, 12c) en question.
  2. Configuration de circuit de sécurité selon la revendication 1,
       caractérisée en ce que
       à chaque commutateur à ouverture (12a, 12b, 12c) est affecté un commutateur à fermeture (17a, 17b, 17c) actionné en commun avec lui, qui active lors de la fermeture le générateur de signaux codés (13a, 13b, 13c) affecté.
  3. Configuration de circuit de sécurité selon la revendication 1 ou 2,
       caractérisée en ce que
       lors de l'ouverture du commutateur à ouverture (12a, 12b, 12c), la sortie de signal codé de chaque générateur de signaux codés (13a, 13b, 13c) est reliée à son entrée (14a, 14b, 14c) et en ce que le signal codé émis par le générateur de signaux codés (13a, 13b, 13c) concerné accède à l'unité d'évaluation (11) par l'intermédiaire du ou des tronçons de ligne de sécurité (16a, 16b, 16c) conduisant au commutateur à ouverture (12a, 12b, 12c) ouvert et des commutateurs à ouverture (12b, 12c) fermés se trouvant devant lui, et y est évalué.
  4. Configuration de circuit de sécurité selon la revendication 1 ou 2,
       caractérisée en ce que
       lors de l'ouverture du commutateur à ouverture (12a, 12b, 12c) affecté, la sortie de signaux codés de chaque générateur de signaux codés (13a, 13b, 13c) est connectée à une ligne de diagnostic (15) particulière, commune à tous les commutateurs à ouverture (12a, 12b, 12c), qui conduit à l'unité d'évaluation (11), où le signal codé émis par le générateur de signaux codés (13a, 13b, 13c) activé est exploité.
  5. Configuration de circuit de sécurité selon la revendication 1 ou 2,
       caractérisée en ce que
       le générateur de signaux codés (13a, 13b, 13c) est amené à produire le signal codé par le mouvement mécanique du commutateur à ouverture (12a, 12b, 12c).
  6. Configuration de circuit de sécurité selon l'une quelconque des revendications précédentes,
       caractérisée en ce que
       chaque générateur de signaux codés (13a, 13b, 13c) est branché à l'unité d'évaluation (11) par l'intermédiaire d'une ligne d'alimentation en tension (18) commune à tous les générateurs de signaux codés (13a, 13b, 13c).
  7. Configuration de circuit de sécurité selon l'une quelconque des revendications précédentes,
       caractérisée en ce que
       chaque générateur de signaux codés (13a, 13b, 13c) comporte un ASICS ou un microprocesseur (19) pour la génération du signal codé.
  8. Configuration de circuit de sécurité selon la revendication 7,
       caractérisée en ce que
       la sortie de signal (21) du microprocesseur (19) est branchée par l'intermédiaire d'un amplificateur (20) à la ligne (15) menant à l'unité d'évaluation (11), ou aux tronçons de ligne (16a, 16b, 16c) menant à l'unité d'évaluation (11).
  9. Configuration de circuit de sécurité selon la revendication 8,
       caractérisée en ce que
       les commutateurs à fermeture (17a, 17b, 17c) sont prévus dans une ligne d'activation (28) menant à une entrée d'activation (27) du microprocesseur (19), dérivée de l'alimentation en tension (18, 22), ou dans la voie de sortie de signal (20, 21) du microprocesseur (19).
  10. Configuration de circuit de sécurité selon l'une quelconque des revendications précédentes,
       caractérisée en ce que
       l'unité d'évaluation (11) comporte des branchements d'entrée de test (23), de sortie de test (24), d'alimentation en tension (25) et, le cas échéant, d'entrée de diagnostic (26).
EP00102642A 1999-03-16 2000-02-08 Circuit de sécurité avec contacteurs Expired - Lifetime EP1037234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19911698 1999-03-16
DE19911698A DE19911698A1 (de) 1999-03-16 1999-03-16 Sicherheitsschaltanordnung

Publications (3)

Publication Number Publication Date
EP1037234A2 EP1037234A2 (fr) 2000-09-20
EP1037234A3 EP1037234A3 (fr) 2003-04-02
EP1037234B1 true EP1037234B1 (fr) 2004-12-15

Family

ID=7901174

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00102642A Expired - Lifetime EP1037234B1 (fr) 1999-03-16 2000-02-08 Circuit de sécurité avec contacteurs

Country Status (4)

Country Link
US (1) US6417582B1 (fr)
EP (1) EP1037234B1 (fr)
AT (1) ATE285117T1 (fr)
DE (2) DE19911698A1 (fr)

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DE20102459U1 (de) * 2001-02-13 2001-06-13 Thyssen Fahrtreppen Gmbh Fahrtreppe oder Fahrsteig
DE102004020997A1 (de) * 2004-04-19 2005-11-03 Pilz Gmbh & Co. Kg Sicherheitsschalteinrichtung für eine Sicherheitsschaltung
US7193510B2 (en) * 2005-05-02 2007-03-20 Honeywell International Inc. Safety interlock circuit with diagnostics requiring no extra signal wires
DE102007045989B4 (de) * 2007-09-26 2011-03-31 Siemens Ag Sicherheitsschaltgerät und Verfahren zum sicherheitsgerichteten Schalten
DE102008032823B4 (de) * 2008-07-11 2017-01-12 Sick Ag Sichere Anschlussvorrichtung
DE102009026124A1 (de) 2009-07-07 2011-01-13 Elan Schaltelemente Gmbh & Co. Kg Verfahren und System zur Erfassung, Übertragung und Auswertung sicherheitsgerichteter Signale
DE102010025675B3 (de) 2010-06-25 2011-11-10 Pilz Gmbh & Co. Kg Sicherheitsschaltungsanordnung zum fehlersicheren Ein- und Ausschalten einer gefährlichen Anlage
DE102011016137A1 (de) 2011-03-30 2012-10-04 Pilz Gmbh & Co. Kg Sicherheitsschaltungsanordnung zum fehlersicheren Ein- oder Ausschalten einer gefährlichen Anlage
DE102011102274B4 (de) 2011-05-23 2012-12-06 Pilz Gmbh & Co. Kg Verfahren zum Betreiben eines Sicherheitssteuergeräts
DE102011082941A1 (de) 2011-09-19 2013-03-21 Bender Gmbh & Co. Kg Elektrische Überwachungseinrichtung und Verfahren zur Sicherstellung der Schutzfunktion einer Fehlerstrom-Schutzeinrichtung (RCD) Typ A
EP2682834B1 (fr) * 2012-07-03 2019-05-29 Keba Ag Procédé et dispositif de surveillance d'un appareil de commutation de sécurité
DE102013101932A1 (de) * 2013-02-27 2014-08-28 Pilz Gmbh & Co. Kg Sicherheitsschaltvorrichtung zum Ein- und fehlersicheren Ausschalten einer technischen Anlage
DE102013112488A1 (de) 2013-11-13 2015-05-13 Pilz Gmbh & Co. Kg Sicherheitssteuerung mit konfigurierbaren Eingängen
DE102016118004A1 (de) 2016-09-23 2018-03-29 Phoenix Contact Gmbh & Co. Kg Kommunikationssystem zur strommodulierten Datenübertragung über eine Stromschleife

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Also Published As

Publication number Publication date
ATE285117T1 (de) 2005-01-15
US6417582B1 (en) 2002-07-09
EP1037234A2 (fr) 2000-09-20
EP1037234A3 (fr) 2003-04-02
DE19911698A1 (de) 2000-09-21
DE50008927D1 (de) 2005-01-20

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