EP0562959B1 - Information input module with electrical contacts for command- and control-installations - Google Patents

Information input module with electrical contacts for command- and control-installations Download PDF

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Publication number
EP0562959B1
EP0562959B1 EP93400762A EP93400762A EP0562959B1 EP 0562959 B1 EP0562959 B1 EP 0562959B1 EP 93400762 A EP93400762 A EP 93400762A EP 93400762 A EP93400762 A EP 93400762A EP 0562959 B1 EP0562959 B1 EP 0562959B1
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EP
European Patent Office
Prior art keywords
detection member
contact
input
detection
electrically connected
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EP93400762A
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German (de)
French (fr)
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EP0562959A1 (en
Inventor
Patrick Debussche
Thomas Fisch
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Cegelec SA
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Cegelec SA
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/60—Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces
    • H01H1/605—Cleaning of contact-making surfaces by relatively high voltage pulses

Definitions

  • the invention relates to an information input module by electrical contact for a control / command installation.
  • Such a module is known from document EP-0101643. It is designed primarily to detect a command entered via an electrical contact and provide information necessary for a control / command installation.
  • the electrical contact for example a push button, is electrically connected to a detection member such as an optocoupler.
  • This module is designed to incorporate a single electrical contact and a single detection device. Furthermore, this known module does not include an operating test circuit of the detection member.
  • a module must be able to include several contacts and several detection devices, each associated with a contact and installed on a media such as a printed circuit board.
  • the difference in electrical potential at the power supply inputs of such a module can vary to a large extent, for example between 48 and 127 volts, depending on the installation which receives it. Therefore, currently, it is necessary to adapt on a case-by-case basis, as a function of the difference in supply potential of the module, the characteristics of the detection member that it comprises as well as the number of contacts that can be implemented due to problems due to the effects of heat dissipation of components on the support.
  • a voltage regulator for example a switching regulator, having an output connected to the first terminal of the contact through the detection member, this output delivering a voltage lower than the voltage. , possibly variable, applied to the first input of the module.
  • each contact remains subject to the difference in supply potential of the module which may vary.
  • Each detection member receives a voltage which can be lower than the voltage of the first input, which makes it possible to use the same detection device for modules supplied with variable voltages. It also follows that the consumption of the module is reduced, which limits the effects of heat dissipation and makes it possible to increase the number of detection members that can be implemented on the same support. By suitably choosing the value of the resistors, the intensity of the current which the detection member must detect can be adjusted so that it is sufficient but not too high.
  • the function test circuit is directly integrated into the module and can be easily implemented. It makes it possible to test the operation of each detection member whatever the potential difference applied to the input terminals of the module.
  • test elements can be semiconductor elements.
  • Each detection member associated with a contact is, on the one hand, electrically connected to the first terminal of this contact through a resistor and a first diode, and on the other hand, electrically connected to the second input. power supply through said resistor, a second diode and the second test element.
  • FIG. 1 schematically represents a logic information input module according to the invention including elements for testing the operation of the detection members.
  • FIG. 2 schematically represents the logic information input module of FIG. 1 according to a first mode of control of the test elements.
  • FIG. 3 schematically represents the logic information input module of FIG. 1 according to a second mode of control of the test elements.
  • the information input module 20 by electrical contacts comprises two voltage supply inputs 1,2, one 1 receiving a voltage + VP, the other 2 receiving a voltage 0VP.
  • the potential difference + VP-OVP can have any value between 48 volts and 127 volts.
  • a switching voltage regulator 10, conventional in itself, is connected to the two inputs 1, 2 to produce on an output 11 a regulated voltage VR which is less than the voltage + VP and equal for example to 24 volts.
  • the module 20 also includes several electrical contacts 3, three of which are shown. Each contact 3 has two terminals 4,5 and a contact member 6 which when actuated establishes an electrical contact between the terminals 4,5. In the figure, the contacts are shown at rest. In the rest state, the terminals 4,5 are not electrically connected to each other by the contact member.
  • the module 20 also comprises several detection members 7 each associated with a contact 3. Each detection member, which can be a conventional optocoupler in itself, is sensitive to the passage of an electric current which takes place when the contact associated with it is activated and provides a logic information input signal SD which represents it to a control / command installation 30.
  • the output 11 of the switching voltage regulator is connected by line 12 to terminal 4 of each of the contacts 3 through the detection member 7 which is associated with it. Each detection member therefore receives the regulated voltage VR by line 12.
  • Input 1 is also connected to terminal 4 of each contact 3 by a line 17 and through a first resistor 14 and input 2 is connected to each terminal 5 of a contact by a line 11 '.
  • Each terminal 4 of a contact 3 is connected to the detection member 7 through a decoupling diode 13 and a second resistor 15.
  • the terminals 4.5 of each contact 3 are therefore subject to all of the potential difference + VP-0VP.
  • Each diode 13 protects the detection member 7 to which it is connected by letting an electric current only pass from the detection member to the terminal 4 of the contact associated with it.
  • the resistors 15 have values such that the current detected by a detection member 7 when the contact associated therewith is actuated is sufficient without being too large.
  • each resistor 15 has a value of 24KOhms.
  • the resistors 14 have a high resistivity, for example 120KOhms, which limits the intensity of the current flowing between the terminals of each contact when it is actuated. This arrangement makes it possible to considerably limit the power dissipated by the module.
  • the module 20 also includes elements for testing the operation of the detection members allowing the simulation of actuation or not of the contacts.
  • a first test element 8 is interposed between the output 11 of the switching voltage regulator and each detection member 7.
  • This test element 8 which can be a semiconductor element such as a transistor is controlled by an SCO signal generated by the control installation 30. In response to this signal SCO, the test element 8 opens line 12.
  • the input 2 is connected to each resistor 15 by a line 12 'through decoupling diodes 16 and a second test element 9 similar to the element 8.
  • the line 12' is normally open.
  • the test element 9 is controlled by a signal SC1 generated by the control / command installation 30. In response to this signal SC1, the test element 9 closes the line 12 '.
  • test element 8 opens the line 12 as visible in FIG. 2.
  • the detection members 7 are no longer supplied with voltage although certain contacts 3 can be actuated.
  • the monitoring / control installation can then verify that no detection device supplies an SD detection signal. This test mode simulates the operation of the detection devices when the contacts are in the rest state.
  • test element 9 closes the line 12 ′ as visible in FIG. 3.
  • the detection members 7 are supplied with voltage and must detect a current although certain contacts are at rest. The monitoring / control installation can then check that all the detection devices supply an SD signal. This test mode simulates the operation of the detection devices when the contacts are actuated.
  • test elements 8, 9 are supplied by the regulated voltage VR, the time taken by each test element to cut or close the line to which it is connected is independent of variations in the difference in supply potential of the module. This is advantageous in the case where the instants for testing the operation of the detection members must be dated very precisely and uniformly whatever these variations.

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  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Description

L'invention porte sur un module d'entrée d'information par contact électrique pour installation de contrôle/commande.The invention relates to an information input module by electrical contact for a control / command installation.

Un tel module est connu du document EP-0101643. Il est conçu en premier lieu pour détecter une commande entrée par l'intermédiaire d'un contact électrique et fournir une information nécessaire à une installation de contrôle/commande. Dans le document EP-0101643, le contact électrique, par exemple un bouton poussoir, est relié électriquement à un organe de détection tel qu'un optocoupleur. Ce module est prévu pour incorporer un seul contact électrique et un seul organe de détection. Par ailleurs, ce module connu n'inclut pas de circuit de test de fonctionnement de l'organe de détection.Such a module is known from document EP-0101643. It is designed primarily to detect a command entered via an electrical contact and provide information necessary for a control / command installation. In document EP-0101643, the electrical contact, for example a push button, is electrically connected to a detection member such as an optocoupler. This module is designed to incorporate a single electrical contact and a single detection device. Furthermore, this known module does not include an operating test circuit of the detection member.

On souhaite aujourd'hui standardiser la réalisation de ce type de module d'entrée d'information pour diminuer son coût sachant qu'un module doit pouvoir comporter plusieurs contacts et plusieurs organes de détection, chacun associé à un contact et mis en place sur un support tel qu'une carte de circuit imprimé. Par ailleurs, la différence de potentiel électrique aux entrées d'alimentation d'un tel module peut varier dans une large mesure, par exemple entre 48 et 127 volts, selon l'installation qui le reçoit. De ce fait, actuellement, il est nécessaire d'adapter au cas par cas, en fonction de la différence de potentiel d'alimentation du module, les caractéristiques de l'organe de détection qu'il comporte ainsi que le nombre des contacts pouvant être mis en oeuvre en raison des problèmes dus aux effets de la dissipation de chaleur de composants sur le support. Actuellement, lorsque la différence de potentiel à laquelle sont soumises les entrées d'alimentation d'un module est de 48 volts, 16 contacts peuvent être mis en oeuvre. Lorsque la différence de potentiel est de 127 volts, seulement 8 contacts peuvent être mis en oeuvre pour maintenir la puissance dissipée en dessous d'un certain niveau.We now want to standardize the production of this type of information input module to reduce its cost, knowing that a module must be able to include several contacts and several detection devices, each associated with a contact and installed on a media such as a printed circuit board. Furthermore, the difference in electrical potential at the power supply inputs of such a module can vary to a large extent, for example between 48 and 127 volts, depending on the installation which receives it. Therefore, currently, it is necessary to adapt on a case-by-case basis, as a function of the difference in supply potential of the module, the characteristics of the detection member that it comprises as well as the number of contacts that can be implemented due to problems due to the effects of heat dissipation of components on the support. Currently, when the potential difference to which the power inputs of a module are subjected is 48 volts, 16 contacts can be implemented. When the potential difference is 127 volts, only 8 contacts can be used to keep the dissipated power below a certain level.

Pour pallier cet inconvénient, on pourrait prévoir d'utiliser un régulateur de tension, par exemple à découpage, ayant une sortie reliée à la première borne du contact au travers de l'organe de détection, cette sortie délivrant une tension plus basse que la tension, éventuellement variable, appliquée à la première entrée du module.To overcome this drawback, provision could be made for using a voltage regulator, for example a switching regulator, having an output connected to the first terminal of the contact through the detection member, this output delivering a voltage lower than the voltage. , possibly variable, applied to the first input of the module.

Toutefois, on souhaite pouvoir utiliser un tel module avec plusieurs contacts qui peuvent réclamer pour un fonctionnement sûr, une différence de potentiel minimale définie à leurs bornes, cette différence de potentiel étant celle aux entrées du module. Cette différence de potentiel minimale est telle qu'elle assure, que lors de la fermeture d'un contact, une étincelle d'auto-nettoyage se produise entre les bornes de celui-ci. Dans le cas contraire, les bornes du contact s'oxydent dans le temps et celui-ci devient isolant même lorsqu'il est actionné.However, it is desired to be able to use such a module with several contacts which may require, for safe operation, a minimum potential difference defined at their terminals, this potential difference being that at the inputs of the module. This minimum potential difference is such that it ensures that when a contact closes, a self-cleaning spark occurs between the terminals of the latter. Otherwise, the contact terminals oxidize over time and it becomes insulating even when it is actuated.

Le but de l'invention est de proposer un module d'entrée d'information qui répond aux contraintes suivantes.

  • les entrées d'alimentation peuvent être soumises à une différence de potentiel variable allant par exemple de 48 à 127 volts,
  • les organes de détection restent soumis à une faible différence de potentiel, par exemple de 24 volts ou moins, pour limiter les effets de dissipation de chaleur,
  • les contacts restent soumis à la différence de potentiel d'alimentation du module pour assurer le nettoyage du contact au moment de la fermeture,
  • le courant est constant (10mA) dans le cas où le contact est fermé afin d'éviter les phénomènes d'oxydation,
  • le module inclut un circuit de test de fonctionnement basse tension des organes de détection qui est simple, fiable, et qui garantit des temps de test constants.
The object of the invention is to propose an information input module which meets the following constraints.
  • the power inputs can be subjected to a variable potential difference ranging for example from 48 to 127 volts,
  • the detection members remain subject to a small potential difference, for example 24 volts or less, to limit the effects of heat dissipation,
  • the contacts remain subject to the difference in supply voltage of the module to ensure that the contact is cleaned at the time of closing,
  • the current is constant (10mA) in the case where the contact is closed in order to avoid oxidation phenomena,
  • the module includes a low-voltage operating test circuit for the detection members which is simple, reliable and which guarantees constant test times.

A cet effet, l'invention a pour objet un module d'entrée d'information par contact électrique pour installation de contrôle/commande, comprenant:

  • a) une première et une seconde entrée d'alimentation en tension électrique destinées à être soumises à une différence de potentielle éventuellement variable,
  • b) plusieurs contacts ayant chacun une première borne reliée électriquement à ladite première entrée par l'intermédiaire d'une première résistance et une deuxième borne reliée électriquement à ladite seconde entrée, chaque contact étant destiné à ouvrir ou fermer un trajet de courant électrique entre ses bornes lorsqu'il est actionné,
  • c) une pluralité d'organes de détection associés respectivement auxdits contacts, chaque organe de détection étant agencé pour détecter la présence ou l'absence d'un passage de courant électrique entre les bornes du contact auquel il est associé et produire un signal représentatif d'une entrée d'information en réponse à l'actionnement du contact,
  • d) un régulateur de tension relié électriquement aux deux entrées d'alimentation et ayant une sortie qui fournit une tension électrique régulée aux organes de détection, chaque organe de détection étant relié électriquement à la première borne du contact auquel il est associé,
  • e) et un circuit de test de fonctionnement des organes de détection interposé d'une part entre la sortie du régulateur et chaque organe de détection et d'autre part entre chaque organe de détection et la seconde entrée d'alimentation, qui est destiné d'une part, à alimenter lesdits contacts au travers des organes de détection, et d'autre part, à les court-circuiter.
To this end, the subject of the invention is an information input module by electrical contact for a control / command installation, comprising:
  • a) a first and a second electrical voltage supply input intended to be subjected to a potential difference of potential which may be variable,
  • b) several contacts each having a first terminal electrically connected to said first input via a first resistor and a second terminal electrically connected to said second input, each contact being intended to open or close an electrical current path between its terminals when activated,
  • c) a plurality of detection members associated respectively with said contacts, each detection member being arranged to detect the presence or absence of a passage of electric current between the terminals of the contact with which it is associated and to produce a signal representative of '' an input of information in response to actuation of the contact,
  • d) a voltage regulator electrically connected to the two supply inputs and having an output which supplies a regulated electric voltage to the detection members, each detection member being electrically connected to the first terminal of the contact with which it is associated,
  • e) and a circuit for testing the operation of the detection members interposed on the one hand between the output of the regulator and each detection member and on the other hand between each detection member and the second supply input, which is intended for on the one hand, to supply said contacts through the detection members, and on the other hand, to short-circuit them.

Selon cette construction, chaque contact reste soumis à la différence de potentiel d'alimentation du module laquelle peut varier. Chaque organe de détection reçoit quant à lui une tension qui peut être plus faible que la tension de la première entrée ce qui permet d'utiliser le même organe de détection pour des modules alimentés par des tensions variables. Il en résulte aussi que la consommation du module est diminuée ce qui limite les effets de dissipation de chaleur et permet d'augmenter le nombre d'organe de détection pouvant être mis en oeuvre sur un même support. En choisissant convenablement la valeur des résistances, l'intensité du courant que l'organe de détection doit détecter peut être réglée de manière que celle-ci soit suffisante mais pas trop élevée. Le circuit de test de fonctionnement est directement intégré au module et peut être facilement réalisé. Il permet de tester le fonctionnement de chaque organe de détection quelque soit le différence de potentielle appliquée aux bornes d'entrée du module.According to this construction, each contact remains subject to the difference in supply potential of the module which may vary. Each detection member receives a voltage which can be lower than the voltage of the first input, which makes it possible to use the same detection device for modules supplied with variable voltages. It also follows that the consumption of the module is reduced, which limits the effects of heat dissipation and makes it possible to increase the number of detection members that can be implemented on the same support. By suitably choosing the value of the resistors, the intensity of the current which the detection member must detect can be adjusted so that it is sufficient but not too high. The function test circuit is directly integrated into the module and can be easily implemented. It makes it possible to test the operation of each detection member whatever the potential difference applied to the input terminals of the module.

Selon un mode de réalisation préféré, le circuit de test de fonctionnement comprend:

  • a) un premier élément de test interposé entre la sortie du régulateur de tension et chaque organe de détection, ce premier élément de test ayant un premier état dans lequel la sortie du régulateur est reliée électriquement à chaque organe de détection et un second état dans lequel la sortie du régulateur est isolée électriquement de chaque organe de détection, et
  • b) un second élément de test interposé entre chaque organe de détection et la seconde entrée d'alimentation, ce second élément de test ayant un premier état dans lequel chaque organe de détection est relié électriquement à la seconde entrée d'alimentation et un second état dans lequel chaque organe de détection est isolé électriquement de la seconde entrée d'alimentation.
According to a preferred embodiment, the operation test circuit comprises:
  • a) a first test element interposed between the output of the voltage regulator and each detection member, this first test element having a first state in which the output of the regulator is electrically connected to each detection member and a second state in which the output of the regulator is electrically isolated from each detection member, and
  • b) a second test element interposed between each detection member and the second power input, this second test element having a first state in which each detection member is electrically connected to the second power input and a second state wherein each detection member is electrically isolated from the second power input.

Les éléments de test peuvent être des éléments à semi-conducteur.The test elements can be semiconductor elements.

Chaque organe de détection associé à un contact est, d'une part, relié électriquement à la première borne de ce contact au travers d'une résistance et d'une première diode, et d'autre part, relié électriquement à la seconde entrée d'alimentation au travers de ladite résistance, d'une seconde diode et du second élément de test.Each detection member associated with a contact is, on the one hand, electrically connected to the first terminal of this contact through a resistor and a first diode, and on the other hand, electrically connected to the second input. power supply through said resistor, a second diode and the second test element.

Un exemple de réalisation de l'invention est décrit en détail ci-dessous en référence aux dessins.An exemplary embodiment of the invention is described in detail below with reference to the drawings.

La figure 1 représente schématiquement un module d'entrée d'informations logiques selon l'invention incluant d'éléments de test de fonctionnement des organes de détection.FIG. 1 schematically represents a logic information input module according to the invention including elements for testing the operation of the detection members.

La figure 2 représente schématiquement le module d'entrée d'informations logiques de la figure 1 selon un premier mode de commande des éléments de test.FIG. 2 schematically represents the logic information input module of FIG. 1 according to a first mode of control of the test elements.

La figure 3 représente schématiquement le module d'entrée d'informations logiques de la figure 1 selon un second mode de commande des éléments de test.FIG. 3 schematically represents the logic information input module of FIG. 1 according to a second mode of control of the test elements.

Sur la figure 1, le module 20 d'entrée d'informations par contacts électriques comprend deux entrées d'alimentation en tension 1,2, l'une 1 recevant une tension +VP, l'autre 2 recevant une tension 0VP. La différence de potentiel +VP-OVP peut avoir une valeur quelconque entre 48 volts et 127 volts. Un régulateur de tension à découpage 10, classique en soi, est relié aux deux entrées 1,2 pour produire sur une sortie 11 une tension régulée VR qui est inférieure à la tension +VP et égale par exemple à 24 volts.In FIG. 1, the information input module 20 by electrical contacts comprises two voltage supply inputs 1,2, one 1 receiving a voltage + VP, the other 2 receiving a voltage 0VP. The potential difference + VP-OVP can have any value between 48 volts and 127 volts. A switching voltage regulator 10, conventional in itself, is connected to the two inputs 1, 2 to produce on an output 11 a regulated voltage VR which is less than the voltage + VP and equal for example to 24 volts.

Le module 20 comporte aussi plusieurs contacts électriques 3 dont trois sont représentés. Chaque contact 3 comporte deux bornes 4,5 et un organe de contact 6 qui lorsqu'il est actionné établit un contact électrique entre les bornes 4,5. Sur la figure, les contacts sont montrés au repos. A l'état de repos, les bornes 4,5 ne sont pas reliées électriquement l'une à l'autre par l'organe de contact. Le module 20 comporte encore plusieurs organes de détection 7 associés chacun à un contact 3. Chaque organe de détection, qui peut être un optocoupleur classique en soi, est sensible au passage d'un courant électrique qui a lieu lorsque le contact qui lui est associé est actionné et fournit un signal d'entrée d'information logique SD qui le représente à une installation de contrôle/commande 30.The module 20 also includes several electrical contacts 3, three of which are shown. Each contact 3 has two terminals 4,5 and a contact member 6 which when actuated establishes an electrical contact between the terminals 4,5. In the figure, the contacts are shown at rest. In the rest state, the terminals 4,5 are not electrically connected to each other by the contact member. The module 20 also comprises several detection members 7 each associated with a contact 3. Each detection member, which can be a conventional optocoupler in itself, is sensitive to the passage of an electric current which takes place when the contact associated with it is activated and provides a logic information input signal SD which represents it to a control / command installation 30.

La sortie 11 du régulateur de tension à découpage est reliée par la ligne 12 à la borne 4 de chacun des contacts 3 au travers de l'organe de détection 7 qui lui est associé. Chaque organe de détection reçoit donc la tension régulée VR par la ligne 12.The output 11 of the switching voltage regulator is connected by line 12 to terminal 4 of each of the contacts 3 through the detection member 7 which is associated with it. Each detection member therefore receives the regulated voltage VR by line 12.

L'entrée 1 est par ailleurs reliée à la borne 4 de chaque contact 3 par une ligne 17 et au travers d'une première résistance 14 et l'entrée 2 est reliée à chaque borne 5 d'un contact par une ligne 11'. Chaque borne 4 d'un contact 3 est reliée à l'organe de détection 7 au travers d'une diode de découplage 13 et d'une seconde résistance 15. Les bornes 4,5 de chaque contact 3 sont donc soumises à la totalité de la différence de potentiel +VP-0VP. Chaque diode 13 protège l'organe de détection 7 auquel elle est reliée en laissant passer un courant électrique seulement de l'organe de détection vers la borne 4 du contact qui lui est associé. Les résistances 15 ont des valeurs telles que le courant détecté par un organe de détection 7 lorsque le contact qui lui est associé est actionné soit suffisant sans être trop important. Pour obtenir un courant d'environ 10mA, chaque résistance 15 à une valeur de 24KOhms. Les résistances 14 ont une résistivité élevée, par exemple 120KOhms, ce qui limite l'intensité du courant circulant entre les bornes de chaque contact lorsqu'il est actionné. Cette disposition permet de limiter considérablement la puissance dissipée par le module.Input 1 is also connected to terminal 4 of each contact 3 by a line 17 and through a first resistor 14 and input 2 is connected to each terminal 5 of a contact by a line 11 '. Each terminal 4 of a contact 3 is connected to the detection member 7 through a decoupling diode 13 and a second resistor 15. The terminals 4.5 of each contact 3 are therefore subject to all of the potential difference + VP-0VP. Each diode 13 protects the detection member 7 to which it is connected by letting an electric current only pass from the detection member to the terminal 4 of the contact associated with it. The resistors 15 have values such that the current detected by a detection member 7 when the contact associated therewith is actuated is sufficient without being too large. To obtain a current of approximately 10mA, each resistor 15 has a value of 24KOhms. The resistors 14 have a high resistivity, for example 120KOhms, which limits the intensity of the current flowing between the terminals of each contact when it is actuated. This arrangement makes it possible to considerably limit the power dissipated by the module.

Le module 20 comporte aussi des éléments de test de fonctionnement des organes de détection permettant la simulation de l'actionnement ou non des contacts. Un premier élément de test 8 est interposé entre la sortie 11 du régulateur de tension à découpage et chaque organe de détection 7. Cet élément de test 8 qui peut être un élément à semi-conducteur tel qu'un transistor est commandé par un signal SCO engendré par l'installation de contrôle/commande 30. En réponse à ce signal SCO, l'élément de test 8 ouvre la ligne 12.The module 20 also includes elements for testing the operation of the detection members allowing the simulation of actuation or not of the contacts. A first test element 8 is interposed between the output 11 of the switching voltage regulator and each detection member 7. This test element 8 which can be a semiconductor element such as a transistor is controlled by an SCO signal generated by the control installation 30. In response to this signal SCO, the test element 8 opens line 12.

Par ailleurs, l'entrée 2 est reliée à chaque résistance 15 par une ligne 12' au travers de diodes de découplage 16 et d'un second élément de test 9 similaire à l'élément 8. La ligne 12' est normalement ouverte. L'élément de test 9 est commandé par un signal SC1 engendré par l'installation de contrôle/commande 30. En réponse à ce signal SC1, l'élément de test 9 ferme la ligne 12'.Furthermore, the input 2 is connected to each resistor 15 by a line 12 'through decoupling diodes 16 and a second test element 9 similar to the element 8. The line 12' is normally open. The test element 9 is controlled by a signal SC1 generated by the control / command installation 30. In response to this signal SC1, the test element 9 closes the line 12 '.

Lorsque l'installation de contrôle/commande engendre le signal SC0, l'élément de test 8 ouvre la ligne 12 comme visible sur la figure 2. Les organes de détection 7 ne sont plus alimentés en tension bien que certains contacts 3 puissent être actionnés. L'installation de contrôle/commande peut alors vérifier qu'aucun organe de détection fournit un signal de détection SD. Ce mode de test simule le fonctionnement des organes de détection lorsque les contacts sont à l'état de repos.When the control / command installation generates the signal SC0, the test element 8 opens the line 12 as visible in FIG. 2. The detection members 7 are no longer supplied with voltage although certain contacts 3 can be actuated. The monitoring / control installation can then verify that no detection device supplies an SD detection signal. This test mode simulates the operation of the detection devices when the contacts are in the rest state.

Lorsque l'installation de contrôle/commande engendre le signal SC1, l'élément de test 9 ferme la ligne 12' comme visible sur la figure 3. Les organes de détection 7 sont alimentés en tension et doivent détecter un courant bien que certains contacts soient à l'état de repos. L'installation de contrôle/commande peur alors vérifier que tous les organes de détection fournissent un signal SD. Ce mode de test simule le fonctionnement des organes de détection lorsque les contacts sont actionnés.When the control / command installation generates the signal SC1, the test element 9 closes the line 12 ′ as visible in FIG. 3. The detection members 7 are supplied with voltage and must detect a current although certain contacts are at rest. The monitoring / control installation can then check that all the detection devices supply an SD signal. This test mode simulates the operation of the detection devices when the contacts are actuated.

Du fait que les éléments de test 8,9 sont alimentés par la tension régulée VR, le temps mis par chaque élément de test pour couper ou fermer la ligne à laquelle il est relié est indépendant des variations de la différence de potentiel d'alimentation du module. Ceci est avantageux dans le cas où les instants de test du fonctionnement des organes de détection doivent être datés très précisément et uniformément quelles que soient ces variations.Since the test elements 8, 9 are supplied by the regulated voltage VR, the time taken by each test element to cut or close the line to which it is connected is independent of variations in the difference in supply potential of the module. This is advantageous in the case where the instants for testing the operation of the detection members must be dated very precisely and uniformly whatever these variations.

Claims (3)

  1. A data input module for inputting data by means of electrical contact for a monitoring/control module, the module comprising:
    a) a first voltage feed input (1) and a second voltage feed input (2), which inputs are intended to be subjected to a potential difference which is optionally variable;
    b) a plurality of contacts (3) each of which has a first terminal (4) electrically connected to said first input via a first resistor (14), and a second terminal (5) electrically connected to said second input (2), each contact being designed to open or to close an electric current path between its terminals when it is actuated;
    c) a plurality of detection members (7) respectively associated with said contacts (3), each detection member being organized to detect the presence or the absence of an electric current flowing between the terminals of the contact with which the detection member is associated, and to respond to the contact being actuated by producing a signal representing data input;
    d) a voltage regulator (10) electrically connected to the two feed inputs (1, 2) and having an output (11) which supplies a regulated voltage to the detection members, each detection member being electrically connected to the first terminal (4) of the contact with which the detection member is associated; and
    e) a test circuit (8, 9) for testing operation of the detection members, which circuit is interposed firstly between the output (11) of the regulator and each detection member (7), and secondly between each detection member (7) and the second feed input (2), the circuit being intended both to feed said contacts via the detection members, and also to short-circuit them.
  2. A module according to claim 1, in which the circuit comprises:
    a) a first test component (8) interposed between the output (11) of the voltage regulator and each detection member (7), the first test component having a first state in which the output of the regulator is electrically connected to each detection member, and a second state in which the output of the regulator is electrically isolated from each detection member; and
    b) a second test component (9) interposed between each detection member (7) and the second feed input (2), the second test component having a first state in which each detection member is electrically connected to the second feed input, and a second state in which each detection member is electrically isolated from the second feed input.
  3. A module according to claim 2, in which each detection member associated with a contact is electrically connected firstly to the first terminal (4) of the contact via a resistor (15) and via a first diode (13), and secondly to the second feed input (2) via said resistor (15), via a second diode (16) and via the second test component (9).
EP93400762A 1992-03-26 1993-03-24 Information input module with electrical contacts for command- and control-installations Expired - Lifetime EP0562959B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9203649A FR2689258B1 (en) 1992-03-26 1992-03-26 INFORMATION INPUT MODULE BY ELECTRIC CONTACT, FOR CONTROL / CONTROL INSTALLATION.
FR9203649 1992-03-26

Publications (2)

Publication Number Publication Date
EP0562959A1 EP0562959A1 (en) 1993-09-29
EP0562959B1 true EP0562959B1 (en) 1996-04-24

Family

ID=9428100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400762A Expired - Lifetime EP0562959B1 (en) 1992-03-26 1993-03-24 Information input module with electrical contacts for command- and control-installations

Country Status (6)

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US (1) US5382907A (en)
EP (1) EP0562959B1 (en)
JP (1) JP2618176B2 (en)
DE (1) DE69302314T2 (en)
ES (1) ES2085733T3 (en)
FR (1) FR2689258B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5729167A (en) * 1996-02-01 1998-03-17 Motorola, Inc. Low power consumption switch interface circuit
FR2831893B1 (en) * 2001-11-07 2004-07-16 Leroy Automatique Ind ACTIVE DEVICE WITH REDUCED DISSIPATION FOR ELECTRICAL CIRCUITS, ESPECIALLY AN AUTOMATON OR AN INDUSTRIAL COMPUTER
US10217573B2 (en) 2014-07-18 2019-02-26 Ge Intelligent Platforms, Inc. Universal contact input supporting programmable wetting current

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900628A (en) * 1956-01-27 1959-08-18 Westinghouse Electric Corp Multiple fault indicating system
US3021515A (en) * 1957-11-27 1962-02-13 Allis Chalmers Mfg Co Fault indicator
US3239755A (en) * 1962-01-12 1966-03-08 Western Electric Co Test circuitry for testing electrical apparatus for continuity of circuitry between terminals therein
US3611364A (en) * 1969-02-05 1971-10-05 Pillsbury Co Apparatus for determining the sequence of circuit discontinuities in a sealing circuit for a power output device
DE2046897A1 (en) * 1970-09-23 1972-04-06 Siemens Ag Circuit arrangement for improving the switching behavior of a low-voltage contact
FR2521771A1 (en) * 1982-02-12 1983-08-19 Telemecanique Electrique CONTROL CONTACT POWER SUPPLY CIRCUIT AND ITS APPLICATION TO CONTROL RELAY REST TIMING
US4532466A (en) * 1982-08-16 1985-07-30 The Babcock & Wilcox Company Constant current source for field contact input
US4854165A (en) * 1987-06-01 1989-08-08 Danford A. Jay Apparatus for testing electrical components
JPH03188794A (en) * 1989-12-18 1991-08-16 Nec Corp Monitor controller and its monitor method

Also Published As

Publication number Publication date
DE69302314D1 (en) 1996-05-30
EP0562959A1 (en) 1993-09-29
JPH06118109A (en) 1994-04-28
ES2085733T3 (en) 1996-06-01
US5382907A (en) 1995-01-17
FR2689258A1 (en) 1993-10-01
DE69302314T2 (en) 1996-09-12
JP2618176B2 (en) 1997-06-11
FR2689258B1 (en) 1996-12-13

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