EP2099048B1 - Commande de sécurité modulaire et module de relais de sécurité - Google Patents

Commande de sécurité modulaire et module de relais de sécurité Download PDF

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Publication number
EP2099048B1
EP2099048B1 EP08102402A EP08102402A EP2099048B1 EP 2099048 B1 EP2099048 B1 EP 2099048B1 EP 08102402 A EP08102402 A EP 08102402A EP 08102402 A EP08102402 A EP 08102402A EP 2099048 B1 EP2099048 B1 EP 2099048B1
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EP
European Patent Office
Prior art keywords
safety
relay module
contact
safety relay
relay
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.)
Active
Application number
EP08102402A
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German (de)
English (en)
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EP2099048A1 (fr
EP2099048B2 (fr
Inventor
Franz Josef Dold
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
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Sick AG
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=39671438&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2099048(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sick AG filed Critical Sick AG
Priority to AT08102402T priority Critical patent/ATE469432T1/de
Priority to DE502008000712T priority patent/DE502008000712D1/de
Priority to EP08102402.8A priority patent/EP2099048B2/fr
Publication of EP2099048A1 publication Critical patent/EP2099048A1/fr
Publication of EP2099048B1 publication Critical patent/EP2099048B1/fr
Application granted granted Critical
Publication of EP2099048B2 publication Critical patent/EP2099048B2/fr
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/14—Terminal arrangements

Definitions

  • the invention relates to an arrangement of safety relay modules for fail-safe switching of relays according to the preamble of claim 1 and a safety relay module for such a modular arrangement.
  • a safety switching device is a device that receives supplied input signals from signal generators, such as emergency stop buttons, safety door switches, light barriers or light grids, and generates output signals directly or after logic operations. The output signals can then be supplied to actuators, which cause specific actions or reactions in the environment depending on the input signals, eg. B. to a machine, such as a press or a welding robot, emanating from the operation of a danger to people to hedge.
  • signal generators such as emergency stop buttons, safety door switches, light barriers or light grids
  • the output signals can then be supplied to actuators, which cause specific actions or reactions in the environment depending on the input signals, eg. B. to a machine, such as a press or a welding robot, emanating from the operation of a danger to people to hedge.
  • a signal generator z. B. when opening the protective door, pressing the emergency stop button or when a sensor responds, a signal is generated in each case, which is supplied to the safety switching device as an input signal.
  • the safety switching device then shut
  • a safety relay In contrast to a "normal" safety relay, a safety relay is characterized by the fact that the safety relay with its components must always ensure a safe state of the hazardous equipment or machine even if a malfunction occurs in the safety equipment itself or in a device connected to it. Therefore, in safety switching devices and their components extremely high demands are made on their own fault tolerance, which has a considerable effort in the development and production result. In general, not only the safety relays alone require special approval by competent supervisory authorities, such as professional associations or TÜV, but also in combination with a machine equipped with the safety relay.
  • the safety relay with its components, such as safety relays must comply with given safety standards, which are defined, for example, in the European standard EN 954-1 or ISO 13849 (performance level). The possible safety levels and the additional safety requirements for an application are defined in the standard EN 61508 or EN 62061.
  • the product standard EN 61496-1 applies to the connected signalers, which also defines monitoring signal feedback, the so-called “electronic device monitoring”, also called EDM.
  • Fig. 7 Such a contact multiplication according to the prior art is shown.
  • the reference numerals in this description are chosen such that the digit in front of a hyphen indicates the respective component of a module and the digit after the hyphen numbers the relay module.
  • An "x" after a hyphen serves as a placeholder for each relay module, meaning that a reference is made to all similar components, regardless of which module they are in.
  • the Fig. 7 shows a block diagram of an arrangement 10 of two safety relay modules 12-x, each of which has two channels and positively driven relays 16-x, 18-x have.
  • Each relay has two control contacts 20-x and 22-x or 24-x and 26-x, one of which is connected to a ground potential.
  • the two-channel, actual safety switching signal OSSD_1 (first channel) and OSSD_2 (second channel) is provided, which is provided by suitable signal generators, as described above.
  • Each relay module has two make contacts 28-x, 30-x and two openers 32-x, 34-x with switch contacts 36-x and 38-x and 40-x and 42-x, with the make contacts connected in series, see above that the 24 V feedback signal for device control EDM is guided via the make contacts by means of feedback circuit terminals 44-x and 46-x.
  • control contacts For contact multiplication, the control contacts must now be connected in parallel by the terminals 22-1 and 22-2 and 26-1 and 26-2 are to be connected to each other via separate lines 23 and 25. Since the feedback circuit must be guided by each relay, all NO must be connected in series, including the terminals 44-1 and 44-2 must be connected to each other via a separate line 45 and the return signal of 24 V to the terminal 46-2 must be rewired.
  • a contact multiplication at a single terminal at least two wires connected, which is not only cumbersome to handle, but represents another security risk.
  • the connecting terminals must be dimensioned or designed in such a way that they can accommodate two wires. But fixing two wires in a clamp can be a safety hazard since two wires in a clamp are never as secure as just one.
  • a modular arrangement with at least two safety relay modules for switching safety switch contacts, being connected in parallel for switching switching control contacts of the first relay module with control contacts of the second relay module and each relay module containing the safety relay or the housing and corresponding control contact terminals and switching contact terminals are arranged.
  • the invention for contact multiplication in addition to the terminals at least one contact plug on the respective safety relay modules for connection of the control contacts of the adjacent two safety relay modules arranged.
  • the invention is thus already represented by a safety relay module for such a modular safety control, wherein at least one extra contact plug for connecting the control contacts with an adjacent second relay module is arranged for contact multiplication in addition to the existing terminals for control and switching contacts.
  • contact plug means that the connection of the control contacts via a plug connection, so that with this term both a plug part and a socket part of a plug connection may be meant.
  • the main advantages of the invention are that on the one hand the cabling effort in the contact multiplication is significantly reduced and the other is that the contact multiplication handling and thus the installation is considerably simplified, because there are no longer individual wires from the terminals of a relay module be moved to the terminals of the other relay module with the aforementioned disadvantages, but it is only the contact plug to plug.
  • the contact multiplication with the invention has not only become simpler and safer, but also cheaper.
  • the flexibility is obtained, namely instead of a relay module with a plurality of switching contacts now provide several relay modules according to the invention, the switching contacts are multiplied as needed, so how only one relay with an application adapted number of switching contacts act.
  • the safety relay module preferably has a feedback circuit (EDM) with a feedback contact.
  • EDM feedback circuit
  • the return contact must be wired according to correct in the contact multiplication, which can be done automatically by the contact plug, especially when the contact plug and a pole of the return contact is performed.
  • the invention shows the advantages of the reduced wiring complexity, in particular when the safety relay is an at least two-channel, positively driven relay, since the amount of wiring would increase correspondingly with the number of relays without the inventive design.
  • the contact multiplication is carried out automatically by plugging the relay modules into a row.
  • a contact plug is arranged in a further development of the invention on both sides of the housing.
  • the contact plug can be arranged on the front, top, bottom or rear of the housing of the relay module, whereby a contact multiplication via cables that can be plugged into the contact plug, is possible, so that the relay modules can also be present remote from each other.
  • the replacement of modules or the expansion of the module series is facilitated if the modules have similar housing.
  • the housing is designed as a standard IP20 housing.
  • Fig. 1 shows an inventive arrangement 110 of two inventive safety relay modules 112-1 and 112-2, which in the Fig. 1 are shown spaced apart to illustrate the connection between them explained below.
  • the reference numerals are chosen with the same regulation, as already mentioned above in connection with the prior art ( Fig. 7 ).
  • the safety relay modules 112-x have a housing 114-x, and control contact terminals 120-x and 122-x or 126x and switch contact terminals 136-x, 138-x, 140-x and 142-x for at least one safety Relay that in the view Fig. 1 is not recognizable but will be explained below. Furthermore, two terminals 144-x and 146-x are arranged for a return contact of a feedback loop.
  • At least one contact plug 150-1 is additionally arranged on the housing 114-1, and a contact plug 150-2 on the housing 114-2.
  • the control contacts of the adjacent relays are connected to each other, so that a switching contact multiplication is given, as described below with reference to FIG. 4 is explained in detail.
  • the contact plugs 150-x and 151-x are in the first, in Fig. 1 illustrated embodiment on the front side of the housing 114-x arranged and connected to each other via a connecting cable 152.
  • the contact plug could alternatively be arranged on the sides or on the top or bottom.
  • control contacts are connected to each other via the connection thus made, but also the return circuits of the adjacent ones Relay Modules.
  • the detailed interconnection is explained below using block diagrams.
  • the contact plugs 150-x and 151-x are disposed on both sides of the housing, on one side of the housing (left side in the drawing) the contact plug 151-x as a plug part and on the other side (In the drawing, the right side) is designed as a socket part, so that the contact is multiplied by simply joining or mating adjacent relay modules.
  • Fig. 3 shows the block diagram of a first embodiment of the safety relay module 112-x with two positively driven relay 116-x and 118-x, which are controlled via control contacts 120-x and 122-x and 126-x.
  • the safety control signals come, for example, from a signal generator 200, not shown, which supplies two redundant safety signals OSSD_1 and OSSD_2.
  • Each relay has a normally open contact and a normally closed contact, with the normally open contacts of the two relays connected in series via a connection line 119-x, to provide a feedback loop with feedback contacts 144-x in 146-x for checking (Electronic Device Monitoring, abbreviated to EDM) connected signal generator and the relay.
  • EDM Electronic Device Monitoring
  • more than one closer for example, two may be assigned to a relay, so that two parallel closer paths are given. Then must be connected via two parallel connecting lines, the normally open one relay to the normally open relay of the other relay, so that in each case two make different relays are connected in series. This then provides two parallel feedback circuits, both of which can be controlled by each relay. This is useful, for example, for higher security requirements.
  • contacts 120-x, 122-x and 126-x are routed to contact plugs 150-x and 151-x by the switch contacts.
  • the return contact 144-x on the contact plug 150-x and the return contact 146-x on the contact plug 151-x out.
  • switching contact multiplication can be easily established by connecting two adjacent safety relay modules 112-1 and 112-2 via their contact plugs 150-1 and 151-2, as shown in FIG Fig. 4 is shown. Then, the control contacts of respective relays 116-1 and 116-2 and 118-1 and 118-2 are connected to each other. Also, then the feedback circuits of both relay modules are connected in series and device control only the 24 V signal for the feedback loop must be rewired from the return contact 144-1 of the first relay module 112-1 on the return contact 144-2 of the second relay module 112-2.
  • relay modules according to the invention can be cascaded for contact multiplication, even if they are of a single-channel design, as shown in FIG Fig. 5 is shown.
  • relay modules according to the invention can be cascaded for contact multiplication, even if they are of a single-channel design, as shown in FIG Fig. 5 is shown.
  • two slightly different single-channel safety relay modules 160-x and 162-x must be provided.
  • These single-channel safety relay modules according to the invention differ only in that they each have two switching paths 164 and 166, whereby one of the switching paths (in module 160-x this is the switching path 164 and in module 162-x this is the switching path 166) the respective relay module is guided directly from one contact plug 171-1 to the other contact plug 170-1 and the other switching path comprises the respective switching contact 122-1 or 126-1.
  • respective relay modules 160-1 and 160-2 as well as 162-1 and 162-2 are interconnected with respect to the switching paths, so that the relays 160-1 and 160-2, as well as the safety relays 162- 1 and 162-2, switch simultaneously.
  • a simple signaling contact 180 can also be connected via the contact plug to a safety relay module 112-x according to the invention, as in FIG Fig. 6 shown, with a simple signal contact no feedback required and therefore a corresponding bypass line 184 is guided by contact plug 191 to the other contact plug 190.
  • the signaling contact responds to the OSSD_1 or OSSD_2 signal.
  • Each module can be housed in a similar housing.
  • the housing can be an IP20 housing system.
  • the housing may also be designed in a higher protection class, such as, for example, IP65.

Claims (10)

  1. Agencement (110) comprenant au moins deux modules de relais de sécurité (112-1, 112-2) pour la commutation de contacts de commutateur de sécurité, dans lequel pour multiplier le nombre de contacts de commutateur, des contacts de commande du premier module de relais sont branchés en parallèle avec des contacts de commande du second module de relais, et chaque module de relais comprend un boîtier (114-x) qui contient le ou les relai(s) de sécurité, et dans lequel sont agencées des bornes de raccordement pour contacts de commande (120-x, 122-x, 126-x) et des bornes de raccordement pour contacts de commutateur (136-x, 138-x, 140-x, 142-x), caractérisé en ce que pour multiplier le nombre de contacts de commutateur, au moins une fiche de contact (150-x, 151-x) est agencée en supplément sur le module de relais de sécurité respective (112-1, 112-2) pour la connexion des contacts de commande des deux modules de relais de sécurité voisins.
  2. Module de relais de sécurité pour un agencement modulaire (110) selon la revendication 1, comprenant un boîtier (114-x) contenant au moins un relais de sécurité, et comprenant des bornes de raccordement pour contacts de commande (120-x, 122-x, 126-x) et des bornes de raccordement pour contacts de commutateur (136-x, 138-x, 140-x, 142-x), caractérisé en ce que pour multiplier le nombre de contacts de commutateur il est prévu additionnellement au moins une fiche de contact (150-x, 151-x) pour la connexion des contacts de commande avec un second module de relais voisin.
  3. Module de relais de sécurité selon la revendication 2, caractérisé en ce que le module de relais comprend un circuit de retour (EDM) avec un contact de retour.
  4. Module de relais de sécurité selon la revendication 3, caractérisé en ce qu'un pôle du contact de retour est également mené sur la fiche de contact.
  5. Module de relais de sécurité selon l'une des revendications précédentes, caractérisé en ce que le relais de sécurité est un relais à au moins deux canaux et à guidage forcé.
  6. Module de relais de sécurité selon l'une des revendications précédentes, caractérisé en ce que la fiche de contact est agencée latéralement sur le boîtier du module de relais.
  7. Module de relais de sécurité selon la revendication 6, caractérisé en ce qu'une fiche de contact est agencée sur les deux côtés du boîtier.
  8. Module de relais de sécurité selon l'une des revendications précédentes, caractérisé en ce que la fiche de contact est agencée du côté frontal, du côté supérieur, du côté inférieur ou du côté dorsal sur le boîtier du module de relais.
  9. Module de relais de sécurité selon l'une des revendications précédentes, caractérisé en ce que la fiche de contact est un élément constitutif intégral d'une jonction électrique à enfichage entre des modules voisins.
  10. Agencement de module de relais de sécurité selon l'une des revendications précédentes, caractérisé en ce que les boîtiers des modules sont réalisés de même type, en particulier sous forme de boîtiers standardisés, par exemple d'après la classe de protection IP20.
EP08102402.8A 2008-03-07 2008-03-07 Commande de sécurité modulaire et module de relais de sécurité Active EP2099048B2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT08102402T ATE469432T1 (de) 2008-03-07 2008-03-07 Modulare sicherheitssteuerung und sicherheits- relaismodul
DE502008000712T DE502008000712D1 (de) 2008-03-07 2008-03-07 Modulare Sicherheitssteuerung und Sicherheits-Relaismodul
EP08102402.8A EP2099048B2 (fr) 2008-03-07 2008-03-07 Commande de sécurité modulaire et module de relais de sécurité

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08102402.8A EP2099048B2 (fr) 2008-03-07 2008-03-07 Commande de sécurité modulaire et module de relais de sécurité

Publications (3)

Publication Number Publication Date
EP2099048A1 EP2099048A1 (fr) 2009-09-09
EP2099048B1 true EP2099048B1 (fr) 2010-05-26
EP2099048B2 EP2099048B2 (fr) 2019-03-06

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ID=39671438

Family Applications (1)

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EP08102402.8A Active EP2099048B2 (fr) 2008-03-07 2008-03-07 Commande de sécurité modulaire et module de relais de sécurité

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EP (1) EP2099048B2 (fr)
AT (1) ATE469432T1 (fr)
DE (1) DE502008000712D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11137727B2 (en) 2019-04-04 2021-10-05 Swivel-Link, LLC Validation device for testing a machinery safety system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3830742A1 (de) * 1988-09-09 1990-03-22 Elan Schaltelemente Gmbh Sicherheitsschaltung
DE10045651B4 (de) * 2000-09-15 2007-08-02 Pilz Gmbh & Co. Kg Sicherheitsschaltgerät

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11137727B2 (en) 2019-04-04 2021-10-05 Swivel-Link, LLC Validation device for testing a machinery safety system

Also Published As

Publication number Publication date
EP2099048A1 (fr) 2009-09-09
EP2099048B2 (fr) 2019-03-06
ATE469432T1 (de) 2010-06-15
DE502008000712D1 (de) 2010-07-08

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