DE102012008543A1 - Switch device for monitoring closing position of floor door, has actuator tuning coil to resonance in closed state of protective unit, where quality of resonance characteristic is tuned coil such that resonance frequency is tolerated - Google Patents

Switch device for monitoring closing position of floor door, has actuator tuning coil to resonance in closed state of protective unit, where quality of resonance characteristic is tuned coil such that resonance frequency is tolerated Download PDF

Info

Publication number
DE102012008543A1
DE102012008543A1 DE201210008543 DE102012008543A DE102012008543A1 DE 102012008543 A1 DE102012008543 A1 DE 102012008543A1 DE 201210008543 DE201210008543 DE 201210008543 DE 102012008543 A DE102012008543 A DE 102012008543A DE 102012008543 A1 DE102012008543 A1 DE 102012008543A1
Authority
DE
Germany
Prior art keywords
resonance
switching device
coil
actuator
quality
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.)
Withdrawn
Application number
DE201210008543
Other languages
German (de)
Inventor
Hermann Hoepken
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.)
KA Schmersal GmbH and Co KG
Original Assignee
KA Schmersal GmbH and Co KG
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 KA Schmersal GmbH and Co KG filed Critical KA Schmersal GmbH and Co KG
Priority to DE201210008543 priority Critical patent/DE102012008543A1/en
Publication of DE102012008543A1 publication Critical patent/DE102012008543A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/965—Switches controlled by moving an element forming part of the switch
    • H03K17/97—Switches controlled by moving an element forming part of the switch using a magnetic movable element
    • H03K2017/9706—Inductive element

Abstract

The device has two legs (2, 3) and a coil wrapped around one of the legs. A U-shaped ferrite core (1) and an actuator (4) are resiliently supported. The actuator operates the device on two surfaces of the legs according to an electromagnetic effect principle. The actuator tunes the receiving coil to resonance in a closed state of an access protective unit. Quality of resonance characteristic is tuned through a resistor (8) over the receiving coil such that resonance frequency changed by an expected contamination of inductive coupling points (7) is tolerated.

Description

Allgemeines zum bekannten Stand der TechnikGeneral to the known prior art

Zur Überwachung des Zustandes von Türen, z. B. Stockwerkstüren in Aufzügen werden i. d. R. herkömmliche Schalter mit mechanischen Kontakten eingesetzt wie sie z. B. aus der Patentschrift DE 29 162 79 C2 bekannt sind. Weiterhin bekannt sind magnetisch betätigbare Schalter die mittels Hallsensoren oder Reedkontakten ein entsprechendes Schaltsignal erzeugen. Auch bekannt sind Schalteinrichtungen mit einem nicht elektrischen Wirkprinzip die mittels optischer Signale bestimmte Schaltzustände erzeugen können. Eine solche Vorrichtung ist beispielsweise aus der EP 0 647 584 B1 bekannt.To monitor the condition of doors, z. B. storey doors in elevators are usually used conventional switches with mechanical contacts such as z. B. from the patent DE 29 162 79 C2 are known. Also known are magnetically actuated switches which generate a corresponding switching signal by means of Hall sensors or reed contacts. Also known are switching devices with a non-electrical operating principle that can generate certain switching states by means of optical signals. Such a device is for example from the EP 0 647 584 B1 known.

Nachteile des bekannten Standes der TechnikDisadvantages of the known prior art

Mechanische Schaltkontakte unterliegen je nach Einsatz einem erhöhten Verschleiß. So können Verunreinigungen oder aggressive Umwelteinflüsse wie z. B. sehr feuchte Luft oder ätzende Atmosphären (stark salzhaltige Luft o. ä.) einen erhöhten mechanischen Verschleiß zur Folge haben.Mechanical switching contacts are subject to increased wear depending on the application. So impurities or aggressive environmental influences such. B. very humid air or corrosive atmospheres (high salty air o. Ä.) Have an increased mechanical wear result.

Bei Schaltern mit einem optischen Wirkprinzip kann die Verschmutzung der Optik zum Problem werden. Weiterhin müssen Maßnahmen getroffen werden, die eine Fehlinterpretation von externen Lichtquellen vermeidet.For switches with an optical operating principle, the contamination of the optics can be a problem. Furthermore, measures must be taken to avoid misinterpretation of external light sources.

In einem Umfeld in dem zum Beispiel durch große Maschinen externe große Magnetfelder erzeugt werden, kann es bei Hall Sensoren falschen Schaltsignalen kommen.In an environment in which external large magnetic fields are generated by large machines, for example, wrong switching signals can occur with Hall sensors.

Ebenfalls problematisch kann der Einsatz von Reed Kontakten sein, die durch starke Erschütterungen wie sie beim Betrieb einer Maschine oder durch das Zuschlagen einer Zugangsschutzeinrichtung entstehen kann ein falsches Schaltsignal erzeugen können.Also problematic may be the use of reed contacts that can cause a false switching signal due to strong vibrations such as those that occur during operation of a machine or by slamming an access guard.

All diese Nachteile können für erhöhte Ausfallzeiten der Schalteinrichtungen und damit zum Ausfall/Stillstand der Gefahrenbringenden Anlage führen. Dies hat einen erhöhten Wartungsaufwand insbesondere erhöhte Wartungskosten zur Folge.All these disadvantages can lead to increased downtime of the switching devices and thus to the failure / stoppage of the hazardous system. This has an increased maintenance, in particular increased maintenance costs result.

Aufgabe der ErfindungObject of the invention

Aufgabe der Erfindung ist es eine Vorrichtung nach den Merkmalen des Anspruchs 1 zur Verfügung zu stellen, die unempfindlich gegenüber den o. g. Umgebungseinflüssen wie z. B. aggressiver Atmosphären, Wassereintritt oder mechanischem Verschleiß ist.The object of the invention is to provide a device according to the features of claim 1 which are insensitive to the o. G. Environmental influences such. B. aggressive atmospheres, water ingress or mechanical wear.

Lösung der AufgabeSolution of the task

Die Aufgabe wird durch eine Vorrichtung mit den Merkmalen des Anspruchs 1 gelöst.The object is achieved by a device having the features of claim 1.

Vorteile der ErfindungAdvantages of the invention

Die Vorteile der Erfindung liegen im Wesentlichen in der Unempfindlichkeit gegenüber Umwelteinflüssen wie z. B. feuchte Luft, ätzende Atmosphären o. ä.The advantages of the invention are essentially in the insensitivity to environmental influences such. As humid air, corrosive atmospheres o. Ä.

Durch die Ausgestaltung des Türkontaktes nach dem elektromagnetischen Wirkprinzip besitzt der der Türkontakt keine verschleißbehafteten Kontaktelemente. Ebenso besitzt der Türkontakt keine elektromagnetisch beeinflussbaren Sensoren, die durch Einwirkung von großen Magnetfeldern falsche Schaltsignale liefern könnten. Auch ein falsches Schaltsignal durch Vibrationen oder heftige Stöße können nicht auftreten die in Folge von z. B. dem Betrieb einer Maschine entstehen.Due to the design of the door contact according to the electromagnetic action principle of the door contact has no wear-prone contact elements. Likewise, the door contact has no electromagnetically modifiable sensors that could deliver wrong switching signals by the action of large magnetic fields. Even a wrong switching signal due to vibrations or violent shocks can not occur as a result of z. B. the operation of a machine arise.

Ausführungsbeispiel der Erfindung sind in den Zeichnungen dargestellt und werden im Folgenden näher beschrieben.Embodiment of the invention are illustrated in the drawings and will be described in more detail below.

1: Die 1 zeigt eine perspektivische schematische Ansicht der neuartigen Schalteinrichtung. 1 : The 1 shows a perspective schematic view of the novel switching device.

2: 2 zeigt einen Schnitt des neuartigen Türkontaktes nebst Betätigerelement. 2 : 2 shows a section of the novel door contact together with actuator element.

3: 3 zeigt die neuartige Schalteinrichtung mit entsprechender Beschaltung. 3 : 3 shows the novel switching device with appropriate circuitry.

4a: 3a zeigt das Resonanzverhalten des neuartigen Türkontaktes im geöffneten zustand. 4a : 3a shows the resonance behavior of the new door contact in the open state.

4b: 3b zeigt das Resonanzverhalten des neuartigen Türkontaktes im geschlossenen Zustand. 4b : 3b shows the resonance behavior of the novel door contact in the closed state.

4c: 3c zeigt das Resonanzverhalten des neuartigen Türkontaktes im Falle eines Bruches des Betätigers bzw. des Ferrits. 4c : 3c shows the resonance behavior of the novel door contact in the event of breakage of the actuator or the ferrite.

Eine bevorzugte Ausgestaltung der erfindungsgemäßen Schaltvorrichtung sieht vor, dass um einen federnd gelagerten U förmigen Ferritkern (1) um dessen beide Schenkel je eine Sendespule und eine auf Resonanz abgestimmte Empfangsspule gewickelt ist.A preferred embodiment of the switching device according to the invention provides that a spring-mounted U-shaped ferrite core ( 1 ) around each of which two legs a transmitting coil and a resonant receiving coil is wound.

In einer weiteren bevorzugten Ausführungsart ist es vorgesehen, dass Sende- und Empfangsspule auf dem selben Schenkel angeordnet um einen der beiden Schenkel entweder (2) oder (3) gewickelt ist.In a further preferred embodiment, it is provided that the transmitting and receiving coil arranged on the same leg about one of the two legs either ( 2 ) or ( 3 ) is wound.

In einer anderen bevorzugten Ausführungsform kann die Funktion der Sende- und Empfangsspule auch durch eine um einen der beiden Schenkel (2) oder (3) gewickelten Spule übernommen werden. Der Betätiger (2), eine Platte aus Ferrit, wird zur Betätigung auf die beiden Schenkel (2, 3) des aus dem Schaltergehäuse (5) ragenden U Kerns (1) aufgelegt und stimmt dabei die Empfangsspule auf Resonanz ab. In another preferred embodiment, the function of the transmitting and receiving coil by one of the two legs ( 2 ) or ( 3 ) wound coil can be taken. The actuator ( 2 ), a plate of ferrite, is used to operate on the two legs ( 2 . 3 ) of the switch housing ( 5 ) U core ( 1 ) and tunes the receiver coil to resonance.

Die Güte der Resonanzkurve wird durch einen zusätzlichen Widerstand (8) über die Empfangsspule so abgestimmt, dass die durch eine zu erwartende Verschmutzung der induktiven Koppelungsstelle (7, 8) veränderte Resonanzfrequenz noch toleriert wird.The quality of the resonance curve is enhanced by an additional resistance ( 8th ) so matched via the receiving coil, that by an expected pollution of the inductive coupling point ( 7 . 8th ) changed resonant frequency is still tolerated.

Die Empfangsspule kann nun das von der Sendespule erzeugte, zur Sicherheit mit einer Kodierung versehene Signal, empfangen, wenn die Ferritplatte des Betätigers (4) in einem hinreichend engen Kontakt mit dem Ferritkern (1, 2, 3) des Schaltergehäuses kommt.The receiver coil can now receive the signal generated by the transmitter coil for security with a coding, when the ferrite plate of the actuator ( 4 ) in a sufficiently close contact with the ferrite core ( 1 . 2 . 3 ) of the switch housing comes.

Der bei der Betätigung notwendige Überhub wird durch die federnde Lagerung eines oder beider Ferritformteile erreicht. Die Fehlertoleranz gegen Verschmutzung und seitliche Verschiebungen in zwei Dimensionen wird durch eine geeignet große Auslegung der Ferritplatte im Betätiger (4) erreicht. Die notwendige Fehleraufdeckung wird durch eine hohe Dynamisierung der induktiven Koppelstrecke erreicht.The necessary override during operation is achieved by the resilient mounting of one or both ferrite moldings. The fault tolerance against contamination and lateral displacements in two dimensions is ensured by a suitably large dimensioning of the ferrite plate in the actuator ( 4 ) reached. The necessary fault detection is achieved by a high degree of dynamization of the inductive coupling path.

Durch eine Ansteuerung der Sendespule mit der Frequenz, die zur Resonanz der Empfangsspule ohne den geschlossenen Magnetkreis durch den ferritischen Betätiger (4) führt, ist eine Testung des Schalters auch im geöffneten unbetätigten Zustand jederzeit möglich.By controlling the transmitter coil with the frequency that resonates the receiver coil without the closed magnetic circuit through the ferritic actuator ( 4 ), a test of the switch is also possible in the open unoperated state at any time.

ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION

Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Zitierte PatentliteraturCited patent literature

  • DE 2916279 C2 [0001] DE 2916279 C2 [0001]
  • EP 0647584 B1 [0001] EP 0647584 B1 [0001]

Claims (9)

Die Erfindung betrifft eine Schalteinrichtung zum überwachen der Schließstellung einer Zugangsschutzeinrichtung, dadurch gekennzeichnet, dass die Schalteinrichtung nach dem elektromagnetischen Wirkprinzip arbeitet.The invention relates to a switching device for monitoring the closed position of an access protection device, characterized in that the switching device operates on the principle of electromagnetic action. Schalteinrichtung nach Anspruch 1, dadurch gekennzeichnet, dass um mindestens einen der beiden Schekel (2, 3) wenigstens eine Spule gewickelt ist.Switching device according to claim 1, characterized in that around at least one of the two shekels ( 2 . 3 ) at least one coil is wound. Schalteinrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der U-förmige Ferritkern (1) federnd gelagert ist.Switching device according to one of the preceding claims, characterized in that the U-shaped ferrite core ( 1 ) is spring-mounted. Schalteinrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Betätiger (4) federnd gelagert ist.Switching device according to one of the preceding claims, characterized in that the actuator ( 4 ) is spring-mounted. Schalteinrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Betätiger (4) zur Betätigung der Schalteinrichtung auf die beiden aus dem Schaltergehäuse (5) ragenden flächen (7, 8) der Schenkel (2, 3) aufgelegt wird.Switching device according to one of the preceding claims, characterized in that the actuator ( 4 ) for actuating the switching device on the two of the switch housing ( 5 ) projecting surfaces ( 7 . 8th ) of the thighs ( 2 . 3 ) is launched. Schalteinrichtung nach Anspruch 4, dadurch gekennzeichnet, dass der Betätiger (4) im geschlossenen Zustand der Zugangsschutzeinrichtung die Empfangsspule auf Resonanz abstimmt.Switching device according to claim 4, characterized in that the actuator ( 4 ) in the closed state of the access protection device tunes the receiver coil to resonance. Schalteinrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass die Güte der Resonanzkurve durch mindestens einen Widerstand (8) über die Empfangsspule so abgestimmt ist, dass durch eine zu erwartende Verschmutzung der induktiven Koppelstellen (7, 8) veränderte Resonanzfrequenz noch toleriert wird.Switching device according to one of the preceding claims, characterized in that the quality of the resonance curve by at least one resistor ( 8th ) is tuned via the receiving coil so that by an expected contamination of the inductive coupling points ( 7 . 8th ) changed resonant frequency is still tolerated. Schalteinrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das von der Sendespule erzeugte Signal, mit einer Codierung versehen ist.Switching device according to one of the preceding claims, characterized in that the signal generated by the transmitting coil is provided with a coding. Schalteinrichtung nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass durch eine Ansteuerung der Sendespule mit einer Frequenz, die zur Resonanz der Empfangsspule führt, ein Test der Schalteinrichtung auch im geöffneten Zustand der Zugangschutzeinrichtung möglich ist.Switching device according to one of the preceding claims, characterized in that by a control of the transmitting coil with a frequency which leads to the resonance of the receiving coil, a test of the switching device is also possible in the open state of the access protection device.
DE201210008543 2012-05-02 2012-05-02 Switch device for monitoring closing position of floor door, has actuator tuning coil to resonance in closed state of protective unit, where quality of resonance characteristic is tuned coil such that resonance frequency is tolerated Withdrawn DE102012008543A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE201210008543 DE102012008543A1 (en) 2012-05-02 2012-05-02 Switch device for monitoring closing position of floor door, has actuator tuning coil to resonance in closed state of protective unit, where quality of resonance characteristic is tuned coil such that resonance frequency is tolerated

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201210008543 DE102012008543A1 (en) 2012-05-02 2012-05-02 Switch device for monitoring closing position of floor door, has actuator tuning coil to resonance in closed state of protective unit, where quality of resonance characteristic is tuned coil such that resonance frequency is tolerated

Publications (1)

Publication Number Publication Date
DE102012008543A1 true DE102012008543A1 (en) 2013-11-07

Family

ID=49384270

Family Applications (1)

Application Number Title Priority Date Filing Date
DE201210008543 Withdrawn DE102012008543A1 (en) 2012-05-02 2012-05-02 Switch device for monitoring closing position of floor door, has actuator tuning coil to resonance in closed state of protective unit, where quality of resonance characteristic is tuned coil such that resonance frequency is tolerated

Country Status (1)

Country Link
DE (1) DE102012008543A1 (en)

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762105A1 (en) * 1968-04-06 1970-04-16 Bosch Gmbh Robert Contactless switching device
DE2042982A1 (en) * 1970-08-29 1972-03-09 Bosch Gmbh Robert Switching device for contactless signal transmission with proximity switches tuned to different frequencies
DE2644714A1 (en) * 1975-10-04 1977-04-14 Wickman Mach Tool Sales Ltd SAFETY DEVICE
DE2718459A1 (en) * 1977-04-26 1978-11-02 Licentia Gmbh Automatic proximity detector for railway wheels - is for railway traffic control and is stable under diverse conditions
DE3643589A1 (en) * 1986-12-19 1987-05-27 Siemens Ag Circuit arrangement for reducing the temperature coefficient in inductive proximity switches
DE2916279C2 (en) 1979-04-21 1987-07-23 Thyssen-M.A.N. Aufzuege Gmbh, 7303 Neuhausen, De
DE4233325A1 (en) * 1992-10-05 1994-04-28 Ifm Electronic Gmbh Inductive proximity switch for e.g. electronic control circuit - has sensor coil and sensor inductance having U-shaped ferrite core with square shaped base
DE29710694U1 (en) * 1997-06-19 1997-09-11 Huber Peter Dipl Ing Fh Proximity switch with data transmission via an electromagnetic field
EP0647584B1 (en) 1993-10-06 1999-04-07 Inventio Ag Door security circuit for monitoring halldoors in lift equipment
DE19921958A1 (en) * 1999-05-14 2000-12-14 Ifm Electronic Gmbh Proximity switch for detecting piston in lubricant distributor has adaptor which cooperates with piston to influence sensor coil
DE10143900A1 (en) * 2001-09-07 2003-03-27 Sick Ag Inductive proximity sensor
DE102004016632A1 (en) * 2004-03-29 2005-10-27 Pilz Gmbh & Co. Kg Safety switch for monitoring a protective door on an automated unit has a sensor and an activating device with a component for generating a sensor signal
DE102006032226A1 (en) * 2006-07-07 2008-01-17 Pilz Gmbh & Co. Kg Method and device for safe distance monitoring
DE102006046437A1 (en) * 2006-09-25 2008-04-10 Euchner Gmbh + Co. Kg Monitoring device for safety mechanism e.g. safety switches for protective door has coupling element through which read head and actuator cooperate in electrically contactless manner
DE102010021118A1 (en) * 2010-04-15 2011-10-20 Micro-Epsilon Messtechnik Gmbh & Co. Kg sensor

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1762105A1 (en) * 1968-04-06 1970-04-16 Bosch Gmbh Robert Contactless switching device
DE2042982A1 (en) * 1970-08-29 1972-03-09 Bosch Gmbh Robert Switching device for contactless signal transmission with proximity switches tuned to different frequencies
DE2644714A1 (en) * 1975-10-04 1977-04-14 Wickman Mach Tool Sales Ltd SAFETY DEVICE
DE2718459A1 (en) * 1977-04-26 1978-11-02 Licentia Gmbh Automatic proximity detector for railway wheels - is for railway traffic control and is stable under diverse conditions
DE2916279C2 (en) 1979-04-21 1987-07-23 Thyssen-M.A.N. Aufzuege Gmbh, 7303 Neuhausen, De
DE3643589A1 (en) * 1986-12-19 1987-05-27 Siemens Ag Circuit arrangement for reducing the temperature coefficient in inductive proximity switches
DE4233325A1 (en) * 1992-10-05 1994-04-28 Ifm Electronic Gmbh Inductive proximity switch for e.g. electronic control circuit - has sensor coil and sensor inductance having U-shaped ferrite core with square shaped base
EP0647584B1 (en) 1993-10-06 1999-04-07 Inventio Ag Door security circuit for monitoring halldoors in lift equipment
DE29710694U1 (en) * 1997-06-19 1997-09-11 Huber Peter Dipl Ing Fh Proximity switch with data transmission via an electromagnetic field
DE19921958A1 (en) * 1999-05-14 2000-12-14 Ifm Electronic Gmbh Proximity switch for detecting piston in lubricant distributor has adaptor which cooperates with piston to influence sensor coil
DE10143900A1 (en) * 2001-09-07 2003-03-27 Sick Ag Inductive proximity sensor
DE102004016632A1 (en) * 2004-03-29 2005-10-27 Pilz Gmbh & Co. Kg Safety switch for monitoring a protective door on an automated unit has a sensor and an activating device with a component for generating a sensor signal
DE102006032226A1 (en) * 2006-07-07 2008-01-17 Pilz Gmbh & Co. Kg Method and device for safe distance monitoring
DE102006046437A1 (en) * 2006-09-25 2008-04-10 Euchner Gmbh + Co. Kg Monitoring device for safety mechanism e.g. safety switches for protective door has coupling element through which read head and actuator cooperate in electrically contactless manner
DE102010021118A1 (en) * 2010-04-15 2011-10-20 Micro-Epsilon Messtechnik Gmbh & Co. Kg sensor

Similar Documents

Publication Publication Date Title
EP3122962B1 (en) Device for an actuation handle, actuation handle and method for wireless transfer of a self-sufficiently generated signal
WO1998043351A1 (en) Safety switch
EP3385596B1 (en) Safety device
EP1867820B1 (en) Closing device which can be monitored
DE102009059050B4 (en) Locking system for a safety switch and safety switch with such a locking system
DE102011008654A1 (en) Monitoring device for use at fitting of e.g. door of building to monitor object, has sensor units including opening and/or closing sensor and vibration sensor based on another type of principle in comparison to opening and/or closing sensor
DE19959233B4 (en) Inductive sensor for detecting metal parts
DE102015102947A1 (en) Field device of automation technology
DE69926455T2 (en) Key safety switch
WO2005067145A1 (en) Safety switch for monitoring a closing position of two parts which can be displaced in relation to each other
EP1473511B1 (en) Device for protection of access
EP3346177B1 (en) Safety device
DE102012008543A1 (en) Switch device for monitoring closing position of floor door, has actuator tuning coil to resonance in closed state of protective unit, where quality of resonance characteristic is tuned coil such that resonance frequency is tolerated
DE10138342A1 (en) Contactless door contact switch has Hall element signal evaluated via window comparator for provision of output signal
DE102004016632B4 (en) Safety switch for monitoring a protective door on an automated unit has a sensor and an activating device with a component for generating a sensor signal
DE102012018080A1 (en) Electro-mechanical interlock for use with device for protecting e.g. goods, has movable unit that is not blocked in degree of freedom by enable signal and locking mechanism that is executed resilient and is fitted with springs
DE102012205138B3 (en) Pressure switch device has housing, pressure chamber, magnetic switch and control element acting on magnetic switch in pressure-dependent manner, where control element is provided for changing switching state of magnetic switch
DE10392128B4 (en) Fire alarm station with a non-contact switch and method for operating a fire alarm station
DE102013019151A1 (en) Device for releasably locking and signaling a predefinable state of a protective device of a machine or the like, in particular safety switch
DE2549010A1 (en) PNEUMATICALLY OPERATED PRESSURE SWITCH
EP1730759B1 (en) Safety switch for monitoring a closed position of two parts that are movable relative to one another
DE2031015A1 (en) Control, in particular alarm system
DE202006006806U1 (en) Ball valve, comprising sensor unit assembled of interior and exterior components for reliable observation of ball position
DE102007041183B4 (en) Method for detecting the switching state
DE102010039584A1 (en) Magnetic actuator for gear box actuator device of motor car, has sensor unit that is arranged within inner space of housing in axial interstice between armature and magnetic coil for sensing quiescent state position of armature

Legal Events

Date Code Title Description
R163 Identified publications notified
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee

Effective date: 20141202