EP1259969B1 - Sicherheitsschaltvorrichtung mit einem ersten und einem zweiten eingangsschalter - Google Patents

Sicherheitsschaltvorrichtung mit einem ersten und einem zweiten eingangsschalter Download PDF

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Publication number
EP1259969B1
EP1259969B1 EP01905781A EP01905781A EP1259969B1 EP 1259969 B1 EP1259969 B1 EP 1259969B1 EP 01905781 A EP01905781 A EP 01905781A EP 01905781 A EP01905781 A EP 01905781A EP 1259969 B1 EP1259969 B1 EP 1259969B1
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EP
European Patent Office
Prior art keywords
input
switch
safety switching
input switch
contacts
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
EP01905781A
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German (de)
English (en)
French (fr)
Other versions
EP1259969A1 (de
Inventor
Gerhard Ehrlich
Boris Kaufmann
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.)
Pilz GmbH and Co KG
Original Assignee
Pilz GmbH and Co KG
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Publication date
Application filed by Pilz GmbH and Co KG filed Critical Pilz GmbH and Co KG
Publication of EP1259969A1 publication Critical patent/EP1259969A1/de
Application granted granted Critical
Publication of EP1259969B1 publication Critical patent/EP1259969B1/de
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
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/001—Thumb wheel switches
    • 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
    • H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit

Definitions

  • the present invention relates to a safety switching device for safely stopping a machine system from who runs a risk with a first and a second Input switches, their respective switching positions simultaneously and redundantly define a manipulated variable on the input side, with at least one output switching element that is in an output circuit the safety switching device is arranged, and with an evaluation and control unit that depends on the defined manipulated variable, the at least one output switching element controls, the evaluation and control unit two channels is formed, wherein a first channel with the first input switch and a second channel with the second input switch is connected, and wherein switching contacts of the first and of the second input switch with regard to their switching position are coupled to one another via a common actuator.
  • Such a safety switching device is from the applicant of the present invention under the type designation PNOZ XV2 distributed.
  • Safety switching devices in the sense of the present Invention belong to both independent safety relays as well as complex safety controls, for example on the basis of a safe PLC control.
  • Such devices are mainly used in the industrial area to switch operations to perform in a safe manner.
  • "Safe" means in this context that the device at least meets category 3 of the European standard EN 954-1.
  • such devices are used to in Reaction to the actuation of an emergency stop button or opening a protective door a machine system from which there is a danger going out, stopping or otherwise in a safe Convict state. Because device failure in one such situation is an immediate threat to people or also results in material values are considered the fail safety of safety switching devices very much high demands made. This leads to a lot of effort combined with high development and manufacturing costs of safety switching devices.
  • the input side Manipulated variable is a time constant that is a delay time determined when switching off. Such a delay time is required, for example, to switch off a Machine system controls movable drives in one to be able to move to a safe resting position.
  • the time constant is in the known safety switching device with the help set by two mutually redundant rotary switches that arranged one below the other or one behind the other on a common shaft are. This structure is described in more detail below with reference to FIG. 2 explained.
  • the manipulated variable to be set can be used by everyone a safety switching device relevant input parameters his.
  • the known safety switching device fulfills the safety requirements Requirements of the standard EN 954-1 in particular this is because the two input switches are separate from each other define the desired time constant. Due to the Resulting redundancy can be a fault on one of the switches reliably recognized by the evaluation and control unit become.
  • the disadvantage is that the production of the known Safety switching device a high mechanical effort requires what is associated with correspondingly high costs.
  • the structure of the known safety switching device is required comparatively much space, what a miniaturization generic devices prevented or at least difficult.
  • Switch units known for many years in which by the actuation of an actuator perform two switching functions to let.
  • a corresponding switch unit is, for example described in DE 25 45 719 A1.
  • This task is performed in the safety switching device mentioned at the beginning solved in that the switching contacts of the first and second input switch spatially on one level are arranged and that the actuator is a common circular support member includes on which the switching contacts of the first and second input switch arranged radially offset from each other are.
  • the switch contacts of the two are Input switch in the known safety switching device in two parallel planes. This has to Consequence that the two input switches in two separate Steps in the housing of the safety switching device must be installed.
  • the two Input switch in the safety switching device according to the invention can be assembled in a single step. This simplifies assembly and the invention Safety switching device can be produced more cheaply become.
  • the actuator contains a common one Carrier element on which the switching contacts of the first and second Input switch arranged spatially offset from each other are.
  • This measure has the advantage that the switch contacts two input switches on structurally very simple and therefore inexpensive way are coupled. On couplings, Gearbox or other measures to transmit a shift movement from the first input switch to the second therefore be dispensed with without the risk of different Operator setting exists.
  • this is common carrier element adjustable in rotation.
  • the common carrier element may be translationally adjustable.
  • design has an advantage above all if the two input switches multi-position switch are, since the existing switching contacts save space to each other and can thus be arranged in a more compact manner.
  • the common carrier element is a carrier disc on which the switching contacts of the first and second input switches are arranged radially offset from one another.
  • the two can be separated Input switch particularly small and space saving in be integrated into a common mechanical structure. moreover This also simplifies the assembly of the input switches in the housing of the safety switching device according to the invention.
  • This measure has the advantage that the separate Input switch a common, redundant in itself Form component that is very simple and therefore inexpensive Way in the safety switching device according to the invention can be assembled. It also failsafe increased even further because of the risk of damage the redundant switch arrangement during assembly or at a later intervention in the safety switching device is reduced is. In addition, the safety-relevant switch arrangement in this way particularly good against external environmental influences, such as pollution. This also contributes to increasing error security.
  • the switch contacts of the first and second input switch sliding contacts, with the help of the actuator via fixed contact surfaces are movable.
  • the two input switches are on fail-safe Way even in very large numbers produce what minimizes the cost of the two input switches.
  • the error measure further increases the reliability, since conductor track structures in the operation of the device are not subject to any wear or at most extremely little wear, so that a subsequent operation of the device occurring errors is largely excluded. Likewise the risk of subsequent cross-circuits or short-circuits reduced.
  • the first and second input switches each multi-position switch.
  • the first and second input switches on the input side and output side Connection contacts, each in a matrix structure to each other are arranged.
  • This measure has the advantage that the number of required Connection contacts for the two input switches reduced can be, which is also a reduction in the required Space allows. It also simplifies thereby the assembly.
  • This measure reduces the number of connections required reduced again for the two input switches. So this measure makes it possible, for example, to 16 each other redundant switch positions, i.e. a total of 32 switch positions, with only a total of 12 connection contacts. As a result, the space of the invention Arrangement reduced again and the assembly can be simplified.
  • FIG. 1 is a safety switching device according to the invention in the form of a safety switching device in its entirety designated with the reference number 10.
  • the safety switching device 10 has two mutually redundant ones Input switches 12 and 14 with regard to their switching position about a common, shown only schematically here Actuator 16 are coupled together.
  • the input switches 12, 14 are in an identical manner in one Integrated voltage divider, each consisting of a resistor 18a, 18b and a resistance group 20a, 20b.
  • the resistance groups 20a, 20b include here Embodiment three arranged parallel to each other Resistors with different resistance values.
  • On the both voltage dividers is an operating voltage, which in present embodiment is 24 V.
  • the two voltage dividers generate depending on the respective switching position the input switch 12, 14 an output signal that a timer in each case via a further resistor 22a, 22b 24a, 24b is supplied.
  • timers 24a, 24b redundant to each other and depending on the respectively received Voltage is a time constant that of an evaluation and Control unit 26 is supplied. The tension obtained depends thereby from the respective switching position of the two input switches 12, 14 from.
  • the evaluation and control unit 26 is in the present exemplary embodiment trained in two channels and points in each channel a microcontroller 28a, 28b.
  • the microcontrollers 28a, 28b also evaluate others not shown here Input signals from, for example, an emergency stop button or a protective door can be generated. Dependent on of these input signals as well as the redundantly defined to each other
  • the microcontrollers 28a, 28b control time constants output switch contacts 30a, 30b, respectively.
  • the output switch contacts 30a, 30b are in series with each other in a power supply path a machine system 32 is arranged.
  • Relay contacts 30a, 30b can also semiconductor elements can be used as output switching elements.
  • the entire safety switching device 10 is in a housing 34 housed, the terminals in a conventional manner 36 for connecting the power supply and the machine system 32 has.
  • Fig. 2 is a generic safety switching device, such as sold by the assignee of the present invention is designated in its entirety by the reference number 40.
  • the housing 34 of the safety switching device 40 leaves in the present Cross-sectional representation of a front 42 and two Recognize side walls 44, 46. Are inside the housing 34 along the two side walls 44, 46 each component carrier arranged in the form of so-called boards 48, 50. exemplary are 48 individual components with the reference numerals on the board Denoted 52 and 54. It is also exemplary on the board 50 the comparatively large housing of a relay 56 shown that the output switch contacts 30a, 30b includes.
  • the reference numbers 58 and 60 denote two further boards, the parallel to the front 42 and parallel to each other are fixed between the boards 48 and 50.
  • Next further components 52, 54 are located on these two Circuit boards the input switches 12 and 14. These are here about rotary switches, one below the other or one behind the other common shaft 62 are attached.
  • the shaft 62 occurs on the Front 42 of the housing 34 to the outside and is there with a Knob 64 connected.
  • the shaft 62 thus forms a common one Actuator for the two input switches 12 and 14 are the switching contacts of the two input switches 12 and 14, as can be seen from the illustration in FIG. 2, in different arranged parallel to each other planes 66, 68.
  • the invention differs Safety switching device 10 from the known safety switching device 40 among other things by the fact that on the two Boards 58, 60 arranged parallel to the front side 42 are dispensed with can be. Instead, the two input switches are located 12 and 14 in this exemplary embodiment in one common input switch unit 70, the structure of which follows is explained in more detail with reference to FIGS. 4 and 5.
  • the input switch unit 70 is via pins 72 to the board 48 connected.
  • this arrangement is only one possible Embodiment reflected.
  • the input switch unit 70 also arranged parallel to the front side 42 Board 58 may be contacted.
  • Safety switching device 40 is such a circuit board 58 as well as a second circuit board 60 arranged parallel thereto, however not necessarily required.
  • the input switch unit 70 has a switch housing 74 in which the mechanical actuating parts are accommodated.
  • the switch housing 74 is open a circuit board 76.
  • the board 76 has on that Switch housing 74 side facing several along circular paths running conductor tracks 78, 80, 82, 84.
  • Each of the Conductor tracks 78 to 84 each have a contact pin 72 connected, the connections for the conductor tracks 82 and 84 in the present embodiment on the back the board 76 are executed, which is indicated by the dotted line is shown.
  • a circular support disc 86 arranged in the direction of arrow 88 is rotatable.
  • the actuation of the carrier disk 86 is optionally carried out by one of two buttons 90, 92, each tangential and parallel to each other along two side walls of the switch housing 74 are arranged.
  • On the board 76 facing away from the carrier disc 86 one star-shaped structure 94, in the cams 96, 98 of the two Push buttons 90, 92 can intervene.
  • the buttons 90, 92 with springs 100, 102 are against supported the rear wall of the switch housing 74.
  • the actuation one of the two buttons 90, 92 has the consequence that the Carrier disc 86 around one tooth of the star-shaped structure 94 is rotated in the direction of arrow 88.
  • the radial are staggered.
  • the pair of sliding contacts 104 interacts with conductor tracks 78 and 80, while the sliding contact pair 106 with the conductor tracks 82 and 84 cooperates.
  • the sliding contact pair 104 is located in an angular range above the diagonal 108 according to FIG. 5, it establishes a conductive connection between the otherwise galvanically isolated interconnects 78 and 80 ago. In this The case is the input switch 12 between the contact pins 72 and 73 closed.
  • the sliding contact pair 104 is in one Angular position that is below the diagonal 108 according to FIG. 5 there is no conductive connection between the conductor tracks 78 and 80 so that the switch between the contact pins 72 and 73 is open.
  • the conductor tracks 78 to 84 are in this way to one another on the circuit board 76 arranged that the input switch realized thereby 12 and 14 each simultaneously and redundantly to each other turn.
  • the switching logic is easy to understand the input switch unit 70 mainly from the arrangement of Conductor tracks 78 to 84 on the circuit board 76.
  • the present exemplary embodiment is aware of the invention simply chosen. However, it is understood that by an appropriate Choice of trace structure also redundant multi-position switches are realizable.
  • the input switch unit 70 is a particularly preferred one Embodiment for a safety switching device according to the invention 10.
  • the Slip contact pairs 104, 106 and the conductor track structures 78 up to 84 i.e. all switching contacts of the two input switches 12 and 14, thereby within a common level 110.
  • the use of a two-button switch of the type shown is not essential for the implementation of the invention required.
  • the carrier disk 86 can also be used, for example a shaft 62 and a knob 64 can be adjusted, such as this is known from the safety switching device 40.
  • Desired switching positions would be 64 contact pins per se or appropriate connection options required. This number can be suitably encoded Reduce switching positions using a matrix structure.
  • FIG. 6 shows a preferred exemplary embodiment of a matrix structure 120 for the input switches 12 and 14.
  • the matrix structure 120 has four connection contacts 122, the parallel switch contacts 124, 126 of the two input switches 12 and 14 are supplied.
  • the mutually assigned switching contacts 124, 126 are the mutually assigned switching contacts 124, 126 by shifted one step towards each other, i.e. it is here 6 top switching contact 124 of the input switch 12 with the second uppermost switch contact 126 of the input switch in FIG. 6 14 connected.
  • the Switch contacts 124, 126 of the two input switches 12 and 14 but also linked by other increments become.
  • the output-side switching contacts 132, 134 of the two input switches 12 and 14 are separated from one another on the output side Connection contacts 136, 138 performed. Because of the matrix arrangement can be compared or evaluated of the signals at the input contacts 122 and the current-side connection contacts 136, 138 Determine the switching position of the input switches 12 and 14.
  • the matrix structure 120 shown here is due to the common input-side connection contacts 122 and the separate output-side connection contacts 132, 134 a fail-safe Evaluation with a minimum number of connection contacts possible.

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  • Keying Circuit Devices (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Programmable Controllers (AREA)
  • Air Bags (AREA)
EP01905781A 2000-02-29 2001-02-16 Sicherheitsschaltvorrichtung mit einem ersten und einem zweiten eingangsschalter Expired - Lifetime EP1259969B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10009707 2000-02-29
DE10009707A DE10009707A1 (de) 2000-02-29 2000-02-29 Sicherheitsschaltvorrichtung mit einem ersten und einem zweiten Eingangsschalter
PCT/EP2001/001728 WO2001065577A1 (de) 2000-02-29 2001-02-16 Sicherheitsschaltvorrichtung mit einem ersten und einem zweiten eingangsschalter

Publications (2)

Publication Number Publication Date
EP1259969A1 EP1259969A1 (de) 2002-11-27
EP1259969B1 true EP1259969B1 (de) 2003-09-24

Family

ID=7632931

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01905781A Expired - Lifetime EP1259969B1 (de) 2000-02-29 2001-02-16 Sicherheitsschaltvorrichtung mit einem ersten und einem zweiten eingangsschalter

Country Status (7)

Country Link
US (1) US6825579B2 (ja)
EP (1) EP1259969B1 (ja)
JP (1) JP2003526879A (ja)
AT (1) ATE250804T1 (ja)
AU (1) AU2001233771A1 (ja)
DE (2) DE10009707A1 (ja)
WO (1) WO2001065577A1 (ja)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216226A1 (de) * 2002-04-08 2003-10-30 Pilz Gmbh & Co Vorrichtung zum fehlersicheren Abschalten eines elektrischen Verbrauchers, insbesondere in industriellen Produktionsanlagen
DE10235502C1 (de) 2002-08-02 2003-12-24 Siemens Ag Vorrichtung und Verfahren zur sicheren Schalterstellungserkennung eines Drehschalters
EP1484780A1 (de) * 2003-06-03 2004-12-08 Siemens Aktiengesellschaft Ansteuervorrichtung für sicherheitskritische Komponenten und entsprechendes Verfahren
DE10327959B4 (de) * 2003-06-20 2015-07-16 Siemens Aktiengesellschaft Überwachungsverfahren für mindestens zwei Schaltpfade und Beschaltung für eine Last
US7610119B2 (en) * 2003-07-08 2009-10-27 Omron Corporation Safety controller and system using same
CN100514523C (zh) * 2003-08-08 2009-07-15 西门子公司 用于级联电路的保护装置及相应的安全开关方法
WO2005101439A1 (de) * 2004-04-19 2005-10-27 Pilz Gmbh & Co. Kg Meldegerät für eine sicherheitsschaltung
US7453677B2 (en) * 2004-10-06 2008-11-18 Teknic, Inc. Power and safety control hub
US8363371B2 (en) 2005-08-02 2013-01-29 Phoenix Contact Gmbh & Co. Kg Safety switching device for setting a safety-related device to a safe state
US7723630B1 (en) * 2005-09-23 2010-05-25 Southwire Company Remote safety switch
DE102005048601B3 (de) * 2005-10-06 2007-04-05 Pilz Gmbh & Co. Kg Vorrichtung und Verfahren zum fehlersicheren Auswerten eines Stellungsgebers, insbesondere eines Potentiometers
CN101114824B (zh) * 2007-06-28 2010-05-19 翁天禄 交流二线式固态开关的联动装置
DE102011081184A1 (de) * 2011-08-18 2013-02-21 Siemens Aktiengesellschaft Verfahren zum Schalten in einer Anordnung von Leistungsschaltern sowie Anordnung aus einer Mehrzahl von Leistungsschaltern
WO2014041568A1 (en) * 2012-09-11 2014-03-20 Power-One Italy S.P.A. Safe disconnection relay

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DE1059536B (de) 1956-10-23 1959-06-18 Telefunken Gmbh Lagerung von Kontaktstuecken fuer Stufendrehschalter
US3683368A (en) * 1970-10-22 1972-08-08 Houston Natural Gas Corp Digital encoding transducer
DE2545719C3 (de) * 1975-10-11 1979-01-18 Preh, Elektrofeinmechanische Werke Jakob Preh Nachf., 8740 Bad Neustadt Mehrfachstufenschalter mit einem vorwärts- oder riickwärtsschaltbaren Schrittschaltwerk
GB2034991B (en) * 1978-11-16 1983-03-02 Vickers Ltd Encoding switches
DE3017244A1 (de) * 1980-05-06 1981-11-12 Fritz Hartmann Gerätebau GmbH, 8581 Eckersdorf Codierschalter

Also Published As

Publication number Publication date
US20030057069A1 (en) 2003-03-27
DE50100684D1 (de) 2003-10-30
WO2001065577A1 (de) 2001-09-07
EP1259969A1 (de) 2002-11-27
US6825579B2 (en) 2004-11-30
AU2001233771A1 (en) 2001-09-12
DE10009707A1 (de) 2001-09-06
ATE250804T1 (de) 2003-10-15
JP2003526879A (ja) 2003-09-09

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