EP2560180B1 - Dispositif de commutation de sécurité - Google Patents

Dispositif de commutation de sécurité Download PDF

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Publication number
EP2560180B1
EP2560180B1 EP12180866.1A EP12180866A EP2560180B1 EP 2560180 B1 EP2560180 B1 EP 2560180B1 EP 12180866 A EP12180866 A EP 12180866A EP 2560180 B1 EP2560180 B1 EP 2560180B1
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EP
European Patent Office
Prior art keywords
switching device
safety switching
signal
safety
reset input
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
EP12180866.1A
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German (de)
English (en)
Other versions
EP2560180A3 (fr
EP2560180A2 (fr
Inventor
Markus Eilers
Henry Peter
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.)
Phoenix Contact GmbH and Co KG
Original Assignee
Phoenix Contact GmbH and Co KG
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Publication date
Application filed by Phoenix Contact GmbH and Co KG filed Critical Phoenix Contact GmbH and Co KG
Publication of EP2560180A2 publication Critical patent/EP2560180A2/fr
Publication of EP2560180A3 publication Critical patent/EP2560180A3/fr
Application granted granted Critical
Publication of EP2560180B1 publication Critical patent/EP2560180B1/fr
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/02—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays

Definitions

  • the present invention relates to a
  • a safety switching device having a reset input for starting the safety switching device after triggering its safety function, wherein an evaluation circuit is connected to the reset input to detect the application of a start signal, and the safety switching device provides different start modes and is executed, a start mode in accordance with select the detected start signal.
  • Safety switching devices such as safety relays or the like are known in the art as such and are used to perform switching operations in safety-related areas.
  • the triggering of its safety function takes place, as a result of which the safety switching device performs a predetermined operation.
  • a safe state is achieved, for example by disconnecting a load from the mains.
  • this condition may result in unwanted behavior after removal of the error. Therefore, in such safety switching devices is known to perform this with a reset input to be able to reset after triggering their safety function in a well-defined initial state.
  • the implementation of the reset function in the safety switching device is realized in that at a reset input an applied analog start signal, such as an applied voltage level or a voltage edge is detected with an analog evaluation circuit.
  • the safety switching device comprises a switching element and an operating mode setting device for selecting an operating mode depending on a defined input signal.
  • the safety switching device further comprises an input which is connected to the operating mode setting device, so that the input signal can be supplied to it.
  • the operating mode setting means is arranged to detect the input signal as one of at least three different defined input signals and to select one of at least three defined operating modes depending thereon.
  • the invention is therefore based on the object to provide a safety switching device, the universal can select different start modes, the selection of the start modes is performed quickly, easily and with high reliability.
  • a safety switching device with a reset input for starting the safety switching device is specified after triggering its safety function, wherein an evaluation circuit is connected to the reset input in order to detect the application of a start signal, and the safety switching device provides and executes various start modes. selecting a start mode in accordance with the detected start signal, the evaluation circuit including sampling means for sampling the signal applied to the reset input and detecting it from a sequence of samples.
  • the basic idea of the invention is thus to carry out the detection of the analog start signal by means of a digital scan, in which case the respective start signal is detected from a sequence of sampled values.
  • the length of the sequence can be selected depending on the types of defined start signals and in principle be arbitrary. However, it is advantageous to record the respective start signal from as short a sequence of sample values as possible in order to enable a quick restart.
  • the sampling can be done with arbitrary parameters in order to use both simple signals as well as complex signals, for example well-defined level curves, as a start signal can.
  • the number of different start modes can be set practically arbitrarily high by selecting the parameters for sampling the signal applied to the reset input. With an increase in the duration of the sampling and an associated increased number of samples, the start signal can be detected with high reliability, since short-term temporary deviations from the starting signal are disregarded.
  • the evaluation circuit is designed to detect a voltage level as a start signal.
  • the evaluation circuit is designed to detect a voltage edge as a start signal.
  • the evaluation circuit is designed to detect a clocked signal as a start signal. Due to the flexibility in detecting the start signal, it is possible to detect various of the above-mentioned start signals in an evaluation circuit. The types of start signals mentioned are easy to generate and enable reliable detection by the evaluation circuit. A combination of the different signals is also possible.
  • the reset input is biased to a voltage level.
  • the bias voltage forms a quiescent level, so that deviations from this can be recognized as the indication of a start signal.
  • the application of a ground signal can be easily detected.
  • biasing the reset input can detect both an applied signal at a ground level and an operating voltage level as a start signal.
  • the evaluation circuit has a voltage divider, via which a part of the signal present at the reset input is supplied to the sampling device for sampling. This makes it possible to use start signals with substantially arbitrary voltage levels, since the voltage divider applied to the scanning device only for this appropriate voltage level.
  • the evaluation circuit has means to protect a scanning input of the scanning device in case of failure.
  • Such means may for example be decoupling means, which decouples the reset input in the event of a short circuit from the scanning device.
  • Such coupling means may comprise, for example, a coupling resistor which limits a current to the scanning device.
  • a decoupling diode may also be connected to the input of the sampling device in order to limit a voltage level to its analog input.
  • the safety switching device may comprise a checking device, which is arranged and designed to provide different starting signals to the scanning device.
  • the checking device can read the start signals directly at the scanning device or anywhere between the reset input and the scanner.
  • the checking device in safety-relevant switching devices and the correct function of the restart or the reset is to ensure, so that a review of this function improves the reliability. By providing various start signals, the response of the safety switching device to all such start signals can be checked.
  • the safety switching device may comprise an actuating device, for example in the form of a switch or a button, in order to carry out a check of the evaluation circuit, or the check is signaled and started via a signal input of the safety switching device.
  • an output of the check result via the signal input or other suitable output means for example, a visual display, take place.
  • the checking device is arranged and designed to provide different starting signals to the scanning device as modulated signals. Due to the modulation different start signals can be easily generated, at the same time a universal generation of start signals can be done.
  • the verifier may have an output connected to an input of the sampler to connect this input either to ground or to a predefined one Voltage level, for example, operating voltage to put. By temporal sequence of voltage levels and ground arbitrary start signals can be provided. If the input of the sampling device is biased at the predefined voltage level, it may be sufficient to ground the input of the sampling device via the checking device in order to modulate the starting signals.
  • At least one signal generating unit is provided and connected to an output contact of the safety switching device to provide a start signal to the reset input.
  • the signal provided by the signal generation unit is returned via a connected circuit to the safety switching device, more precisely to its reset input, in order to be detected as a start signal.
  • the specification of the signals by the signal generation unit ensures that only suitable signals are applied as start signals to the reset input. Errors resulting from external generation of the start signals are avoided.
  • the signal generation unit may generate a voltage level or a clock signal that can be used to generate start signals.
  • a plurality of signal generating units is provided and each connected to an output contact of the safety switching device, wherein the output contacts of the signal generating units are interconnected to provide a predetermined signal at the reset input.
  • a signal generation unit can have at least one constant Provide voltage levels, and another signal generating unit a clocked signal, which is superimposed on the constant voltage level.
  • the safety switching device is a safety relay.
  • FIG. 1 shows a safety switching device 1, in which various modules relating to the invention are shown schematically.
  • the safety switching device 1 is designed to carry out a plurality of different starting modes with which the safety switching device 1 can be started after triggering its safety function.
  • the safety switching device 1 comprises an evaluation circuit 2, which is connected to an analog reset input IN of the safety switching device 1.
  • the evaluation circuit 2 comprises an input circuit 3 and a sampling device 4, which in Fig. 1 is called logic.
  • the input circuit 3 includes a bias source, not shown, which biases the reset input IN through a resistor R1 and a diode D1 with a bias voltage V1.
  • the voltage level of the bias voltage V1 is between ground and an operating voltage, also referred to herein as Vcc, and in this embodiment is half the operating voltage Vcc.
  • the input circuit 3 comprises a voltage divider 5 with two resistors R2, R3, between which a potential V2 is tapped.
  • the potential V2 thus corresponds to the respective one at the reset input IN applied potential, however, is suitable for a sampling input AI of the scanning device 4 as an input level.
  • the input circuit 3 as protection for the scanning device 4, a resistor R4 and a diode D2, via which the potential V2 of the voltage divider 5 to the sampling input AI of the scanning device 4 is connected.
  • the resistor R4 is designed as a decoupling resistor in the connection of the potential V2 with the sampling input AI, while the diode D2 is coupled via ground to this connection in order to limit a level at the sampling input AI of the sampling device 4.
  • the resistor R4 thus begins the fault case of a short circuit of the resistor R2 of the voltage divider 5, while the diode D2 causes a limitation of the input voltage at the sampling input AI of the scanning device 4 in the event of an error of the resistor R1.
  • the safety switching device 1 further comprises a checking device 6, in FIG Fig. 1 Also referred to as a test, which is connected via a resistor R5 to the sampling input AI of the scanning device 4. Both the scanning device 4 and the checking device 6 are each connected to the operating voltage Vcc and the ground of the safety switching device 1.
  • the scanning device 4 is designed to scan via the input circuit 3 a signal applied to the reset input IN analog signal and to detect a start signal. For this purpose, a sequence of samples is evaluated, and in the case of detection of a start signal, a message to a control device of the safety switching device 1, not shown here Posted.
  • the evaluation circuit 2 is designed to detect both voltage levels, voltage edges and clocked signals as start signals. By the bias of the reset input IN, both the application of ground as well as a different voltage level from the bias voltage V1 can be detected by the scanning device 4.
  • the safety switch device 1 selects a start mode in accordance with the detected start signal to restart after the triggering of its safety function.
  • the checking device 6 is designed to apply different start signals as modulated signals via the resistor R5 to the sampling input AI of the sampling device 4. For this purpose, a voltage applied to the sampling input AI voltage level V3 is raised or lowered via the resistor R5 by applying the operating voltage Vcc or ground, so as to produce different start signals.
  • the scanning device 4 is connected to the checking device 6 in order to be able to transmit the detected start signal to the latter, so that the checking device 6 can compare the generated starting signal with the starting signal detected by the scanning device 4 in order to check the function of the scanning device 4.
  • the safety switching device 1 further comprises a power supply unit 7, which is connected to two supply inputs A1, A2 of the safety switching device 1.
  • the power supply unit 7 is connected to a power source 11 to power the safety switch device 1, as in FIGS FIGS. 2 to 5 you can see.
  • the power supply unit 7 supplies the operating voltage Vcc.
  • the safety switching device comprises two signal generating units 8, 9, which are designed as first and second clock generator.
  • the two signal generating units 8, 9 are connected to corresponding clock outputs T0, T1 of the safety switching device 1, and provide different clock signals over it.
  • the clock generation in the signal generating units 8, 9 is controlled by the scanner 4.
  • the external circuitry each comprises an actuator 10, via which the corresponding start signal is applied to the reset input IN when actuated.
  • the actuating device 10 may be designed as an electrical switch or button.
  • the power source 11 is connected to the safety input 1 via the supply inputs A1, A2, respectively, and supplies a level of 24 V.
  • FIGS. 2 and 3 show the application of DC voltages with different levels to the reset input IN.
  • the respective level is provided by the power source 11.
  • the level of 24V triggers a manually monitored reset in the safety switching device 1, while according to FIG. 3 the level is at ground and triggers an automatic reset.
  • a clock signal is used as a start signal, as described above on the Actuator 10 is applied to the reset input IN.
  • the clock signal in FIG. 4 is tapped via the clock output T0, while according to FIG. 5 the clock signal is tapped at the clock output T1.
  • the according to FIG. 4 provided start signal a manually monitored reset with a delayed start and the start signal according to FIG. 5 cause an automatic reset with a delayed start.
  • the assignment of the start signals to the different start modes according to the FIGS. 2 to 5 is purely arbitrary. Other assignments are also possible. Also, the selection of the start modes mentioned here is purely arbitrary. Likewise, other applications can be selected via the selection of the signal source for the reset, for example applications with or without waste delay.

Landscapes

  • Electronic Switches (AREA)
  • Safety Devices In Control Systems (AREA)
  • Keying Circuit Devices (AREA)

Claims (12)

  1. Dispositif de commutation de sécurité (1) avec une entrée de remise à zéro (IN) pour démarrer le dispositif de commutation de sécurité (1) après un déclenchement de sa fonction de sécurité, où
    un circuit d'évaluation (2) est relié avec l'entrée de remise à zéro (IN) afin de détecter l'application d'un signal de départ, et
    le dispositif de commutation de sécurité (1) met à disposition divers modes de démarrage et est conçu pour choisir un mode de démarrage en adéquation avec le signal de départ détecté,
    caractérisé en ce que
    le circuit d'évaluation (2) comprend un dispositif de balayage (4) afin d'effectuer un sondage du signal avoisinant de l'entrée de remise à zéro (IN) et de le détecter à partir d'une suite de valeurs de balayage.
  2. Dispositif de commutation de sécurité (1) selon la revendication 1, caractérisé en ce que le circuit d'évaluation (2) est conçu pour détecter un niveau de tension servant de signal de départ.
  3. Dispositif de commutation de sécurité (1) selon l'une des revendications 1 ou 2, caractérisé en ce que
    le circuit d'évaluation (2) est conçu pour détecter un front de tension servant de signal de départ.
  4. Dispositif de commutation de sécurité (1) selon l'une des revendications précédentes, caractérisé en ce que
    le circuit d'évaluation (2) est conçu pour détecter un signal synchronisé servant de signal de départ.
  5. Dispositif de commutation de sécurité (1) selon l'une des revendications précédentes, caractérisé en ce que
    l'entrée de remise à zéro (IN) est précontrainte avec un niveau de tension.
  6. Dispositif de commutation de sécurité (1) selon l'une des revendications précédentes, caractérisé en ce que
    le circuit d'évaluation (2) présente un diviseur de tension (5) par lequel une partie du signal avoisinant de l'entrée de remise à zéro (IN) est transmise vers le dispositif de balayage (4) pour être soumise au balayage.
  7. Dispositif de commutation de sécurité (1) selon l'une des revendications précédentes, caractérisé en ce que
    le circuit d'évaluation (2) présente des moyens (D2, R4) pour protéger l'entrée vers un balayage (A) du dispositif de balayage (4) en cas d'erreur.
  8. Dispositif de commutation de sécurité (1) selon l'une des revendications précédentes, caractérisé en ce que
    le dispositif de commutation de sécurité (1) comprend un dispositif de contrôle (6) qui est agencé et conçu pour mettre à disposition divers signaux de départ au niveau du dispositif de balayage (4).
  9. Dispositif de commutation de sécurité (1) selon la revendication 8, caractérisé en ce que
    le dispositif de contrôle (6) est agencé et conçu pour mettre à disposition divers signaux de départ sous la forme de signaux modulés.
  10. Dispositif de commutation de sécurité (1) selon l'une des revendications précédentes, caractérisé en ce
    qu'au moins une unité de génération de signaux (8, 9) est prévue et est reliée avec un contact de sortie (T0, T1) du dispositif de commutation de sécurité (1), afin de mettre un signal de départ à disposition sur l'entrée de remise à zéro (IN).
  11. Dispositif de commutation de sécurité (1) selon la revendication 10, caractérisé en ce
    qu'une multiplicité d'unités de génération de signaux (8, 9) est prévue et est respectivement reliée avec un contact de sortie (T0, T1) du dispositif de commutation de sécurité (1), où les contacts de sortie (T0, T1) des unités de génération de signaux (8, 9) peuvent être commutés ensemble afin de mettre un signal prédéfini à disposition au niveau de l'entrée de remise à zéro (IN).
  12. Dispositif de commutation de sécurité (1) selon l'une des revendications précédentes, caractérisé en ce que
    que le dispositif de commutation de sécurité (1) est un relais de sécurité.
EP12180866.1A 2011-08-18 2012-08-17 Dispositif de commutation de sécurité Active EP2560180B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE201110052810 DE102011052810A1 (de) 2011-08-18 2011-08-18 Sicherheitsschalteinrichtung

Publications (3)

Publication Number Publication Date
EP2560180A2 EP2560180A2 (fr) 2013-02-20
EP2560180A3 EP2560180A3 (fr) 2014-02-05
EP2560180B1 true EP2560180B1 (fr) 2016-04-13

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ID=46799052

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12180866.1A Active EP2560180B1 (fr) 2011-08-18 2012-08-17 Dispositif de commutation de sécurité

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EP (1) EP2560180B1 (fr)
DE (1) DE102011052810A1 (fr)
ES (1) ES2574410T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107658181B (zh) * 2017-10-19 2019-06-21 深圳南云微电子有限公司 一种接触器节电器
WO2019128662A1 (fr) * 2017-12-27 2019-07-04 上海辰竹仪表有限公司 Relais de sécurité intelligent et circuits appliqués par celui-ci

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4751606A (en) * 1987-02-20 1988-06-14 Westinghouse Electric Corp. Circuit interrupter apparatus with a battery backup and reset circuit
US4814712A (en) * 1987-06-17 1989-03-21 General Electric Company Test kit for a circuit breaker containing an electronic trip unit
DE10016712C5 (de) * 2000-04-04 2004-09-16 Pilz Gmbh & Co. Sicherheitsschaltgerät und Verfahren zur Einstellung einer Betriebsart eines Sicherheitsschaltgeräts
DE102004010852A1 (de) * 2004-03-05 2005-11-17 Infineon Technologies Ag Schaltung mit einem Normalbeitriebsmodus und einem Konfigurationsmodus
DE502006007296D1 (de) * 2005-08-02 2010-08-05 Phoenix Contact Gmbh & Co Sicherheitsvorrichtung zum mehrkanaligen Steuern einer sicherheitstechnischen Einrichtung
US7738230B2 (en) * 2008-01-04 2010-06-15 Leach International Corporation Nonvolatile status indicator switch
US8045310B2 (en) * 2009-12-30 2011-10-25 Infineon Technologies Ag Semiconductor device with overcurrent protection
DE102010060415B4 (de) 2010-11-08 2015-11-12 Phoenix Contact Gmbh & Co. Kg Sicherheitsrelais und Verfahren zum Schalten eines Sicherheitsrelais

Also Published As

Publication number Publication date
ES2574410T3 (es) 2016-06-17
EP2560180A3 (fr) 2014-02-05
EP2560180A2 (fr) 2013-02-20
DE102011052810A1 (de) 2013-02-21

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