EP0008023A1 - Security signalling system - Google Patents

Security signalling system Download PDF

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Publication number
EP0008023A1
EP0008023A1 EP79102541A EP79102541A EP0008023A1 EP 0008023 A1 EP0008023 A1 EP 0008023A1 EP 79102541 A EP79102541 A EP 79102541A EP 79102541 A EP79102541 A EP 79102541A EP 0008023 A1 EP0008023 A1 EP 0008023A1
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EP
European Patent Office
Prior art keywords
individual
distributor
current paths
line
detectors
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Withdrawn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
EP79102541A
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German (de)
French (fr)
Inventor
Wolfgang Benckendorff
Hans Dipl.-Ing. Kübler
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.)
Siemens AG
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Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0008023A1 publication Critical patent/EP0008023A1/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08—Signalling of tampering with the line circuit

Definitions

  • the invention relates to aracemeldeanla- g e with a number of detector lines, each with two or more outgoing from a central current paths, which are guided via distributor for connecting each of one or more detectors, where the individual current paths from manifold to manifold, or from a distributor to the individual detectors are formed by differently colored wires of a cable.
  • Such systems are common. Cable wires with different colors are used to identify the individual current paths so that, on the one hand, the individual detection lines can be specifically switched through when the system is being set up, the individual detectors can be switched on correctly, and, on the other hand, the individual current paths can be identified in the event of faults in each line section.
  • this identification of the individual current paths in intrusion detection systems facilitates targeted manipulation. For example, by short-circuiting certain line sections certain detectors are rendered ineffective.
  • terminal resistors are installed in each detector. If such a detector is short-circuited, the change in resistance on the line in the control center leads to an alarm.
  • the size of the terminating resistors limits the number of detectors that can be connected to a maximum of one line.
  • the object of the invention is to design a security alarm system of the type mentioned at the outset against sabotage, without the individual detectors having to be equipped with additional devices such as terminal resistors for this purpose.
  • this object is achieved in that the individual line wires marked with specific colors are assigned to different current paths in each cable section according to a random distribution.
  • the individual lines can no longer be identified by an outsider.
  • the line marking is retained for assembly and maintenance, since the color distribution selected when the system was set up can be defined and saved for each line section.
  • the drawing shows the structure of an intruder alarm system with a control center Z, to which various alarm lines ML1 to MLm are connected.
  • facilities for line monitoring as well as for alarming and displaying are provided in the usual way.
  • quiescent current-monitored zones with two current paths each are provided, i.e. the ML1 line with the L11 and L12 current lines, the ML2 zone with the L21 and L22 current paths etc.
  • more lines per zone can also be provided.
  • a sabotage line SL with the two current paths S1 and S2 is switched on.
  • the current paths of the individual detection lines ML and the sabotage line SL are switched from the central station Z via several distributors V1, V2 etc. to the distributor Vn.
  • the current loop of each detection line is closed via a terminating resistor R1, R2 etc.
  • a specific voltage is then applied to each signaling line in the control center Z, so that a quiescent current of a certain magnitude flows through the respective terminating resistor. In this way, every line interruption as well as every line short circuit can be recognized by current measurement in the control center.
  • Detectors are connected to the individual distributors V1, V2, etc.
  • the detector D1 with its detector contact d1 is in the current path L12.
  • the detector D2 lies with its signaling contact d2 in the current path L22.
  • the respective contact is opened; this is recognized as an open circuit in the relevant line.
  • the sabotage line has a sabotage contact k or ds in each distributor V and in each detector D. These sabotage contacts open when the distributor or detector is manipulated, i.e. the housing is opened.
  • the individual current paths are forwarded from the control center to the distributors, between the distributors and from the distributors to the detectors via cables, the individual wires of which have different colors.
  • these colors are denoted, for example, by sw (black), ws (white), gn (green), bl (blue), ge (yellow) and rt (red).
  • sw black
  • ws white
  • gn green
  • bl blue
  • ge yellow
  • rt red
  • more colors or color combinations can be used.
  • the assignment of the individual colors to a specific current path is different in each cable section.
  • the current path L12 is connected between the control center Z and the distributor V1 with a white wire, from the distributor V1 to the detector D1 with a red and a black wire, from the distributor V1 to the distributor V2 with a blue wire, etc.
  • the order of the colors The individual distributor connections vary in each cable section in a different way. It can be determined, for example, by a random generator.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)

Abstract

Bei einer Meldeanlage werden die verschiedenfarbigen Adern der Verbindungskabel (SW, WS usw.) zwischen den einzelnen Verteilern (V1, V2 usw.) nach einer zufälligen Reihenfolge jeweils unterschiedlichen Strompfaden zugeordnet. Dadurch werden gezielte Manipulationen an den Verbindungsleitungen der Meldelinien verhindert.In a signaling system, the differently colored wires of the connecting cables (SW, WS etc.) between the individual distributors (V1, V2 etc.) are assigned to different current paths in a random order. This prevents targeted manipulations on the connecting lines of the detection lines.

Description

Die Erfindung bezieht sich auf eine Sicherheitsmeldeanla- ge mit einer Anzahl von Meldelinien mit jeweils zwei oder mehr von einer Zentrale ausgehenden Strompfaden, welche über Verteiler zum Anschluß von jeweils einem oder mehreren Detektoren geführt sind, wobei die einzelnen Strompfade von Verteiler zu Verteiler bzw. von je einem Verteiler zu den einzelnen Detektoren durch verschiedenfarbene Adern eines Kabels gebildet sind.The invention relates to a Sicherheitsmeldeanla- g e with a number of detector lines, each with two or more outgoing from a central current paths, which are guided via distributor for connecting each of one or more detectors, where the individual current paths from manifold to manifold, or from a distributor to the individual detectors are formed by differently colored wires of a cable.

Derartige Anlagen sind üblich. Dabei werden zur Kennzeichnung der einzelnen Strompfade Kabeladern mit unterschiedlichen Farben verwendet, um einerseits beim Aufbau der Anlage die einzelnen Meldelinien gezielt durchschalten und die einzelnen Melder richtig anschalten zu können und um andererseits bei Störungen in jedem Linienabschnitt die einzelnen Strompfade identifizieren zu können. Allerdings erleichtert diese Kennzeichnung der einzelnen Strompfade in Einbruchmeldeanlagen die gezielte Manipulation. So könnten etwa durch Kurzschließen bestimmter Leitungsabschnitte bestimmte Detektoren unwirksam gemacht werden. Um dies zu verhindern, werden bei bekannten Anlagen mit ruhestromüberwachten Leitungen in jedem Detektor Endwiderstände montiert. Wird ein solcher Detektor kurzgeschlossen, so führt die Widerstandsänderung auf der Leitung in der Zentrale zum Alarm. Allerdings wird durch die Größe der Endwiderstände die Anzahl der Detektoren begrenzt, welche maximal an eine Linie angeschlossen werden können.Such systems are common. Cable wires with different colors are used to identify the individual current paths so that, on the one hand, the individual detection lines can be specifically switched through when the system is being set up, the individual detectors can be switched on correctly, and, on the other hand, the individual current paths can be identified in the event of faults in each line section. However, this identification of the individual current paths in intrusion detection systems facilitates targeted manipulation. For example, by short-circuiting certain line sections certain detectors are rendered ineffective. In order to prevent this, in known systems with quiescent current monitored lines, terminal resistors are installed in each detector. If such a detector is short-circuited, the change in resistance on the line in the control center leads to an alarm. However, the size of the terminating resistors limits the number of detectors that can be connected to a maximum of one line.

Aufgabe der Erfindung ist es, eine Sicherheitsmeldeanlage der eingangs erwähnten Art sabotagesicher zu gestalten, ohne daß zu diesem Zweck die einzelnen Detektoren mit zusätzlichen Einrichtungen, wie Endwiderständen, ausgestattet werden müssen.The object of the invention is to design a security alarm system of the type mentioned at the outset against sabotage, without the individual detectors having to be equipped with additional devices such as terminal resistors for this purpose.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß die einzelnen mit bestimmten Farben gekennzeichneten Leitungsadern in jedem Kabelabschnitt jeweils anderen Strompfaden nach einer zufälligen Verteilung zugeordnet sind. Durch diesen erfindungsgemäßen Wechsel der Farbenzuordnung in den Kabelabschnitten zwischen den Verteilern ist für einen Außenstehenden keine Kennzeichnung der einzelnen Linien mehr erkennbar. Für Montage und Wartung bleibt jedoch die Linienkennzeichnung erhalten, da die bei Errichtung der Anlage gewählte Farbverteilung für jeden Leitungsabschnitt festgelegt und gespeichert werden kann.According to the invention, this object is achieved in that the individual line wires marked with specific colors are assigned to different current paths in each cable section according to a random distribution. As a result of this change of color assignment in the cable sections between the distributors according to the invention, the individual lines can no longer be identified by an outsider. However, the line marking is retained for assembly and maintenance, since the color distribution selected when the system was set up can be defined and saved for each line section.

Da die Verdrahtung in den einzelnen Verteilern festliegt,. könnte unter Umständen ein bestimmter Strompfad durch öff- . nen aller Verteiler verfolgt werden, was jedoch für einen unter Zeitdruck stehenden unbefugten Eindringling in der Regel zu aufwendig ist. Auch diese Möglichkeit kann jedoch ausgeschlossen werden, wenn in an sich bekannter Weise eine Sabotagelinie durch alle Verteiler geführt ist, welche bei einer Öffnung des Verteilers zu einer Alarmanzeige in der Zentrale führt.As the wiring in the individual distributors is fixed. could under certain circumstances a certain current path through open. all distributors are tracked, but this is usually too expensive for an unauthorized intruder under time pressure. However, this possibility can also be excluded if a sabotage line is routed through all distributors in a manner known per se is, which leads to an alarm display in the control center when the distributor is opened.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert.An embodiment of the invention is explained below with reference to the drawing.

Die Zeichnung zeigt den Aufbau einer Einbruchmeldeanlage mit einer Zentrale Z, an welche verschiedene Meldelinien ML1 bis MLm angeschaltet sind. In der Zentrale sind Einrichtungen zur Leitungsüberwachung sowie zur Alarmgabe und Anzeige in üblicher Weise vorgesehen. Im Beispiel sind ruhestromüberwachte Meldelinien mit je zwei Strompfaden vorgesehen, also die Meldelinie ML1 mit den Strompfaden L11 und L12, die Meldelinie ML2 mit den Strompfaden L21 und L22 usw. Je nach System können auch mehr Leitungen pro Meldelinie vorgesehen sein. Außer den Meldelinien ist noch eine Sabotagelinie SL mit den beiden Strompfaden S1 und S2 angeschaltet.The drawing shows the structure of an intruder alarm system with a control center Z, to which various alarm lines ML1 to MLm are connected. In the center, facilities for line monitoring as well as for alarming and displaying are provided in the usual way. In the example, quiescent current-monitored zones with two current paths each are provided, i.e. the ML1 line with the L11 and L12 current lines, the ML2 zone with the L21 and L22 current paths etc. Depending on the system, more lines per zone can also be provided. In addition to the signaling lines, a sabotage line SL with the two current paths S1 and S2 is switched on.

Die Strompfade der einzelnen Meldelinien ML und der Sabotagelinie SL sind von der Zentrale Z aus über mehrere Verteiler V1, V2 usw. bis zum Verteiler Vn weitergeschaltet. Im letzten Verteiler Vn ist die Stromschleife einer jeden Meldelinie über einen Endwiderstand R1, R2 usw. geschlossen. In der Zentrale Z wird dann an jede Meldelinie eine bestimmte Spannung angelegt, so daß über den jeweiligen Endwiderstand ein Ruhestrom bestimmter Größe fließt. Auf diese Weise ist in der Zentrale jede Leitungsunterbrechung wie auch jeder Leitungskurzschluß durch Strommessung erkennbar.The current paths of the individual detection lines ML and the sabotage line SL are switched from the central station Z via several distributors V1, V2 etc. to the distributor Vn. In the last distributor Vn, the current loop of each detection line is closed via a terminating resistor R1, R2 etc. A specific voltage is then applied to each signaling line in the control center Z, so that a quiescent current of a certain magnitude flows through the respective terminating resistor. In this way, every line interruption as well as every line short circuit can be recognized by current measurement in the control center.

An die einzelnen Verteiler V1, V2 usw. sind Detektoren angeschlossen. So liegt beispielsweise der Detektor D1 mit seinem Melderkontakt d1 im Strompfad L12. Der Detektor D2 liegt mit seinem Meldekontakt d2 im Strompfad L22. Beim Ansprechen des Detektors wird jeweils der betreffende Kontakt geöffnet; dies wird in der betreffenden Meldelinie als Leitungsunterbrechung erkannt. Außerdem besitzt die Sabotagelinie in jedem Verteiler V und in jedem Detektor D einen Sabotagekontakt k bzw. ds. Diese Sabotagekontakte öffnen sich jeweils dann, wenn am Verteiler oder am Melder manipuliert, also das Gehäuse geöffnet wird.Detectors are connected to the individual distributors V1, V2, etc. For example, the detector D1 with its detector contact d1 is in the current path L12. The detector D2 lies with its signaling contact d2 in the current path L22. When the detector responds, the respective contact is opened; this is recognized as an open circuit in the relevant line. In addition, the sabotage line has a sabotage contact k or ds in each distributor V and in each detector D. These sabotage contacts open when the distributor or detector is manipulated, i.e. the housing is opened.

Die Weiterschaltung der einzelnen Strompfade von der Zentrale zu den Verteilern, zwischen den Verteilern und von den Verteilern zu den Detektoren erfolgt über Kabel, deren einzelne Adern unterschiedliche Farben tragen. In der Zeichnung sind diese Farben beispielsweise mit sw (schwarz), ws (weiß), gn (grün), bl (blau), ge (gelb) und rt (rot)-bezeichnet. Je nach Anzahl der Strompfade können entsprechend mehr Farben oder Farbkombinationen verwendet werden. Die Zuordnung der einzelnen Farben zu einem bestimmten Strompfad ist jedoch in jedem Kabelabschnitt unterschiedlich. So ist der Strompfad L12 zwischen der Zentrale Z und dem Verteiler V1 mit einer weißen Ader geschaltet, vom Verteiler V1 zum Detektor D1 mit einer roten und einer schwarzen Ader, vom Verteiler V1 zum Verteiler V2 mit einer blauen Ader usw. Die Reihenfolge der Farben an den einzelnen Verteileranschlüssen variiert in jedem Kabelabschnitt in einer anderen Weise. Sie kann beispielsweise jeweils durch einen Zufallsgenerator ermittelt werden.The individual current paths are forwarded from the control center to the distributors, between the distributors and from the distributors to the detectors via cables, the individual wires of which have different colors. In the drawing, these colors are denoted, for example, by sw (black), ws (white), gn (green), bl (blue), ge (yellow) and rt (red). Depending on the number of current paths, more colors or color combinations can be used. The assignment of the individual colors to a specific current path is different in each cable section. The current path L12 is connected between the control center Z and the distributor V1 with a white wire, from the distributor V1 to the detector D1 with a red and a black wire, from the distributor V1 to the distributor V2 with a blue wire, etc. The order of the colors The individual distributor connections vary in each cable section in a different way. It can be determined, for example, by a random generator.

Auf diese Weise ist es für einen Unbefugten unmöglich, die Zuordnung der einzelnen Kabeladern zu einem bestimmten Detektor oder zu einer bestimmten Meldelinie zu verfolgen, ohne ein Verteilergehäuse zu öffnen und damit über die Sabotagelinie Alarm auszulösen. Für die Montage und die Wartung der Anlage ist es trotzdem möglich, die Zuordnung der einzelnen Xabeladern in jedem Abschnitt zu bestimmten Strompfaden festzuhalten und auf Listen oder in anderer Weise zu speichern.In this way, it is impossible for an unauthorized person to track the assignment of the individual cable cores to a specific detector or to a specific detection line without opening a distributor housing and thus triggering an alarm via the sabotage line. For the assembly and maintenance of the system, it is still possible to assign the individual Xabeladers in each section record certain current paths and save them on lists or in some other way.

Claims (2)

1. Sicherheitsmeldeanlage mit einer Anzahl von Meldelinien mit jeweils zwei oder mehr von einer Zentrale ausgehenden Strompfaden, welche über Verteiler zum Anschluß von jeweils einem oder mehreren Detektoren geführt sind, wobei die einzelnen Strompfade von Verteiler zu Verteiler bzw. vom Verteiler zu den einzelnen Detektoren durch verschiedenfarbene Adern eines Kabels gebildet sind, d a - durch gekennzeichnet , daß die einzelnen mit bestimmten Farben (sw, ws usw.) gekennzeichneten Leitungsadern in jedem Kabelabschnitt jeweils anderen Strompfaden (L11, L12 usw.) nach einer zufälligen Verteilung zugeordnet sind.1. Security detection system with a number of detection lines each with two or more current paths emanating from a control center, which are routed via distributors for connecting one or more detectors, the individual current paths from distributor to distributor or from distributor to the individual detectors Different colored wires of a cable are formed, since - characterized in that the individual line wires marked with certain colors (black, white, etc.) are assigned different current paths (L11, L12 etc.) in each cable section according to a random distribution. 2. Sicherheitsmeldeanlage nach Anspruch 1, dadurch gekennzeichnet , daß die einzelnen Verteilergehäuse durch eine zusätzliche, beim Öffnen des Gehäuses einen Alarm auslösende Sabotagelinie gesichert sind.2. Security alarm system according to claim 1, characterized in that the individual distributor housings are secured by an additional sabotage line which triggers an alarm when the housing is opened.
EP79102541A 1978-08-03 1979-07-18 Security signalling system Withdrawn EP0008023A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2834143 1978-08-03
DE19782834143 DE2834143A1 (en) 1978-08-03 1978-08-03 SECURITY REPORTING SYSTEM

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EP0008023A1 true EP0008023A1 (en) 1980-02-20

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EP79102541A Withdrawn EP0008023A1 (en) 1978-08-03 1979-07-18 Security signalling system

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EP (1) EP0008023A1 (en)
DE (1) DE2834143A1 (en)

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US4507644A (en) * 1983-03-10 1985-03-26 Custom Touch Electronics Touch responsive security and antitheft system
US5350885A (en) * 1992-04-08 1994-09-27 Monogram Industries, Inc. Armored cable
JP3255961B2 (en) * 1992-05-13 2002-02-12 秀治 小川 Information acquisition equipment for information wiring equipment
US6825418B1 (en) 2000-05-16 2004-11-30 Wpfy, Inc. Indicia-coded electrical cable
US8905108B2 (en) 2007-06-04 2014-12-09 Encore Wire Corporation Method and apparatus for applying labels to cable
US8347533B2 (en) 2007-10-11 2013-01-08 Southwire Company Machine applied labels to armored cable
US7812259B2 (en) * 2008-10-24 2010-10-12 Southwire Company Metal-clad cable with foraminous coded label
US8826960B1 (en) 2009-06-15 2014-09-09 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US7954530B1 (en) 2009-01-30 2011-06-07 Encore Wire Corporation Method and apparatus for applying labels to cable or conduit
US11319104B1 (en) 2009-01-30 2022-05-03 Encore Wire Corporation System and apparatus for applying labels to cable or conduit
US11031157B1 (en) 2013-08-23 2021-06-08 Southwire Company, Llc System and method of printing indicia onto armored cable

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US4274086A (en) 1981-06-16
DE2834143A1 (en) 1980-02-21

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