EP1246150B1 - Fire alarm system - Google Patents

Fire alarm system Download PDF

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Publication number
EP1246150B1
EP1246150B1 EP02005183A EP02005183A EP1246150B1 EP 1246150 B1 EP1246150 B1 EP 1246150B1 EP 02005183 A EP02005183 A EP 02005183A EP 02005183 A EP02005183 A EP 02005183A EP 1246150 B1 EP1246150 B1 EP 1246150B1
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EP
European Patent Office
Prior art keywords
communication
signal
communication pathway
evaluation circuit
fire alarm
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EP02005183A
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German (de)
French (fr)
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EP1246150A3 (en
EP1246150A2 (en
Inventor
Gerhard Röpke
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Job Lizenz GmbH and Co KG
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Job Lizenz GmbH and Co KG
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Publication of EP1246150A2 publication Critical patent/EP1246150A2/en
Publication of EP1246150A3 publication Critical patent/EP1246150A3/en
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
    • G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion

Definitions

  • the invention relates to a fire alarm system according to claim 1.
  • Fire alarm systems usually have a large number of individual detectors, in different places of a building or complex to be secured arranged and connected to a central office.
  • the connection of the detectors with The control center is usually via a branch or ring line, the so-called Communication mode, i. the transmission type of signals from the detectors to the control center and vice versa on DC technology or on digital signal technology can be based.
  • the communication string is a data bus, via which digital data words are transmitted from the detectors to the control center and vice versa.
  • the digital transmission technology naturally has the advantage that a Variety of individual digital words can be transmitted. So in the case an alarm signal not only this, but also transmit the address of the detector. Furthermore, an interference signal can be transmitted.
  • the central office Communicate with the individual detectors.
  • the detectors of such systems are in the simplest case push button or sensor-related elements, possibly with their own “intelligence”.
  • DE 42 19 555 A1 is in connection with an installation device of Building system known, subscriber stations or control units to a connect serial bus system.
  • data is also known wirelessly be fed into the bus system, for example by means of infrared transmitter and associated Infrared receiver.
  • the wireless transmission can also be done by others Media done, for example by radio or ultrasound.
  • Receiver of several transmitters which may be stationary or mobile, driven.
  • the electrical system of each transmitter is usually from a battery supplied, depending on the frequency of their operation a longer or shorter life having.
  • EP 0 803 850 A1 it has also become known two groups of detectors, one wire-wound and the other over Radio communicates with the communication line.
  • the individual for radio equipped detectors are powered by a battery.
  • the relay means has a microprocessor, the received detector signals in corresponding converts digital signals.
  • relay means is designed to be compatible with the Communication mode exists on the bus. They are different Communication buses have become known, even for fire alarm systems.
  • the invention has for its object to provide a fire alarm system or an expansion option for existing fire alarm systems, in the case of simple and little expensive way additional detectors to conventional wired Fire alarm systems can be coupled.
  • connection modules which can be arranged either releasably in the relay means and over suitable connection elements with the signal evaluation circuit and the wired Communication strand are connectable.
  • the connection modules are on adjusted the communication mode of communication strand. Become to For example, transfer digital signals, the connection module communicates with the Central via digital signals that can be "understood" by the central office. On the other hand, is the communication string a DC transmission, then the connection module ensures that according to the known Technology via current reduction or increase a signal transmission to the control center is accomplished.
  • the fire alarm system can therefore be a uniform relay means be provided with a receiver for wireless signal reception from the detectors, a power supply and a signal evaluation circuit. Only the connection module is to be selected with regard to the communication mode and insert into the relay means. This way can be done with simple Means an existing fire alarm system can be changed or supplemented, regardless of which type of communication is present on the communication string.
  • connection modules via a plug-in connection with the signal evaluation circuit and possibly with the power connection and possibly connectable to the communication string.
  • the connection of the relay means with the communication string through a fixed wiring.
  • the connection module be provided a uniform connection possibility for the connection module be. This requires that the location of the terminals and the Dimension forth the connection modules are also constructed uniformly.
  • the communication string is a direct current line, in which an alarm signal of a detector evaluated by the central office Current increase on the line causes and the connection module a series connection consisting of a switch and a resistor between the Heads of the line is connected, wherein the connection module is designed so that the Switch is closed when the signal evaluation circuit, a control signal is produced.
  • the fire alarm system therefore acts the relay means like a push button fire detector connected to a DC field line is.
  • Such fire alarm systems are still in use many times. It's also older, equipped with sensor elements fire alarm systems known a communication also via a DC line by current reduction or increase in current to accomplish.
  • Push button fire detectors that work mechanically are being mass-produced produced. Many of these push button fire detectors contain contacts and will later with "line” or “communication modules” to adapt to certain Fire detection lines or buses retrofitted. This fact exploits the invention, in which for adaptation to mechanically operated push button fire alarms on DC field lines Line modules or fire alarm buses are used. In the relay means, therefore, such a line module is used, then that Communication of wireless detectors used with the communication line becomes.
  • the module receives an interference signal from a wireless detector, which then goes to the control center is transmitted.
  • the communication line is a data bus.
  • the Connection module the signals received from the evaluation circuit to the communication mode the data bus converts adapted digital data words.
  • the Connection module is composed of two stages, the first of which with the Signal evaluation circuit is connected and a number of normally open Has switches, each associated with one of the decentralized second detector are and which are separately connected to the second stage and of which the second Stage is connected to the communication line designed as a data bus and when closing a switch, a digital signal on the communication string generated.
  • This embodiment makes use of the fact that components in the sense of second stage in connection with push-button fire detection systems are known. she allows the communication of a pushbutton fire alarm system via a data bus with a central office.
  • the embodiment according to the invention are in the first Stage analogous to push button fire detectors switch provided that will be closed when a second detector wirelessly sends an alarm signal.
  • the arrangement of Switch is such that each switch corresponds to a detector and therefore it is possible to identify the detector via the switch, which generates an alarm signal Has.
  • an interference signal message can be Verify by in the second stage a normally closed Switch is provided, which in reporting an interference signal from the evaluation circuit is opened. In this case, however, it is not possible to emit the interfering signal Identify detector.
  • connection options are available for pure pushbutton fire detection lines or buses available. It may be that a fire alarm system with regard to the capacity of the headquarters, d. H. the number of detectors or line is exhausted. Therefore, another communication strand with the head office get connected. Instead of using z. B. push button fire alarms
  • wireless detectors or wireless detectors are used, which then over Relay means communicate with the other communication line. Thereby can with remote from the surveillance area headquarters radio detectors with limited range are used.
  • radio detectors with limited range are used.
  • a fire detector 1 is shown, which via radio with an existing Fire alarm system can communicate.
  • the detector contains one or more Sensors that respond to fire characteristics.
  • a monitoring circuit 3 is provided, which monitors the sensor 2 and a battery 4, which supplies the sensor 2 and the evaluation circuit 3.
  • an RF transmitter 5 provided. Is emitted by the sensor 2, a signal that is due to the emergence or indicates the presence of a fire, it will be in the evaluation circuit 3 evaluated. Due to its control by the circuit 3 are the transmitter 5 an alarm signal to a relay station (not shown), which in turn is connected to a communication line, not shown, to the central office leads. A group of other fire detectors not shown is wired to the Communication strand connected.
  • a relay station 10 is shown schematically. It has a receiver 15 for the radio signal coming from the transmitter of a detector and a monitoring and Signalauswertesciens 13 for the radio signal.
  • a power supply 16 supplies the receiver 15 and the evaluation circuit and also Connection module 14, which will be described below.
  • the power supply 16 can be done either via a network or via a battery.
  • One from the Receiver 15 received alarm signal is processed in the evaluation circuit 13 and given to the connection module.
  • a DC line is connected to the not shown center of the fire alarm system connected and has two conductors. With the conductors of the DC line is a Series connection of a resistor R1 and a switch K1 connected. Of the Switch K1 is normally open. Another series connection of one Resistor R2 and a switch K2 is in the course of one of the two conductors. Of the Switch K2 is normally closed.
  • the direct current line is a plurality of fire detectors, not shown, wired coupled.
  • the relay station 10 can be a variety of wireless Detectors are coupled, the connection via radio with the relay station 10th produce. If one of the detectors, not shown, responds and sends an alarm signal, which is transmitted via the radio link to the relay station 10, causes the Monitoring circuit 13, a closing of the switch K1. This in turn causes a power increase, and the headquarters notes that in the field of wirelessly communicating Fire alarm is a fire. An identification of that Alarm signal emitting detector is not possible.
  • connection module 14 is a self-contained module that corresponds to the in Fig. 2 components shown releasably connectable, for example by suitable Connectors. It can therefore be replaced by another module, e.g. by one as shown in Fig. 3.
  • the connection module 21 has taken the place of the connection module 14, because a connection to produce a data bus 17 is.
  • the data bus allows in a known manner the communication of the control center with the wire-connected detectors on the one hand and with the relay station 20 via digital data words on the other hand. It goes without saying that this communication can also be bidirectional, if each transmitter and Receiver are provided in the radio detectors and the relay station 20.
  • connections between the data bus 12 and the structure the relay station 20 may be a fixed wire connection with connection possibility within the box 18 shown in Fig. 2 or Fig. 3, which is e.g. one Housing for the components can represent.
  • box 18 e.g. plug contacts or easily detachable contacts provided for connection to the respective connection module, here so either connection module 14 or Terminal module 21.
  • connection module 14 e.g. plug contacts or easily detachable contacts provided for connection to the respective connection module, here so either connection module 14 or Terminal module 21.
  • connection module 21 is designed so that it from the evaluation circuit 13th converts incoming signal into a suitable data word so that it is above the Data bus 17 can be transferred to the control center. Accordingly, a Fault be transmitted, which is also possible for the control center, the detector identify from which a signal originated. It is understood that among the above conditions the communication also takes place in the opposite direction The central office can therefore query the individual detectors for their condition.
  • Fig. 4 three wireless detectors 1A, 1B and 1C are shown. You can connect via radio the relay station 20a transmit signals.
  • the relay station 20a has a turn Receiver 15, an evaluation circuit 13 and a power supply 16, comparable that of the relay stations 10 and 20.
  • a module 22 is provided, the three switches K1A, K1B and K1C, each in series with an unnamed resistor.
  • the leading to the switches lines are led out of the housing 18 and may e.g. via suitable plug connections galvanically with a stage 30 which is designed to be responsive to one of said Switches into a suitable data word for the data bus 17 is converted.
  • the switches K1A to K1C are assigned to detectors 1A to 1C, i. if e.g. the detector 1B emits an alarm signal, the switch K1B closes. Since the switches K1A to K1C are assigned accordingly in the stage 30, contains the data word, which in the Stage 30 for the data bus 17 is formed, an information that it Switch K1B was closed, and thus the information that detector 1B has sent an alarm signal.
  • Another switch K5 in series with an unnamed resistor is also connected to the stage 30, and the stage 30 creates a Fault corresponding data word with address for the bus 17, if one of the Detector 1A to 1C, an interference signal is sent to the relay station 20a.

Abstract

The fire alarm system has battery (4) operated sensor units with sensors (2) and an output unit (3) with HF radio transmitter (5) or transmission on a DC line supply to a relay station which sends it to the control centre.

Description

Die Erfindung bezieht sich auf eine Brandmeldeanlage nach dem Anspruch 1.The invention relates to a fire alarm system according to claim 1.

Brandmeldeanlagen weisen üblicherweise eine Vielzahl von einzelnen Meldern auf, die an verschiedenen Orten eines zu sichernden Gebäudes oder Gebäudekomplexes angeordnet und mit einer Zentrale verbunden sind. Die Verbindung der Melder mit der Zentrale erfolgt in der Regel über eine Stich- oder Ringleitung, wobei der sogenannte Kommunikationsmode, d.h. die Übertragungsart von Signalen von den Meldern zur Zentrale und umgekehrt auf Gleichstromtechnik oder auf digitaler Signaltechnik beruhen kann. Im letzteren Fall ist der Kommunikationsstrang ein Datenbus, über den digitale Datenwörter von den Meldern zur Zentrale übertragen werden und umgekehrt. Die digitale Übertragungstechnik hat naturgemäß den Vorteil, dass eine Vielzahl von einzelnen Digitalwörtern übertragen werden kann. So wird im Falle eines Alarmsignals nicht nur dieses, sondern auch die Adresse des Melders übertragen. Ferner kann ein Störsignal übertragen werden. Umgekehrt kann die Zentrale mit den einzelnen Meldern kommunizieren.Fire alarm systems usually have a large number of individual detectors, in different places of a building or complex to be secured arranged and connected to a central office. The connection of the detectors with The control center is usually via a branch or ring line, the so-called Communication mode, i. the transmission type of signals from the detectors to the control center and vice versa on DC technology or on digital signal technology can be based. In the latter case the communication string is a data bus, via which digital data words are transmitted from the detectors to the control center and vice versa. The digital transmission technology naturally has the advantage that a Variety of individual digital words can be transmitted. So in the case an alarm signal not only this, but also transmit the address of the detector. Furthermore, an interference signal can be transmitted. Conversely, the central office Communicate with the individual detectors.

Die Melder derartiger Systeme sind im einfachsten Fall Druckknopfmelder oder sensorbehaftete Elemente, ggf. mit eigener "Intelligenz".The detectors of such systems are in the simplest case push button or sensor-related elements, possibly with their own "intelligence".

Wie in der EP 0 803 850 A1 erläutert, garantiert eine drahtgebundene Verbindung zwischen Zentrale und den einzelnen Meldern zwar eine hohe Übertragungssicherheit, macht aber die Anlage verhältnismäßig unflexibel für Änderungen einer einmal gewählten Raumaufteilung oder der Funktion und/oder Belegung von Räumen. Derartige Änderungen führen normalerweise dazu, dass einzelne Melder den Standort wechseln, was wegen der dann erforderlichen Verdrahtung mit umfangreichen und störenden Installationsarbeiten verbunden ist. Auch eine nachträgliche Erweiterung von Brandmeldeanlagen mit Drahtleitungen zwischen dem normalerweise als Kabel ausgelegten Kommunikationsstrang und den Meldern gestaltet sich unter Umständen aufwändig. Daher ist aus der obigen erwähnten Druckschrift bekannt, die Melder mit den Drähten des Kommunikationsstrangs wahlweise über einen drahtgebundenen oder einen drahtlosen Kanal zu verbinden, im letzteren Fall zum Beispiel mit Hilfe eines Funksystems. Mit dem Kommunikationsstrang ist ein Relaismittel gekoppelt, das einen Empfänger für die drahtlos sendenden Melder aufweist.As explained in EP 0 803 850 A1, a wired connection is guaranteed between the control center and the individual detectors, a high level of transmission reliability, But makes the system relatively inflexible for changes one time selected room layout or the function and / or occupancy of rooms. such Changes usually cause individual detectors to change the location switch, which is because of the then required wiring with extensive and disturbing installation work is connected. Also a subsequent extension of fire alarm systems with wire cables between the normally as a cable designed communication line and the detectors designed under certain circumstances consuming. Therefore, it is known from the above-mentioned document, the detector with the wires of the communication strand either via a wired or to connect a wireless channel, in the latter case, for example, with the help a radio system. The communication string is coupled to a relay means, which has a receiver for the wireless sending detectors.

Aus DE 42 19 555 A1 ist in Verbindung mit einer Installationseinrichtung der Gebäudesystemtechnik bekannt, Teilnehmerstationen bzw. Steuergeräte an ein serielles Bussystem anzuschließen. Hierbei ist ferner bekannt, Daten auch drahtlos in das Bussystem einzuspeisen, beispielsweise mittels Infrarotsender und zugeordnetem Infrarotempfänger. Die drahtlose Übertragung kann auch durch andere Medien erfolgen, beispielsweise durch Funk oder Ultraschall. In der Regel wird ein Empfänger von mehreren Sendern, die stationär oder mobil angeordnet sein können, angesteuert. Das Bordnetz der einzelnen Sender wird in der Regel von einer Batterie versorgt, die je nach Häufigkeit ihrer Betätigung eine längere oder kürzere Lebensdauer aufweist.DE 42 19 555 A1 is in connection with an installation device of Building system known, subscriber stations or control units to a connect serial bus system. In this case, data is also known wirelessly be fed into the bus system, for example by means of infrared transmitter and associated Infrared receiver. The wireless transmission can also be done by others Media done, for example by radio or ultrasound. In general, one will Receiver of several transmitters, which may be stationary or mobile, driven. The electrical system of each transmitter is usually from a battery supplied, depending on the frequency of their operation a longer or shorter life having.

Aus der bereits erwähnten EP 0 803 850 A1 ist auch bekannt geworden, zwei Gruppen von Meldern vorzusehen, von denen die eine drahtbehaftet und die andere über Funk mit dem Kommunikationsstrang in Verbindung steht. Die einzelnen für Funk ausgestatteten Melder sind über eine Batterie mit Energie versorgt. Das Relaismittel weist einen Mikroprozessor auf, der empfangene Meldersignale in entsprechende digitale Signale umwandelt. From the already mentioned EP 0 803 850 A1 it has also become known two groups of detectors, one wire-wound and the other over Radio communicates with the communication line. The individual for radio equipped detectors are powered by a battery. The relay means has a microprocessor, the received detector signals in corresponding converts digital signals.

Es versteht sich, dass das Relaismittel so ausgelegt ist, dass eine Kompatibilität zum Kommunikationsmode auf dem Bus besteht. Es sind verschiedene unterschiedliche Kommunikationsbusse bekannt geworden, auch bereits für Brandmeldeanlagen.It is understood that the relay means is designed to be compatible with the Communication mode exists on the bus. They are different Communication buses have become known, even for fire alarm systems.

Bei älteren, heute noch betriebsbereiten Brandmeldeanlagen finden Gleichstromübertragungen statt nach dem Stromerhöhungs- oder Stromschwächungsprinzip.Older, still operational fire alarm systems find DC transmissions instead of the current increase or current suppression principle.

Der Erfindung liegt die Aufgabe zugrunde, eine Brandmeldeanlage zu schaffen bzw. eine Erweiterungsmöglichkeit für bestehende Brandmeldeanlagen, bei der in einfacher und wenig aufwändiger Weise zusätzliche Melder an herkömmliche drahtgebundene Brandmeldeanlagen gekoppelt werden können.The invention has for its object to provide a fire alarm system or an expansion option for existing fire alarm systems, in the case of simple and little expensive way additional detectors to conventional wired Fire alarm systems can be coupled.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Erfindungsgemäß ist ein Satz von unterschiedlichen Anschlussmodulen vorgesehen, die wahlweise lösbar in den Relaismitteln angeordnet werden können und über geeignete Anschlusselemente mit der Signalauswerteschaltung und dem drahtgebundenen Kommunikationsstrang verbindbar sind. Die Anschlussmodule sind an den Kommunikationsmode des Kommunikationsstrangs angepasst. Werden zum Beispiel digitale Signale übertragen, kommuniziert das Anschlussmodul mit der Zentrale über digitale Signale, die von der Zentrale "verstanden" werden können. Handelt es sich hingegen bei dem Kommunikationsstrang um eine Gleichstromübertragung, dann sorgt das Anschlussmodul dafür, dass entsprechend der bekannten Technik über Stromabsenkung oder -erhöhung eine Signalübertragung auf die Zentrale bewerkstelligt wird.According to the invention, a set of different connection modules is provided, which can be arranged either releasably in the relay means and over suitable connection elements with the signal evaluation circuit and the wired Communication strand are connectable. The connection modules are on adjusted the communication mode of communication strand. Become to For example, transfer digital signals, the connection module communicates with the Central via digital signals that can be "understood" by the central office. On the other hand, is the communication string a DC transmission, then the connection module ensures that according to the known Technology via current reduction or increase a signal transmission to the control center is accomplished.

Bei der erfindungsgemäßen Brandmeldeanlage kann daher ein einheitliches Relaismittel vorgesehen werden mit einem Empfänger für den drahtlosen Signalempfang von den Meldern, einer Stromversorgung und einer Signalauswerteschaltung. Lediglich das Anschlussmodul ist im Hinblick auf den Kommunikationsmode auszuwählen und in das Relaismittel einzusetzen. Auf diese Weise kann mit einfachen Mitteln eine bestehende Brandmeldeanlage geändert oder ergänzt werden, unabhängig davon, welche Kommunikationsart auf dem Kommunikationsstrang vorliegt.In the fire alarm system according to the invention can therefore be a uniform relay means be provided with a receiver for wireless signal reception from the detectors, a power supply and a signal evaluation circuit. Only the connection module is to be selected with regard to the communication mode and insert into the relay means. This way can be done with simple Means an existing fire alarm system can be changed or supplemented, regardless of which type of communication is present on the communication string.

In einer Ausgestaltung der Erfindung ist vorgesehen, dass die Anschlussmodule über eine Steckverbindung mit der Signalauswerteschaltung und ggf. mit der Stromverbindung und ggf. mit dem Kommunikationsstrang verbindbar sind. Zweckmäßigerweise erfolgt die Verbindung des Relaismittels mit dem Kommunikationsstrang durch eine feste Verdrahtung. Innerhalb des Aufbaus des Relaismittels kann jedoch eine einheitlich hergestellte Verbindungsmöglichkeit für das Anschlussmodul vorgesehen sein. Hierzu ist erforderlich, dass von der Lage der Anschlusskontakte und der Abmessung her die Anschlussmodule ebenfalls einheitlich aufgebaut sind.In one embodiment of the invention it is provided that the connection modules via a plug-in connection with the signal evaluation circuit and possibly with the power connection and possibly connectable to the communication string. Conveniently, the connection of the relay means with the communication string through a fixed wiring. However, within the structure of the relay means provided a uniform connection possibility for the connection module be. This requires that the location of the terminals and the Dimension forth the connection modules are also constructed uniformly.

Nach einer Ausgestaltung der Erfindung ist der Kommunikationsstrang eine Gleichstromlinie, bei der ein Alarmsignal eines Melders eine von der Zentrale ausgewertete Stromerhöhung auf der Linie bewirkt und das Anschlussmodul eine Reihenschaltung aus einem Schalter und einem Widerstand aufweist, die zwischen den Leitern der Linie geschaltet ist, wobei das Anschlussmodul so ausgelegt ist, dass der Schalter geschlossen wird, wenn von der Signalauswerteschaltung ein Steuersignal erzeugt wird. Im Hinblick auf die Brandmeldeanlage wirkt daher das Relaismittel wie ein Druckknopffeuermelder, der an eine Gleichstrommeldelinie angeschlossen ist. Derartige Brandmeldeanlagen sind noch vielfach im Einsatz. Auch ist es bei älteren, mit Sensorelementen ausgerüsteten Brandmeldeanlagen bekannt, eine Kommunikation ebenfalls über eine Gleichstromlinie durch Stromabsenkung oder Stromerhöhung zu bewerkstelligen. According to one embodiment of the invention, the communication string is a direct current line, in which an alarm signal of a detector evaluated by the central office Current increase on the line causes and the connection module a series connection consisting of a switch and a resistor between the Heads of the line is connected, wherein the connection module is designed so that the Switch is closed when the signal evaluation circuit, a control signal is produced. With regard to the fire alarm system therefore acts the relay means like a push button fire detector connected to a DC field line is. Such fire alarm systems are still in use many times. It's also older, equipped with sensor elements fire alarm systems known a communication also via a DC line by current reduction or increase in current to accomplish.

Druckknopffeuermelder, die mechanisch arbeiten, werden in großen Stückzahlen hergestellt. Viele dieser Druckknopffeuermelder enthalten Kontakte und werden später mit "Linien-" bzw. "Komunikationsmodulen" zur Anpassung an bestimmte Brandmeldelinien oder -busse nachgerüstet. Diese Tatsache nutzt die Erfindung aus, in dem zur Anpassung an mechanisch arbeitende Druckknopffeuermelder an Gleichstrommeldelinien Linienmodule bzw. Brandmeldebusse zur Anwendung gelangen. In dem Relaismittel wird daher ein solches Linienmodul eingesetzt, daß dann zur Kommunikation der drahtlosen Melder mit dem Kommunikationsstrang verwendet wird.Push button fire detectors that work mechanically are being mass-produced produced. Many of these push button fire detectors contain contacts and will later with "line" or "communication modules" to adapt to certain Fire detection lines or buses retrofitted. This fact exploits the invention, in which for adaptation to mechanically operated push button fire alarms on DC field lines Line modules or fire alarm buses are used. In the relay means, therefore, such a line module is used, then that Communication of wireless detectors used with the communication line becomes.

Mit Hilfe der zuletzt erwähnten Ausführungsform lässt sich auch eine Störung der drahtlos angekoppelten Melder ermitteln, wenn das Anschlussmodul eine weitere Reihenschaltung aus einem Widerstand und einem Schalter aufweist, die im Zuge eines Leiters der Gleichstromlinie angeordnet ist und die den Leiter auftrennt, wenn das Modul von einem drahtlosen Melder ein Störsignal erhält, das dann zur Zentrale übertragen wird. Allerdings ist es nicht möglich, den Melder zu identifizieren, von dem das Störsignal ausgegangen ist.With the aid of the last-mentioned embodiment, a disturbance of the detect a wirelessly connected detector if the connection module has another Series connection of a resistor and a switch, which in the course a conductor of the DC line is arranged and which separates the conductor, if the module receives an interference signal from a wireless detector, which then goes to the control center is transmitted. However, it is not possible to identify the detector from the interference signal has gone out.

Bei neueren Brandmeldeanlagen ist der Kommunikationsstrang ein Datenbus. Hierfür wird nach einer Ausgestaltung der Erfindung vorgeschlagen, dass das Anschlussmodul die von der Auswerteschaltung erhaltenen Signale an den Kommunikationsmode des Datenbusses angepasste digitale Datenwörter umwandelt. Bei einer derartigen Kommunikation ist es naturgemäß möglich, eine direkte Signalverbindung zwischen einem einzelnen Melder und der Zentrale herzustellen, wenn die einzelnen Melder mit Adressen versehen sind. Umgekehrt kann auch eine Signalübertragung von der Zentrale auf einen oder alle Melder stattfinden. Hierfür ist notwendig, dass die Melder einen Empfänger aufweisen für die vom Sender des Relaismittels kommenden Signale. Es versteht sich, dass diese Kommunikation auch für Störungsfälle wirksam wird.In recent fire alarm systems, the communication line is a data bus. Therefor is proposed according to an embodiment of the invention that the Connection module the signals received from the evaluation circuit to the communication mode the data bus converts adapted digital data words. at It is of course possible for such a communication to have a direct signal connection between a single detector and the control panel, if the individual detectors are provided with addresses. Conversely, a can also Signal transmission from the control center to one or all detectors take place. Therefor it is necessary that the detectors have a receiver for the transmitter of the Relay means coming signals. It is understood that this communication too becomes effective for failure cases.

Nach einer anderen Ausgestaltung der Erfindung ist vorgesehen, dass das Anschlussmodul aus zwei Stufen zusammengesetzt ist, von denen die erste mit der Signalauswerteschaltung verbunden ist und eine Reihe von normalerweise geöffneten Schaltern aufweist, die jeweils einem der dezentralen zweiten Melder zugeordnet sind und die separat mit der zweiten Stufe verbunden sind und von denen die zweite Stufe mit dem als Datenbus ausgeführten Kommunikationsstrang verbunden ist und bei Schließen eines Schalters ein digitales Signal auf dem Kommunikationsstrang erzeugt. Diese Ausgestaltung macht sich zunutze, dass Komponenten im Sinne der zweiten Stufe in Verbindung mit Druckknopffeuermeldeanlagen bekannt sind. Sie erlaubt die Kommunikation einer Druckknopffeuermeldeanlage über einen Datenbus mit einer Zentrale. Bei der erfindungsgemäßen Ausgestaltung sind in der ersten Stufe analog zu Druckknopffeuermeldern Schalter vorgesehen, die geschlossen werden, wenn ein zweiter Melder drahtlos ein Alarmsignal sendet. Die Anordnung der Schalter ist derart, dass jeder Schalter einem Melder entspricht und daher ist es möglich, den Melder über den Schalter zu identifizieren, der ein Alarmsignal erzeugt hat.According to another embodiment of the invention, it is provided that the Connection module is composed of two stages, the first of which with the Signal evaluation circuit is connected and a number of normally open Has switches, each associated with one of the decentralized second detector are and which are separately connected to the second stage and of which the second Stage is connected to the communication line designed as a data bus and when closing a switch, a digital signal on the communication string generated. This embodiment makes use of the fact that components in the sense of second stage in connection with push-button fire detection systems are known. she allows the communication of a pushbutton fire alarm system via a data bus with a central office. In the embodiment according to the invention are in the first Stage analogous to push button fire detectors switch provided that will be closed when a second detector wirelessly sends an alarm signal. The arrangement of Switch is such that each switch corresponds to a detector and therefore it is possible to identify the detector via the switch, which generates an alarm signal Has.

Auch bei der zuletzt beschriebenen Ausführungsform lässt sich eine Störsignalmeldung verifizieren, indem in der zweiten Stufe ein normalerweise geschlossener Schalter vorgesehen ist, der bei Meldung eines Störsignals von der Auswerteschaltung geöffnet wird. In diesem Falle lässt sich jedoch nicht der das Störsignal abgebende Melder identifizieren.Even with the last-described embodiment, an interference signal message can be Verify by in the second stage a normally closed Switch is provided, which in reporting an interference signal from the evaluation circuit is opened. In this case, however, it is not possible to emit the interfering signal Identify detector.

In vielen Brandmeldezentalen sind Anschlußmöglichkeiten für reine Druckknopffeuermeldelinien bzw. -busse vorhanden. Es kann sein, daß eine Brandmeldeanlage im Hinblick auf die Kapazität der Zentrale, d. h. die Anzahl der Melder bzw. Linie ausgeschöpft ist. Daher kann ein weiterer Kommunikationsstrang mit der Zentrale verbunden werden. Statt der Verwendung von z. B. Druckknopffeuermeldem können jedoch Funkmelder bzw. drahtlose Melder eingesetzt werden, die dann über Relaismittel mit dem weiteren Kommunikationsstrang kommunizieren. Dadurch können bei vom Überwachungsbereich entfernteren Zentrale Funkmelder mit begrenzter Reichweite eingesetzt werden. Es werden daher zwei Vorteile erhalten, nämlich zum einen die Erweiterung einer bestehenden Anlage überhaupt und zum zweiten eine Erweiterung mit drahtlosen Meldern, welche einen deutlich geringeren Installationsaufwand erfordern. Naturgemäß kann auch bei neu installierten Brandmeldeanlagen die Möglichkeit wahrgenommen werden, anstelle von Druckknopffeuermeldern bei Bedarf funkbetriebene Brandmelder und Relaisstationen anschließbar zu machen.In many fire alarm centers, connection options are available for pure pushbutton fire detection lines or buses available. It may be that a fire alarm system with regard to the capacity of the headquarters, d. H. the number of detectors or line is exhausted. Therefore, another communication strand with the head office get connected. Instead of using z. B. push button fire alarms However, wireless detectors or wireless detectors are used, which then over Relay means communicate with the other communication line. Thereby can with remote from the surveillance area headquarters radio detectors with limited range are used. There are therefore two advantages namely on the one hand, the extension of an existing system and the second an extension with wireless detectors, which is a much lower Require installation effort. Naturally, even with newly installed fire alarm systems the possibility to be perceived, instead of push button fire detectors If required, radio-operated fire detectors and relay stations to make connectable.

Wenn obenstehend von Schaltern gesprochen wird, versteht sich, dass darunter mechanische oder elektronische Schalter gemeint sind.When speaking of switches above, it goes without saying that underneath mechanical or electronic switches are meant.

Die erfindungsgemäße Brandmeldeanlage wird anhand von Ausführungsbeispielen näher erläutert.

Fig. 1
zeigt den grundsätzlichen Aufbau eines funkbetriebenen Brandmelders.
Fig. 2
zeigt den schematischen Aufbau einer Relaisstation für funkbetriebene Brandmelder zur Verbindung mit einem gleichstrombetriebenen Kommunikationsstrang.
Fig. 3
zeigt schematisch den Aufbau einer Relaisstation zur Verbindung mit einem als Datenbus ausgeführten Kommunikationsstrang.
Fig. 4
zeigt eine besondere Ausgestaltung einer Relaisstation.
The fire alarm system according to the invention will be explained in more detail with reference to embodiments.
Fig. 1
shows the basic structure of a radio-operated fire detector.
Fig. 2
shows the schematic structure of a relay station for radio-operated fire detector for connection to a DC-powered communication string.
Fig. 3
schematically shows the structure of a relay station for connection to a communication line designed as a data bus.
Fig. 4
shows a particular embodiment of a relay station.

In Fig. 1 ist ein Brandmelder 1 dargestellt, der über Funk mit einer vorhandenen Brandmeldeanlage kommunizieren kann. Der Melder enthält einen oder mehrere Sensoren, welche auf Brandkenngrößen ansprechen. Ferner ist eine Überwachungsschaltung 3 vorgesehen, welche den Sensor 2 überwacht sowie eine Batterie 4, welche den Sensor 2 und die Auswerteschaltung 3 versorgt. Schließlich ist ein HF-Sender 5 vorgesehen. Wird vom Sensor 2 ein Signal abgegeben, das auf das Entstehen oder das Vorhandensein eines Brandes hinweist, wird es in der Auswerteschaltung 3 ausgewertet. Aufgrund seiner Ansteuerung durch die Schaltung 3 gibt der Sender 5 ein Alarmsignal auf eine Relaisstation (nicht gezeigt), welche ihrerseits mit einem nicht gezeigten Kommunikationsstrang verbunden ist, der zur Zentrale führt. Eine Gruppe weiterer nicht gezeigter Brandmelder ist drahtbehaftet mit dem Kommunikationsstrang verbunden.In Fig. 1, a fire detector 1 is shown, which via radio with an existing Fire alarm system can communicate. The detector contains one or more Sensors that respond to fire characteristics. Further, a monitoring circuit 3 is provided, which monitors the sensor 2 and a battery 4, which supplies the sensor 2 and the evaluation circuit 3. Finally, an RF transmitter 5 provided. Is emitted by the sensor 2, a signal that is due to the emergence or indicates the presence of a fire, it will be in the evaluation circuit 3 evaluated. Due to its control by the circuit 3 are the transmitter 5 an alarm signal to a relay station (not shown), which in turn is connected to a communication line, not shown, to the central office leads. A group of other fire detectors not shown is wired to the Communication strand connected.

In Fig. 2 ist eine Relaisstation 10 schematisch dargestellt. Sie weist einen Empfänger 15 für das vom Sender eines Melders kommende Funksignal auf und eine Überwachungs- und Signalauswerteschaltung 13 für das Funksignal. Eine Stromversorgung 16 versorgt den Empfänger 15 und die Auswerteschaltung und auch ein Anschlussmodul 14, das nachfolgend noch beschrieben wird. Die Stromversorgung 16 kann entweder über ein Netz oder auch über eine Batterie erfolgen. Ein vom Empfänger 15 empfangenes Alarmsignal wird in der Auswerteschaltung 13 aufbereitet und auf das Anschlussmodul gegeben.In Fig. 2, a relay station 10 is shown schematically. It has a receiver 15 for the radio signal coming from the transmitter of a detector and a monitoring and Signalauswerteschaltung 13 for the radio signal. A power supply 16 supplies the receiver 15 and the evaluation circuit and also Connection module 14, which will be described below. The power supply 16 can be done either via a network or via a battery. One from the Receiver 15 received alarm signal is processed in the evaluation circuit 13 and given to the connection module.

Eine Gleichstromlinie ist mit der nicht gezeigten Zentrale der Brandmeldeanlage verbunden und weist zwei Leiter auf. Mit den Leitern der Gleichstromlinie ist eine Reihenschaltung aus einem Widerstand R1 und einem Schalter K1 verbunden. Der Schalter K1 ist normalerweise offen. Eine weitere Reihenschaltung aus einem Widerstand R2 und einem Schalter K2 liegt im Zuge einer der beiden Leiter. Der Schalter K2 ist normalerweise geschlossen.A DC line is connected to the not shown center of the fire alarm system connected and has two conductors. With the conductors of the DC line is a Series connection of a resistor R1 and a switch K1 connected. Of the Switch K1 is normally open. Another series connection of one Resistor R2 and a switch K2 is in the course of one of the two conductors. Of the Switch K2 is normally closed.

Mit der Gleichstromlinie ist eine nicht gezeigte Mehrzahl von Brandmeldern drahtgebunden gekoppelt. Die Kommunikation zwischen diesen Brandmeldern und der nicht gezeigten Zentrale erfolgt durch Stromsignale, d.h. durch Stromabschwächung oder Stromerhöhung. Mit der Relaisstation 10 kann eine Vielzahl von drahtlosen Meldern gekoppelt werden, die über Funk die Verbindung mit der Relaisstation 10 herstellen. Spricht einer der nicht gezeigten Melder an und sendet ein Alarmsignal, das über die Funkstrecke auf die Relaisstation 10 übertragen wird, bewirkt die Überwachungsschaltung 13 ein Schließen des Schalters K1. Dies bewirkt seinerseits eine Stromerhöhung, und die Zentrale stellt fest, dass im Bereich der drahtlos kommunizierenden Brandmelder ein Brandfall vorliegt. Eine Identifizierung des das Alarmsignal abgebenden Melders ist nicht möglich.With the direct current line is a plurality of fire detectors, not shown, wired coupled. The communication between these fire detectors and the not shown, by means of current signals, i. through current reduction or electricity increase. With the relay station 10 can be a variety of wireless Detectors are coupled, the connection via radio with the relay station 10th produce. If one of the detectors, not shown, responds and sends an alarm signal, which is transmitted via the radio link to the relay station 10, causes the Monitoring circuit 13, a closing of the switch K1. This in turn causes a power increase, and the headquarters notes that in the field of wirelessly communicating Fire alarm is a fire. An identification of that Alarm signal emitting detector is not possible.

Sendet einer der Brandmelder, die mit der Relaisstation 10 über Funk koppelbar sind, ein Störsignal, wird der Schalter K2 geöffnet. Dies wird von der Zentrale festgestellt, und es kann mit Hilfe von Servicepersonal ermittelt werden, welcher der ein Störsignal meldenden Brandmelder von einer Störung betroffen ist.Sends one of the fire detectors, which can be coupled to the relay station 10 via radio are, an interference signal, the switch K2 is opened. This is determined by the central office, and it can be determined with the help of service personnel, which one of Disturbance signal reporting fire alarm is affected by a fault.

Das Anschlussmodul 14 ist ein in sich geschlossenes Modul, das mit den in Fig. 2 dargestellten Komponenten lösbar verbindbar ist, beispielsweise durch geeignete Steckverbindungen. Es kann daher durch ein anderes Modul ausgetauscht werden, z.B. durch eines wie es in Fig. 3 dargestellt ist.The connection module 14 is a self-contained module that corresponds to the in Fig. 2 components shown releasably connectable, for example by suitable Connectors. It can therefore be replaced by another module, e.g. by one as shown in Fig. 3.

Die Relaisstation 20 nach Fig. 3 weist mit Ausnahme des Anschlussmoduls 21 gleiche Komponenten wie die Relaisstation 10 auf. Sie enthält nämlich den Empfänger 15 und die Auswerteschaltung 13 und die Stromversorgung 16. Das Anschlussmodul 21 ist an die Stelle des Anschlussmoduls 14 getreten, weil eine Verbindung zu einem Datenbus 17 herzustellen ist. Der Datenbus ermöglicht in bekannter Weise die Kommunikation der Zentrale mit den drahtverbundenen Meldern einerseits und mit der Relaisstation 20 über digitale Datenwörter andererseits. Es versteht sich, dass diese Kommunikation auch bidirektional sein kann, wenn jeweils Sender und Empfänger in den Funkmeldern und der Relaisstation 20 vorgesehen sind.The relay station 20 of FIG. 3, with the exception of the connection module 21st same components as the relay station 10. It contains the recipient 15 and the evaluation circuit 13 and the power supply 16. The connection module 21 has taken the place of the connection module 14, because a connection to produce a data bus 17 is. The data bus allows in a known manner the communication of the control center with the wire-connected detectors on the one hand and with the relay station 20 via digital data words on the other hand. It goes without saying that this communication can also be bidirectional, if each transmitter and Receiver are provided in the radio detectors and the relay station 20.

Es versteht sich, dass die Verbindungen zwischen dem Datenbus 12 und dem Aufbau der Relaisstation 20 eine feste Drahtverbindung sein kann mit Anschlussmöglichkeit innerhalb des in Fig. 2 oder Fig. 3 dargestellten Kastens 18, der z.B. ein Gehäuse für die Komponenten darstellen kann. In dem Kasten 18 sind z.B. Steckkontakte oder leicht lösbare Kontakte vorgesehen zwecks Verbindung mit dem jeweiligen Anschlussmodul, hier also wahlweise Anschlussmodul 14 oder Anschlussmodul 21. Es versteht sich aber, dass so viele unterschiedliche Anschlussmodule vorgesehen sein können, wie Kommunikationssysteme bei Brandmeldeanlagen verbreitet sind.It is understood that the connections between the data bus 12 and the structure the relay station 20 may be a fixed wire connection with connection possibility within the box 18 shown in Fig. 2 or Fig. 3, which is e.g. one Housing for the components can represent. In box 18, e.g. plug contacts or easily detachable contacts provided for connection to the respective connection module, here so either connection module 14 or Terminal module 21. However, it is understood that so many different Connection modules can be provided, such as communication systems Fire alarm systems are common.

Das Anschlussmodul 21 ist so ausgeführt, dass es das von der Auswerteschaltung 13 kommende Signal in ein geeignetes Datenwort umwandelt, damit es über dem Datenbus 17 auf die Zentrale übertragen werden kann. Entsprechend kann auch eine Störung übertragen werden, wobei für die Zentrale auch möglich ist, den Melder zu identifizieren, von dem ein Signal ausgegangen ist. Es versteht sich, dass unter den obigen Voraussetzungen die Kommunikation auch in umgekehrter Richtung erfolgen kann, mithin die Zentrale die einzelnen Melder auf ihren Zustand abfragen kann.The connection module 21 is designed so that it from the evaluation circuit 13th converts incoming signal into a suitable data word so that it is above the Data bus 17 can be transferred to the control center. Accordingly, a Fault be transmitted, which is also possible for the control center, the detector identify from which a signal originated. It is understood that among the above conditions the communication also takes place in the opposite direction The central office can therefore query the individual detectors for their condition.

In Fig. 4 sind drei Funkmelder 1A, 1B und 1C dargestellt. Sie können über Funk an die Relaisstation 20a Signale übermitteln. Die Relaisstation 20a hat wiederum einen Empfänger 15, eine Auswerteschaltung 13 und eine Stromversorgung 16, vergleichbar der der Relaisstationen 10 und 20. Statt eines Anschlussmoduls 14 oder 21 nach den Figuren 2 und 3 ist ein Modul 22 vorgesehen, das drei Schalter K1A, K1B und K1C aufweist, die jeweils in Reihe mit einem nicht bezeichneten Widerstand liegen. Die zu den Schaltern führenden Leitungen sind aus dem Gehäuse 18 herausgeführt und können z.B. über geeignete Steckverbindungen galvanisch mit einer Stufe 30 verbunden werden, die so ausgelegt ist, dass sie das Ansprechen eines der genannten Schalter in ein geeignetes Datenwort für den Datenbus 17 umwandelt. Die Schalter K1A bis K1C sind den Meldern 1A bis 1C zugeordnet, d.h. wenn z.B. der Melder 1B ein Alarmsignal abgibt, schließt der Schalter K1B. Da die Schalter K1A bis K1C in der Stufe 30 entsprechend zugeordnet sind, enthält das Datenwort, welches in der Stufe 30 für den Datenbus 17 gebildet wird, eine Information darüber, dass es Schalter K1B war, der geschlossen hat und somit die Information, dass Melder 1B ein Alarmsignal gesendet hat.In Fig. 4, three wireless detectors 1A, 1B and 1C are shown. You can connect via radio the relay station 20a transmit signals. The relay station 20a has a turn Receiver 15, an evaluation circuit 13 and a power supply 16, comparable that of the relay stations 10 and 20. Instead of a connection module 14 or 21 to Figures 2 and 3, a module 22 is provided, the three switches K1A, K1B and K1C, each in series with an unnamed resistor. The leading to the switches lines are led out of the housing 18 and may e.g. via suitable plug connections galvanically with a stage 30 which is designed to be responsive to one of said Switches into a suitable data word for the data bus 17 is converted. The switches K1A to K1C are assigned to detectors 1A to 1C, i. if e.g. the detector 1B emits an alarm signal, the switch K1B closes. Since the switches K1A to K1C are assigned accordingly in the stage 30, contains the data word, which in the Stage 30 for the data bus 17 is formed, an information that it Switch K1B was closed, and thus the information that detector 1B has sent an alarm signal.

Ein weiterer Schalter K5, der in Reihe mit einem nicht bezeichneten Widerstand liegt, ist ebenfalls mit der Stufe 30 verbunden, und die Stufe 30 erzeugt ein einer Störung entsprechendes Datenwort mit Adresse für den Bus 17, wenn von einem der Melder 1A bis 1C ein Störsignal auf die Relaisstation 20a gesendet wird.Another switch K5, in series with an unnamed resistor is also connected to the stage 30, and the stage 30 creates a Fault corresponding data word with address for the bus 17, if one of the Detector 1A to 1C, an interference signal is sent to the relay station 20a.

Claims (10)

  1. A fire alarm system, comprising:
    a control centre,
    a wire-bound communication pathway (17) connected to the control centre,
    relay means (10, 20, 20a) which are connected to the communication pathway (17) and have a receiver (15) and a signal evaluation circuit (13),
    first decentralized alarm boxes which are connected to the communication pathway (17) in a wire-bound manner,
    second decentralized alarm boxes (1, 1A, 1B, 1C) which are adapted to be coupled to the receiver (15) of the relay means (10, 20, 20a) via a wireless channel where the first and second alarm boxes, in case of fire, produce an alarm signal which is transmitted to the control centre via the communication pathway (17) by means of a predetermined communication mode, characterized by
    a set of separate different coupling modules (14, 21, 22, 30) which are disconnectably disposed in the relay means (10, 20, 20a) and are adapted to be connected to the signal evaluation circuit (13) and the communication pathway (17) via appropriate connecting elements with the coupling modules being designed for different communication modes.
  2. The fire alarm system according to claim 1, characterized in that the coupling modules (14, 21, 22, 30) are adapted to be connected to the signal evaluation circuit (13) and, in case of need, to the power supply unit (16).
  3. The fire alarm system according to claim 1 or 2, characterized in that the coupling modules (14, 21, 22, 30) are adapted to be connected mechanically and disconnectably to the signal evaluation circuit (13).
  4. The fire alarm system according to any one of claims 1 to 3, characterized in that the communication pathway is a direct-current line or a bus and the coupling module is a communication module for the connection of push-button fire alarm boxes to the direct-current alarm line or fire alarm buses.
  5. The fire alarm system according to claim 4, characterized in that the coupling module (14) has a series connection which is comprised of a resistor (R1) and a switch (K1) and is connected between the conductors of the line wherein the design of the coupling module (14) is such as to close the switch (K1) if the signal evaluation circuit (13) produces an alarm signal.
  6. The fire alarm system according to claim 5, characterized in that the coupling module (14) has disposed therein another series connection which is comprised of a resistor (R2) and a switch (K2) and which is arranged within the path of a conductor of the direct-current line, and that the switch (K2) is opened when it receives an trouble signal from the signal evaluation circuit (13).
  7. The fire alarm system according to any one of claims 1 to 6, characterized in that the communication pathway is a data bus (17) and the coupling module (21) converts the signals received from the evaluation circuit (13) into respective digital data words in the communication mode of the data bus (17).
  8. The fore alarm system according to claim 7, characterized in that the coupling module is composed of two stages (22, 30) the first of which is connected to the evaluation circuit (13) and has a series of normally opened switches (K1A to K1C) each of which is associated with a decentralized second alarm box (1A to 1C) and the second stage (30) of which is connected to the communication pathway designed as a data bus, and which produces a digital signal on the communication pathway upon closure of a switch (K1A to K1C).
  9. The fire alarm system according to claim 8, characterized in that the first stage (22) has a normally closed switch (K5) which is also connected to the second stage (30) and is opened if one of the second alarm boxes (1A to 1C) provides an trouble signal to the relay means (20a), whereupon the second stage (30) produces a digital trouble signal.
  10. A fire alarm system, comprising
    a control centre,
    a first wire-bound communication pathway (17) connected to a first connection of the control centre,
    a second wire-bound communication pathway connected to a second connection of the control centre,
    relay means (10, 20, 20a) which are connected to the second communication pathway (17) and have a receiver (15) and a signal evaluation circuit (13),
    first decentralized alarm boxes which are connected to the first communication pathway (17) in a wire-bound manner,
    second decentralized alarm boxes (1, 1A, 1B, 1C) which are adapted to be coupled to the receiver (15) of the relay means (10, 20, 20a) via a wireless channel where the first and second alarm boxes, in case of fire, produce an alarm signal which is transmitted to the control centre via the first and second communication pathways (17) by means of a predetermined communication mode,
    a coupling module (14, 21, 22, 30) which is disconnectably disposed in the relay means (10, 20, 20a) and is adapted to be connected to the signal evaluation circuit (13) and the second communication pathway (17) via appropriate connecting elements with the coupling module being designed for the communication mode of the second communication pathway.
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CN1383105A (en) 2002-12-04
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US20020145513A1 (en) 2002-10-10
US6727815B2 (en) 2004-04-27
EP1246150A3 (en) 2003-05-28
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EP1246150A2 (en) 2002-10-02
ATE293271T1 (en) 2005-04-15

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