DE3569997D1 - Annunciator identification arrangement in an alarm system - Google Patents

Annunciator identification arrangement in an alarm system

Info

Publication number
DE3569997D1
DE3569997D1 DE8585111385T DE3569997T DE3569997D1 DE 3569997 D1 DE3569997 D1 DE 3569997D1 DE 8585111385 T DE8585111385 T DE 8585111385T DE 3569997 T DE3569997 T DE 3569997T DE 3569997 D1 DE3569997 D1 DE 3569997D1
Authority
DE
Germany
Prior art keywords
annunciator
current
line
signal line
alarm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE8585111385T
Other languages
German (de)
Inventor
Peer Dr Ing Thilo
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
Original Assignee
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
Priority to DE8585111385T priority Critical patent/DE3569997D1/en
Application granted granted Critical
Publication of DE3569997D1 publication Critical patent/DE3569997D1/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G08B25/04—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 a single signalling line, e.g. in a closed loop
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B26/00—Alarm systems in which substations are interrogated in succession by a central station
    • G08B26/005—Alarm systems in which substations are interrogated in succession by a central station with substations connected in series, e.g. cascade

Abstract

1. Annunciator identification arrangement in an alarm system, in particular fire alarm system, having a plurality of closed-circuit protected, two-wire signal lines (ML) connected to a central unit (Z) with an evaluation device (AWE), to which signal lines in each case a plurality of annunciators (M1, M2, ...) are connected, an alarm-triggering annunciator causing a voltage dip in the corresponding line voltage (UL) as a result of a central limitation of the line current (IL) to a first current limit value, and an alarm signal of the corresponding signal line (ML) being derived therefrom in the central unit (Z), and the central unit (Z) outputting current pulses (IPZ) with a second, increased current limit value to the corresponding signal line (ML) characterized in that there is connected upstream of each annunciator (M1, M2, ...) an annunciator attachment circuit arrangement (MZS1, MZS2, ...) which has a bistable multivibrator (FF) having a setting input S which can be acted upon by a first differentiating element (R1, C1) connected to the signal line (ML) and having a reset input (R) which can be acted upon by a second differentiating element (R2, C2) connected to the signal line (ML) and having arranged in a wire (4, 5) of the signal line (ML) a switching element (TR) which can be controlled via a voltage limiter circuit (ZD) by the output (Q) of the bistable multivibrator (FF),the annunciator (M1, M2, ...) being connected to the signal line (ML) via light-emitting diode (LED), in that in the central unit (Z) there is assigned to the evaluation device (AWE) an annunciator identification circuit arrangement (MIS) which has a current measuring device (SME) for monitoring the line current (IL), an analog-digital converter (AD), the first input (E) of which is acted upon by the measured line current, and a microprocessor (MR) with a display device (ANZ) for the annunciator address connected downstream of the analog-digital converter (AD), the output (QW) of the analog-digital converter (AD) supplying the digitized current values to the microprocessor (MR), which controls a further input (F) of the analog-digital converter (AD) and which is acted upon by the central current pulses (IPZ) of the increased line current (flashing pulse), and in that, with each central current pulse (IPZ), in chronological order a limited (ZD) voltage is switched to the annunciator (M1, M2, ...) connected downstream of the respective annunciator attachment circuit arrangement (MZS1, MZS2, ...), the alarm-triggering annunciator causing an increased current flow, on the basis of which the annunciator identification circuit arrangement (MIS) determines and displays (ANZ) the address of the annunciator triggering the alarm.
DE8585111385T 1984-09-12 1985-09-09 Annunciator identification arrangement in an alarm system Expired DE3569997D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8585111385T DE3569997D1 (en) 1984-09-12 1985-09-09 Annunciator identification arrangement in an alarm system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3433479 1984-09-12
DE8585111385T DE3569997D1 (en) 1984-09-12 1985-09-09 Annunciator identification arrangement in an alarm system

Publications (1)

Publication Number Publication Date
DE3569997D1 true DE3569997D1 (en) 1989-06-08

Family

ID=6245221

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8585111385T Expired DE3569997D1 (en) 1984-09-12 1985-09-09 Annunciator identification arrangement in an alarm system

Country Status (3)

Country Link
EP (1) EP0178451B1 (en)
AT (1) ATE42851T1 (en)
DE (1) DE3569997D1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1297008B (en) * 1967-01-11 1969-06-04 Siemens Ag Signaling system with detectors connected in parallel in a two-wire loop
DE2230934B1 (en) * 1972-06-23 1973-02-15 Preussag Ag, Feuerschutz, 2060 Bad Oldesloe Alarm device, preferably for fire alarms
DE2245928A1 (en) * 1972-09-19 1974-04-04 Preussag Ag Feuerschutz PROCEDURE AND EQUIPMENT FOR CENTRALIZED DETECTION OF TRIPPED DETECTORS
DE2533354C3 (en) * 1975-07-25 1979-08-30 Siemens Ag, 1000 Berlin Und 8000 Muenchen Device for transmitting control commands in a fire protection system
DE2533382C2 (en) * 1975-07-25 1980-07-03 Siemens Ag, 1000 Berlin Und 8000 Muenchen Method and device for the transmission of measured values in a fire alarm system
DE2533330C3 (en) * 1975-07-25 1981-08-13 Siemens AG, 1000 Berlin und 8000 München Method and device for the transmission of measured values in a fire alarm system
DE2935335C2 (en) * 1979-08-31 1985-08-08 Siemens AG, 1000 Berlin und 8000 München DC alarm system
DE3225081A1 (en) * 1982-07-05 1984-01-12 Siemens AG, 1000 Berlin und 8000 München METHOD AND DEVICE FOR AUTOMATICALLY INQUIRING THE DETECTOR MEASUREMENT VALUE AND DETECTOR DETECTION IN A DANGER DETECTING SYSTEM

Also Published As

Publication number Publication date
ATE42851T1 (en) 1989-05-15
EP0178451B1 (en) 1989-05-03
EP0178451A1 (en) 1986-04-23

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee