NO794142L - INSTALLATION FOR HAZARD ALERT. - Google Patents

INSTALLATION FOR HAZARD ALERT.

Info

Publication number
NO794142L
NO794142L NO794142A NO794142A NO794142L NO 794142 L NO794142 L NO 794142L NO 794142 A NO794142 A NO 794142A NO 794142 A NO794142 A NO 794142A NO 794142 L NO794142 L NO 794142L
Authority
NO
Norway
Prior art keywords
intermediate station
alarm
transmission line
central control
line
Prior art date
Application number
NO794142A
Other languages
Norwegian (no)
Other versions
NO146518B (en
NO146518C (en
Inventor
Karlheinz Schreyer
Josef Voringer
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
Publication of NO794142L publication Critical patent/NO794142L/en
Publication of NO146518B publication Critical patent/NO146518B/en
Publication of NO146518C publication Critical patent/NO146518C/en

Links

Classifications

    • 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
    • G08B26/006—Alarm systems in which substations are interrogated in succession by a central station with substations connected to an individual line, e.g. star configuration

Abstract

1. Hazard warning system comprising a frequency measuring device (FM) which is arranged in a central control (Z), and comprising a plurality of alarms (M1...M16) which for power supply can each be connected to a direct voltage by means of a two-wire alarm line (ML1...ML16) and which furthermore contain a circuit arrangement (LM , CM , TM ) in order to produce a frequency characterized the message state of the alarm line on the particular alarm line, wherein in a plurality of alarm lines can be respectively led to an intermediate station (Z5) in which by means of a t.d.m. device (ZM), all connected alarm lines can be serially connected to a single two-wire transmission line (UL) which connects this intermediate station to the central control, characterized in that in the intermediate station (ZS), a current supply circuit (SV) for the t.d.m. device (ZM) is connected to the two wires (a, b) of the transmission line (UL) in parallel with the t.d.m. device (ZM) by means of a respective choke (La, Lb), that the current supply circuit (SV) has both a parallel connection for a direct voltage source (B) which is to be arranged in the intermediate station (ZS) and a device for voltage stabilization (DZ), and that there are provided switches (s1, s2) which depending upon switching position respectively establish between the transmission line (UL) and the intermediate station (ZS) a.d.c. connection or a capacitive connection (Ca , Cb ) in order to effect d.c. blocking in the transmission line (UL) of the intermediate station (ZS) from the central control (Z).
NO794142A 1979-01-29 1979-12-18 INSTALLATION FOR HAZARD ALERT. NO146518C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2903266A DE2903266C2 (en) 1979-01-29 1979-01-29 Alarm system

Publications (3)

Publication Number Publication Date
NO794142L true NO794142L (en) 1980-07-30
NO146518B NO146518B (en) 1982-07-05
NO146518C NO146518C (en) 1982-10-13

Family

ID=6061613

Family Applications (1)

Application Number Title Priority Date Filing Date
NO794142A NO146518C (en) 1979-01-29 1979-12-18 INSTALLATION FOR HAZARD ALERT.

Country Status (5)

Country Link
EP (1) EP0014329B1 (en)
AT (1) ATE805T1 (en)
DE (1) DE2903266C2 (en)
DK (1) DK149354C (en)
NO (1) NO146518C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3336290A1 (en) * 1982-10-08 1984-06-07 Joh. Vaillant Gmbh U. Co, 5630 Remscheid Method for the teletransmission of data of a heating or cooling system
US4922183A (en) * 1988-06-03 1990-05-01 Raychem Corporation Methods, systems and apparatus for detecting changes in variables
NO20032192D0 (en) * 2003-05-14 2003-05-14 Jens Marius Johnsen Floor Advertising

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2202110B2 (en) * 1972-01-18 1974-03-21 Gerhard Dr.-Ing. 8000 Muenchen Gruenberger Device for monitoring a number of reporting points
DE2341087C3 (en) * 1973-08-14 1979-09-27 Siemens Ag, 1000 Berlin Und 8000 Muenchen Automatic fire alarm 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
DE2641489C2 (en) * 1976-09-15 1984-05-30 Siemens AG, 1000 Berlin und 8000 München Method for the transmission of measured values in a fire alarm system

Also Published As

Publication number Publication date
DE2903266A1 (en) 1980-08-07
EP0014329B1 (en) 1982-03-31
DK149354B (en) 1986-05-12
DE2903266C2 (en) 1985-08-08
EP0014329A1 (en) 1980-08-20
NO146518B (en) 1982-07-05
NO146518C (en) 1982-10-13
DK149354C (en) 1986-11-03
ATE805T1 (en) 1982-04-15
DK35180A (en) 1980-07-30

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