JPS5483396A - Fire alarming system - Google Patents

Fire alarming system

Info

Publication number
JPS5483396A
JPS5483396A JP15126177A JP15126177A JPS5483396A JP S5483396 A JPS5483396 A JP S5483396A JP 15126177 A JP15126177 A JP 15126177A JP 15126177 A JP15126177 A JP 15126177A JP S5483396 A JPS5483396 A JP S5483396A
Authority
JP
Japan
Prior art keywords
address
detectors
alarming system
polling
repeaters
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.)
Granted
Application number
JP15126177A
Other languages
Japanese (ja)
Other versions
JPS5926986B2 (en
Inventor
Yasuhiko Arai
Koji Ukiana
Masahisa Furuya
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP15126177A priority Critical patent/JPS5926986B2/en
Publication of JPS5483396A publication Critical patent/JPS5483396A/en
Publication of JPS5926986B2 publication Critical patent/JPS5926986B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Alarm Systems (AREA)
  • Fire Alarms (AREA)

Abstract

PURPOSE: To realize a highly reliable fire alarming system by carrying out the decision for the circuit disconnection area as well as for the faulty detector bt the presence or absence of the address return after switching of the transmission route.
CONSTITUTION: Fire detectors SS11WSSnm contain the digital transmission control function with which the own address is returned to the address polling sent from repeaters R1WRn only when the address polling is in agreement with the own address, only the next address polling can be received when no agreement is obtained to wait and no answer can be given for the communication with other detectors and repeaters. In addition to such fire detectors, the following units form the fire alarming system: loop-type digital transmission circuits ll1Wlln which connect the repeater and detectors SS11WSSnm; and repeaters R1WRn which contain the switching function and the transmission control function to switch the both ends of the digital transmission circuit. Thus, in case no answer is given to the address polling, the transmission route is switched to repeat the address polling. And the decision is given to the circuit disconnection area as well as to the faulty detector by the presence or absence of the address return after switching of the transmission route. Thus, a highly reliable fire alarming system can be obtained.
COPYRIGHT: (C)1979,JPO&Japio
JP15126177A 1977-12-15 1977-12-15 fire notification system Expired JPS5926986B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15126177A JPS5926986B2 (en) 1977-12-15 1977-12-15 fire notification system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15126177A JPS5926986B2 (en) 1977-12-15 1977-12-15 fire notification system

Publications (2)

Publication Number Publication Date
JPS5483396A true JPS5483396A (en) 1979-07-03
JPS5926986B2 JPS5926986B2 (en) 1984-07-02

Family

ID=15514786

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15126177A Expired JPS5926986B2 (en) 1977-12-15 1977-12-15 fire notification system

Country Status (1)

Country Link
JP (1) JPS5926986B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965393A (en) * 1982-10-04 1984-04-13 三菱電機株式会社 Internal abnormality communicator for building
JPS5995698A (en) * 1982-11-25 1984-06-01 ニツタン株式会社 Abnormality alarm
JPS629499A (en) * 1985-07-05 1987-01-17 ニツタン株式会社 Alarm system
JPS6221347A (en) * 1985-07-19 1987-01-29 Hochiki Corp Fault supervisory equipment
JPS6429996A (en) * 1987-07-25 1989-01-31 Nittan Co Ltd Receiver for fire alarm
JPH02310699A (en) * 1989-05-25 1990-12-26 Matsushita Electric Works Ltd Disaster prevention system
JP2021103458A (en) * 2019-12-25 2021-07-15 ニッタン株式会社 Fire detection system and repeater

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5965393A (en) * 1982-10-04 1984-04-13 三菱電機株式会社 Internal abnormality communicator for building
JPS5995698A (en) * 1982-11-25 1984-06-01 ニツタン株式会社 Abnormality alarm
JPS629499A (en) * 1985-07-05 1987-01-17 ニツタン株式会社 Alarm system
JPS6221347A (en) * 1985-07-19 1987-01-29 Hochiki Corp Fault supervisory equipment
JPS6429996A (en) * 1987-07-25 1989-01-31 Nittan Co Ltd Receiver for fire alarm
JPH02310699A (en) * 1989-05-25 1990-12-26 Matsushita Electric Works Ltd Disaster prevention system
JP2021103458A (en) * 2019-12-25 2021-07-15 ニッタン株式会社 Fire detection system and repeater

Also Published As

Publication number Publication date
JPS5926986B2 (en) 1984-07-02

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