JPS5464499A - Detector wiring open detector for fire alarm detector - Google Patents

Detector wiring open detector for fire alarm detector

Info

Publication number
JPS5464499A
JPS5464499A JP13127777A JP13127777A JPS5464499A JP S5464499 A JPS5464499 A JP S5464499A JP 13127777 A JP13127777 A JP 13127777A JP 13127777 A JP13127777 A JP 13127777A JP S5464499 A JPS5464499 A JP S5464499A
Authority
JP
Japan
Prior art keywords
detector
line
detecting
voltage
power supply
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
JP13127777A
Other languages
Japanese (ja)
Other versions
JPS6059637B2 (en
Inventor
Tsutomu Kondo
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 Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP52131277A priority Critical patent/JPS6059637B2/en
Publication of JPS5464499A publication Critical patent/JPS5464499A/en
Publication of JPS6059637B2 publication Critical patent/JPS6059637B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Emergency Protection Circuit Devices (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)

Abstract

PURPOSE: To make easy the setting of operating voltage and to enable sure information, by performing open wire detection according to the line to line voltage at the start point of the detecting wire.
CONSTITUTION: Diodes 8, 9 connecting the anode via the relay coils 4, 5 to the positive polarity of the DC power supply 1, detecting wires 6a and 7a connecting the start point to the diode cathode, Zener elements 13, 14 connected at the detecting wires 6b and 7b connecting the start point toa the negative polarity of the power supply 1, power supply 15 connected to the start point of the detector wiring via resistors 16 and 17 so that the line to line voltage of the detector wiring can continually greater than the voltage of the power supply 1, and the circuit 19 detecting the open wire by detecting the terminal voltage change for the resistors 16 and 17, are provided. Further, normally, each line to line voltage is equal to the elements 13 and 14, and if open wire is caused on wiring, the line to line voltage between the start points of wiring is increased, allowing to operate the circuit 19 and infrom the interruption.
COPYRIGHT: (C)1979,JPO&Japio
JP52131277A 1977-10-31 1977-10-31 Fire alarm sensor wiring disconnection detection device Expired JPS6059637B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52131277A JPS6059637B2 (en) 1977-10-31 1977-10-31 Fire alarm sensor wiring disconnection detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52131277A JPS6059637B2 (en) 1977-10-31 1977-10-31 Fire alarm sensor wiring disconnection detection device

Publications (2)

Publication Number Publication Date
JPS5464499A true JPS5464499A (en) 1979-05-24
JPS6059637B2 JPS6059637B2 (en) 1985-12-26

Family

ID=15054166

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52131277A Expired JPS6059637B2 (en) 1977-10-31 1977-10-31 Fire alarm sensor wiring disconnection detection device

Country Status (1)

Country Link
JP (1) JPS6059637B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014021041A (en) * 2012-07-23 2014-02-03 Ntt Data Intellilink Corp Current path disconnection detection circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014021041A (en) * 2012-07-23 2014-02-03 Ntt Data Intellilink Corp Current path disconnection detection circuit

Also Published As

Publication number Publication date
JPS6059637B2 (en) 1985-12-26

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