JPS5851388U - Fault detection circuit for fire alarm district bell line - Google Patents

Fault detection circuit for fire alarm district bell line

Info

Publication number
JPS5851388U
JPS5851388U JP14396681U JP14396681U JPS5851388U JP S5851388 U JPS5851388 U JP S5851388U JP 14396681 U JP14396681 U JP 14396681U JP 14396681 U JP14396681 U JP 14396681U JP S5851388 U JPS5851388 U JP S5851388U
Authority
JP
Japan
Prior art keywords
detection circuit
terminal
power source
fire alarm
series
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
JP14396681U
Other languages
Japanese (ja)
Other versions
JPS6339820Y2 (en
Inventor
浩司 大内
Original Assignee
ニツタン株式会社
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 ニツタン株式会社 filed Critical ニツタン株式会社
Priority to JP14396681U priority Critical patent/JPS5851388U/en
Publication of JPS5851388U publication Critical patent/JPS5851388U/en
Application granted granted Critical
Publication of JPS6339820Y2 publication Critical patent/JPS6339820Y2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【図面の簡単な説明】[Brief explanation of the drawing]

図は本考案の一実施例を示す回路図である。 図において、Ｒ１〜Ｒ１□・・・・・・抵抗、Ｒｏ・・
・・・・端末抵抗、Ｑ□〜Ｑ４・・・・・・トランジス
タ、Ｄ８・・・・・・ダイオード、Ｚ・・・・・・ツェ
ナーダイオード、Ｂ・・・・・・ベル。The figure is a circuit diagram showing an embodiment of the present invention. In the figure, R1 to R1□...Resistance, Ro...
...Terminal resistance, Q□~Q4...Transistor, D8...Diode, Z...Zener diode, B...Bell.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] （１）ダイオードを直列接続したベルと、前記ダイオー
ドと逆極性のダイオードを直列接続した端末抵抗とが接
続された１対の火災警報地区ベル線を接続する第１およ
び第２の端子と、該第１の端子と正電源との間に直列に
接続され火災信号によってオンする第１のスイッチと、
前記第２の端子と負電源との間に直列に接続され火災信
号によってオンする第２のスイッチと、前記第２の端子
と正電源との間に接続された抵抗と、前記第１の端子と
負電源との間に接続された監視電流検出回路と、前記第
１の端子と負電源との間に接続された電圧検出回路とを
備えたことを特徴とする火災警報地区ベル線の障害検出
回路。(1) first and second terminals for connecting a pair of fire alarm district bell wires each having a bell connected in series with a diode and a terminal resistor having a terminal resistor connected in series with a diode of opposite polarity to said diode; a first switch connected in series between the first terminal and the positive power source and turned on by a fire signal;
a second switch connected in series between the second terminal and the negative power source and turned on by a fire signal; a resistor connected between the second terminal and the positive power source; and the first terminal. and a monitoring current detection circuit connected between the first terminal and the negative power source, and a voltage detection circuit connected between the first terminal and the negative power source. detection circuit. （２）実用新案登録請求の範囲第１項記載の火災警報地
区ベル線の障害検出回路において、火災信−号入力時に
前記電圧検出回路の動作を禁止するように構成したこと
を特徴とするもの。(2) Utility Model Registration Scope The failure detection circuit for the fire alarm district bell line as set forth in claim 1 is characterized in that the voltage detection circuit is configured to prohibit operation when a fire signal is input. .
JP14396681U 1981-09-30 1981-09-30 Fault detection circuit for fire alarm district bell line Granted JPS5851388U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14396681U JPS5851388U (en) 1981-09-30 1981-09-30 Fault detection circuit for fire alarm district bell line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14396681U JPS5851388U (en) 1981-09-30 1981-09-30 Fault detection circuit for fire alarm district bell line

Publications (2)

Publication Number Publication Date
JPS5851388U true JPS5851388U (en) 1983-04-07
JPS6339820Y2 JPS6339820Y2 (en) 1988-10-19

Family

ID=29936931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14396681U Granted JPS5851388U (en) 1981-09-30 1981-09-30 Fault detection circuit for fire alarm district bell line

Country Status (1)

Country Link
JP (1) JPS5851388U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6237391U (en) * 1985-08-16 1987-03-05
JPH01174647U (en) * 1988-05-30 1989-12-12

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258396A (en) * 1975-11-10 1977-05-13 Nittan Co Ltd Device for monitoring disconnection of bell wire for fire alarm
JPS5422759U (en) * 1977-07-18 1979-02-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258396A (en) * 1975-11-10 1977-05-13 Nittan Co Ltd Device for monitoring disconnection of bell wire for fire alarm
JPS5422759U (en) * 1977-07-18 1979-02-14

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6237391U (en) * 1985-08-16 1987-03-05
JPH01174647U (en) * 1988-05-30 1989-12-12
JPH0534345Y2 (en) * 1988-05-30 1993-08-31

Also Published As

Publication number Publication date
JPS6339820Y2 (en) 1988-10-19

Similar Documents

Publication Publication Date Title
JPS5851388U (en) Fault detection circuit for fire alarm district bell line
JPS58183043U (en) display circuit
JPS6051737U (en) power supply
JPS6048392U (en) Motor drive circuit protection device
JPS5914426U (en) input circuit
JPS60181927U (en) Transistor switching circuit with protection function
JPS59126393U (en) Broken fuse detection circuit for alarm bell wire, etc.
JPS6013476U (en) Contact signal line disconnection detection circuit
JPS5847527U (en) Disconnection detection device for vehicle lamps
JPS5915195U (en) Gas leak alarm external output circuit
JPS58142795U (en) fire detector
JPS5826676U (en) Device with ground wire disconnection detection function
JPS5860893U (en) Protection device for induction heating equipment
JPS58103594U (en) Inverter device
JPS6119756U (en) Flammable gas detection device
JPS5819385U (en) alarm device
JPS5934444U (en) lightning protection circuit
JPH0340836U (en)
JPS6059148U (en) Gas detector initial malfunction prevention circuit
JPS59109232U (en) Electronic thermal circuit of D/C servo motor
JPS5826236U (en) timer circuit
JPS58150192U (en) Alarm power supply reverse connection prevention circuit
JPS59134891U (en) gas leak alarm
JPS60106136U (en) temperature detection device
JPS6032728U (en) Fault detection sensor