JPS5464499A - Detector wiring open detector for fire alarm detector - Google Patents
Detector wiring open detector for fire alarm detectorInfo
- 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
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
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)
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 |
-
1977
- 1977-10-31 JP JP52131277A patent/JPS6059637B2/en not_active Expired
Cited By (1)
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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