JPS5228298A - Supervisory alarm unit by loop circuit system - Google Patents
Supervisory alarm unit by loop circuit systemInfo
- Publication number
- JPS5228298A JPS5228298A JP10463275A JP10463275A JPS5228298A JP S5228298 A JPS5228298 A JP S5228298A JP 10463275 A JP10463275 A JP 10463275A JP 10463275 A JP10463275 A JP 10463275A JP S5228298 A JPS5228298 A JP S5228298A
- Authority
- JP
- Japan
- Prior art keywords
- loop circuit
- circuit system
- alarm unit
- supervisory alarm
- supervisory
- 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.)
- Pending
Links
Landscapes
- Alarm Systems (AREA)
- Selective Calling Equipment (AREA)
Abstract
PURPOSE: Early detection of the fault by bulding-in a multiplexer and an A/D converter in the terminal control box set in the supervisory section to convert the analog signal from the sensors divided into several gorups into the digital signal to input to the loop circuit.
COPYRIGHT: (C)1977,JPO&Japio
Priority Applications (10)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10463275A JPS5228298A (en) | 1975-08-28 | 1975-08-28 | Supervisory alarm unit by loop circuit system |
GB3520576A GB1556061A (en) | 1975-08-28 | 1976-08-24 | Monitor and alarm apparatus in loop line system |
GB1927177A GB1556062A (en) | 1975-08-28 | 1976-08-24 | Centralised monitoring system for gas leakage |
CA259,928A CA1083242A (en) | 1975-08-28 | 1976-08-26 | Monitor and alarm apparatus in loop line system |
DE19762638529 DE2638529A1 (en) | 1975-08-28 | 1976-08-26 | MONITORING AND ALARM METHODS AND DEVICE FOR ACCIDENT PREVENTION |
BR7605636A BR7605636A (en) | 1975-08-28 | 1976-08-26 | PROCESS FOR MONITORING AND GIVING ALARM OF A DISASTER IN A CENTRALIZED MONITOR AREA AND SYSTEM AND PROCESS FOR DETERMINING GAS EXHAUST |
FR7626025A FR2322411A1 (en) | 1975-08-28 | 1976-08-27 | CONTROL AND ALARM DEVICE IN A LOOP LINE INSTALLATION |
NL7609588A NL7609588A (en) | 1975-08-28 | 1976-08-27 | MONITORING AND ALARM DEVICE IN A RING-LINE SYSTEM. |
MX486476U MX3957E (en) | 1975-08-28 | 1976-08-27 | IMPROVEMENTS IN ALARM SYSTEM AND MONITORING IN A LOOP CIRCUIT FOR GAS LEAKAGE |
IT5107176A IT1066426B (en) | 1975-08-28 | 1976-08-27 | APPARATUS AND PROCEDURE FOR DISCOVERY AND SIGNALING OF DISASTERS |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10463275A JPS5228298A (en) | 1975-08-28 | 1975-08-28 | Supervisory alarm unit by loop circuit system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5228298A true JPS5228298A (en) | 1977-03-03 |
Family
ID=14385810
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10463275A Pending JPS5228298A (en) | 1975-08-28 | 1975-08-28 | Supervisory alarm unit by loop circuit system |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS5228298A (en) |
CA (1) | CA1083242A (en) |
MX (1) | MX3957E (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58144299A (en) * | 1982-02-22 | 1983-08-27 | 日本電気株式会社 | Security terminal |
JPS61264835A (en) * | 1985-05-17 | 1986-11-22 | Kawamura Denki Sangyo Kk | Optical fiber data link system |
-
1975
- 1975-08-28 JP JP10463275A patent/JPS5228298A/en active Pending
-
1976
- 1976-08-26 CA CA259,928A patent/CA1083242A/en not_active Expired
- 1976-08-27 MX MX486476U patent/MX3957E/en unknown
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58144299A (en) * | 1982-02-22 | 1983-08-27 | 日本電気株式会社 | Security terminal |
JPS61264835A (en) * | 1985-05-17 | 1986-11-22 | Kawamura Denki Sangyo Kk | Optical fiber data link system |
Also Published As
Publication number | Publication date |
---|---|
MX3957E (en) | 1981-10-15 |
CA1083242A (en) | 1980-08-05 |
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