Title:
【発明の名称】警報装置の中継器
Document Type and Number:
Japanese Patent JPH0664674
Kind Code:
B2
Abstract:
A signal transmitting junction unit for a hazard alarm system includes a signal transmission control unit, a zone line circuit connected to an electric source and having at least one hazard sensor connected thereto and an analog digital convertor; and the zone line circuit outputs the source voltage when a sensor connected to the zone line detects a hazard, outputs a voltage between the source voltage and the zero voltage when the sensor is under the normal monitoring standby condition, and outputs no voltage when the sensor is out of order upon calling from the central control unit and the voltage is digitized by the analog-digital converter and sent back to the central control unit through the transmission control unit.
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Inventors:
Koji Ouchi
Application Number:
JP19174284A
Publication Date:
August 22, 1994
Filing Date:
September 14, 1984
Export Citation:
Assignee:
Nitsutan Co., Ltd.
International Classes:
G08B26/00; G08B29/00; G08B25/00; G08B29/06; (IPC1-7): G08B29/06
Domestic Patent References:
| JP5376797A | ||||
| JP5977596A | ||||
| JP5723316B2 | ||||
| JP5738777B2 |
Next Patent: 警報装置