JPS60164297U

JPS60164297U - Fire alarm system malfunction prevention device

Info

Publication number: JPS60164297U
Application number: JP5015384U
Authority: JP
Inventors: 正樹野林; 茂松本
Original assignee: 松下電工株式会社
Priority date: 1984-04-05
Filing date: 1984-04-05
Publication date: 1985-10-31
Also published as: JPH0319033Y2

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来例の回路図、第２図は本考案の一実施例の
回路図であり、１ａは煙感知器、１ｂは熱感知器、２は
発信機、４は回線電圧検知回路部、５はスイッチング回
路部、６は高感度リレー、７は第１のタイマ回路部、８
は第２のタイマ回路部、９は誤動作防止回路、ｒｏはリ
レー接点、Ｒ３’１は受信リレー、１■□〜Ｉｎは感知
器接続線、Ｉｃは共通線、ＳＷｏ”−３Ｗｎは切り替え
スイッチＳＷである。FIG. 1 is a circuit diagram of a conventional example, and FIG. 2 is a circuit diagram of an embodiment of the present invention, where 1a is a smoke detector, 1b is a heat sensor, 2 is a transmitter, and 4 is a line voltage detection circuit. , 5 is a switching circuit section, 6 is a high-sensitivity relay, 7 is a first timer circuit section, 8
is the second timer circuit, 9 is the malfunction prevention circuit, ro is the relay contact, R3'1 is the reception relay, 1■□~In is the sensor connection line, Ic is the common line, SWo"-3Wn is the changeover switch SW It is.

Claims

[Scope of utility model registration request]

(1) A DC voltage is applied between the common line and the sensor connection line via the receiving relay in the receiver, and a transmitter is connected between the sensor connection line and the common line, and the sensor and smoke detector are connected between the common line and the sensor connection line. connect in parallel,
In a fire system in which an exciting current is sent to a receiving relay through a heat detector or smoke detector when it is turned on, the voltage applied between the common line and the sensor connection line and the line current are A line state detection means that generates an output when the level changes to a predetermined level; a switching circuit section that uses the detection output of the line state detection means to drive a switching means whose operation time is faster than that of the receiving relay; and when the switching circuit section starts operating. a first timer circuit section that starts a time-limited operation from and sets the switching circuit section in an on-operable state until a time-up period; and a second timer circuit section that sets the switching circuit section to an OFF state until the switching circuit section has passed. 1. A malfunction prevention device for a fire alarm system, comprising a malfunction prevention circuit configured to open at least a starting end portion of the malfunction prevention circuit, and a switching means for switching the malfunction prevention circuit between non-operational and operable states.

(2) The malfunction prevention device for a fire alarm system according to claim 1, wherein the switching means is provided for each sensor connection line.

(3) A malfunction prevention device for a fire alarm system according to claim 1, characterized in that the switching means is configured to switch all sensor connection lines at once.