JPH0180726U

JPH0180726U -

Info

Publication number: JPH0180726U
Application number: JP1987176871U
Authority: JP
Priority date: 1987-11-19
Filing date: 1987-11-19
Publication date: 1989-05-30

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の自動及び手動モー
ド付のスイツチ制御回路を示す回路図、第２図は
従来の自動及び手動モード付のスイツチ制御回路
を示す回路図である。１，１５……自動制御回路、２ａ，２ｂ……出
力端子、３，２０……アラーム信号入力端子群、
４，５……機械式スイツチ、６……有接点のリレ
ー、８ａ，８ｂ……トランジスタ、９ａ，９ｂ…
…抵抗、１０……２連３ポジシヨンスイツチ、１
１ａ，１１ｂ……出力線、１２，１３……スイツ
チ、１６ａ，１６ｂ，１７ａ，１７ｂ……固定接
点、１８，１９……可動接点。 FIG. 1 is a circuit diagram showing a switch control circuit with automatic and manual modes according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional switch control circuit with automatic and manual modes. 1, 15... automatic control circuit, 2a, 2b... output terminal, 3, 20... alarm signal input terminal group,
4, 5...Mechanical switch, 6...Contact relay, 8a, 8b...Transistor, 9a, 9b...
...Resistance, 10...2 series 3 position switch, 1
1a, 11b...Output line, 12, 13...Switch, 16a, 16b, 17a, 17b...Fixed contact, 18, 19...Movable contact.

Claims

[Scope of utility model registration request]

In a switch control circuit that controls opening and closing of a switch that opens or closes in response to a first or second potential applied to an input terminal, a switch is inserted between the input terminal of the first switch and the first potential. The first
a second resistor inserted between the input terminal of the second switch and the first potential;
- A double three-position switch consisting of a fourth fixed contact and first and second movable contacts, and a first switch inserted between the input end of the first switch and the second potential. A second switch circuit inserted between the input terminal of the second switch and the second potential, and the first and second switch circuits are made conductive or non-conductive depending on input conditions. the first and second fixed contacts are respectively connected to input terminals of the first and second switches, and the first and second movable contacts are are respectively connected to a second potential and a third potential, the first movable contact is in contact with the first or second fixed contact except when it is at the neutral point, and the second movable contact is connected to the first or second fixed contact. is in contact with the third or fourth fixed contact except when it is at the neutral point, and the automatic control circuit is configured to control the second movable contact when the second movable contact is in contact with the third fixed contact. A switch control circuit characterized in that the switch circuit is made non-conductive, and the first switch circuit is made non-conductive when the second movable contact is in contact with the fourth fixed contact.