JPS5963737U

JPS5963737U - input circuit

Info

Publication number: JPS5963737U
Application number: JP15882782U
Authority: JP
Inventors: 耕一藤井
Original assignee: オムロン株式会社
Priority date: 1982-10-19
Filing date: 1982-10-19
Publication date: 1984-04-26

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

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示す電子回路のブロック
図、第２図は同電子回路の入力回路３に外部電源を用い
た場合を示す接続状態図、第３図は同人力回路３に内部
電源を用いた場合を示す接続状態図である。１・・・内部回路、２・・・内部電源、３・・・入力回
路、４・・・外部電源、Ｓ・・・切換スイッチ、Ｐ１〜
Ｐ４・・・フォトカプラ、Ｄ１〜Ｄ４・・・発光素子、
Ｔ１〜Ｔ４・・・受光素子、０１〜Ｃ８・・・入力接点
。Fig. 1 is a block diagram of an electronic circuit showing an embodiment of this invention, Fig. 2 is a connection state diagram showing a case where an external power supply is used for the input circuit 3 of the electronic circuit, and Fig. 3 is a circuit diagram of the electronic circuit 3. FIG. 3 is a connection state diagram showing a case where an internal power source is used. 1...Internal circuit, 2...Internal power supply, 3...Input circuit, 4...External power supply, S...Selector switch, P1~
P4... Photo coupler, D1-D4... Light emitting element,
T1-T4... Light receiving element, 01-C8... Input contact.

Claims

[Scope of utility model registration request]

An input equipped with a photocoupler in which the output terminal of the input switch section going from the external power supply and input contact is connected to the common terminal and input terminal of the light emitting element, and the light receiving element is connected to the input part of the electronic circuit including the internal power supply. The circuit is characterized in that it has a changeover switch that is provided between one electrode of the light emitting element and the common terminal to switch current supply to the light emitting element from the internal power source and the external power source. input circuit.