I/O BOARD CIRCUITS USING RS232 PORT

The present invention relates to an input and output board circuit using an RS232 port. The input and output board circuit according to the present invention comprises: a D-sub connector to be connected to an RS 232 port; a plurality of control terminals to be connected to an external device for con...

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Bibliographic Details
Main Authors LEE, WON MO, CHOI, WEON SEOK
Format Patent
LanguageEnglish
Korean
Published 08.10.2015
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Summary:The present invention relates to an input and output board circuit using an RS232 port. The input and output board circuit according to the present invention comprises: a D-sub connector to be connected to an RS 232 port; a plurality of control terminals to be connected to an external device for controlling contact points; a first photo coupler having an input terminal electrically connected with a No. 4 data terminal ready (DTR) terminal of the D-sub connector, and an output terminal electrically connected with a first output terminal of the control terminals; a second photo coupler having an input terminal electrically connected with a No. 7 request to send (RTS) terminal of the D-sub connector, and an output terminal electrically connected with a second output terminal of the control terminals; a third photo coupler having an output terminal electrically connected with a No. 6 data set ready (DSR) terminal of the D-sub connector, and an input terminal electrically connected with the first input terminal of the control terminals; and a fourth photo coupler having an output terminal electrically connected with a No. 8 clear to send (CTS) terminal of the D-sub connector, and an input terminal electrically connected with a second input terminal of the control terminals. 본 발명은 RS232 포트를 이용한 입출력 보드회로에 관한 것으로, 본 발명에 따른 상기 입출력보드회로는, RS232 포트에 접속되기 위한 D-sub 커넥터와; 접점제어용 외부장치에 접속되기 위한 복수의 제어단자들과; 입력단자는 상기 D-sub 커넥터의 제4번 DTR(Data Terminal Ready) 단자와 전기적으로 연결되고, 출력단자는 상기 복수의 제어단자들 중 제1출력단자와 전기적으로 연결되는 제1포토커플러와; 입력단자는 상기 D-sub 커넥터의 제7번 RTS(Request To Send) 단자와 전기적으로 연결되고, 출력단자는 상기 복수의 제어단자들 중 제2출력단자와 전기적으로 연결되는 제2포토커플러와; 출력단자는 상기 D-sub 커넥터의 제6번 DSR(Data Set Ready) 단자와 전기적으로 연결되고, 입력단자는 상기 복수의 제어단자들 중 제1입력단자와 전기적으로 연결되는 제3포토커플러와; 출력단자는 상기 D-sub 커넥터의 제8번 CTS(Clear To Send) 단자와 전기적으로 연결되고, 입력단자는 상기 복수의 제어단자들 중 제2입력단자와 전기적으로 연결되는 제4포토커플러를 구비할 수 있다.
Bibliography:Application Number: KR20140037072