RS-232C Connectors

DB9 Male Connctor (Host측)

Pin# I/O 약 자 의 미 1 I DCD Data Carrier Detect 2 I RxD Received Data 3 O TxD Transmitted Data 4 O DTR Data Terminal Ready 5 - GND Ground

Pin# I/O 약 자 의 미 6 I DSR Data Set Ready 7 O RTS Request to Send 8 I CTS Clear to Send 9 O DSRS Data Signal Rate Selector

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DB25 Male Connector (Host측)

Pin# I/O 약 자 의 미 1 - F.G Frame Ground 2 O TxD Transmitted Data 3 I RxD Received Data 4 O RTS Request to Send 5 I CTS Clear to Send 6 I DSR Data Set Ready 7 - GND Ground 8 I DCD Data Carrier Detect 9 O TTY TxD+ TTY Transmitted Data+ 10 - - - 11 O TTY TxD- TTY Transmitted Data- 12 - - - 13 - - -

Pin# I/O 약 자 의 미 14 - - - 15 - - - 16 - - - 17 - - - 18 I TTY RxD+ TTY Received Data+ 19 - - - 20 O DTR Data Terminal Ready 21 - - - 22 I RI Ring Indicator 23 O DSRS Data Signal Rate Selector 24 - - - 25 I TTY RxD- TTY Received Data-

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