Asus AAEON AHP-1154, User Manual

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Chapter 2 – Hardware Information 6
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2.1 COM Port Definition
COM1/4 (D-SUB 9)
Pin Pin Name Signal Type Signal Level
1 DCD IN
2 RX IN
3 TX OUT ±9V
4 DTR OUT ±9V
5 GND GND
6 DSR IN
7 RTS OUT ±9V
8 CTS IN
9 RI IN
COM2/3 (D-SUB9)
RS-232
Pin Pin Name Signal Type Signal Level
1 DCD IN
2 RX IN
3 TX OUT ±5V
4 DTR OUT ±5V
5 GND GND
6 DSR IN
7 RTS OUT ±5V
8 CTS IN
9 RI/ +5V/ +12V IN/ PWR +5V/ +12V