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