Com Port 4 (D-Sub 9) (Cn7); Com Port 3 (D-Sub 9) (Cn9) - Asus AAEON BIO-ST02-C4M1 User Manual

Pin Pin Name
1 +5VSB
2 USB_D-
3 USB_D+
4 GND

2.3.6 COM Port 4 (D-SUB 9) (CN7)

Pin Pin Name
1 DCD
2 RX
3 TX
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI

2.3.7 COM Port 3 (D-SUB 9) (CN9)

Chapter 2 – Hardware Information
Signal Type
PWR
DIFF
DIFF
GND
1 5
6 9
Signal Type
IN
IN
OUT
OUT
GND
IN
OUT
IN
IN
1 5
6 9
Signal level
+5V
Signal level
± 9V
± 9V
± 9V
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