Serial Port 3/ 4 Connector (Cn19/Cn20); Digital I/O Connector (Cn20) - Asus AAEON VPC-5620S User Manual

2.4.3 RS-232 Serial Port 3/ 4 Connector (CN19/CN20)
Pin Signal
1 DCD (485-/422TX-)
3 TXD (422RX+)
5 GND
7 RTS
9 RI
2.4.4

Digital I/O Connector (CN20)

Pin
1
2
3
4
5
Chapter 2 – Hardware Information
Signal
GND
GPI Port 1
GPI Port 2
GPI Port 3
GPI Port 4
Pin Signal
2 RXD (485+/422TX+)
4 DTR (422RX-)
6 DSR
8 CTS
10
Pin Signal
6 +5V
7 GPO Port 5
8 GPO Port 6
9 GPO Port 7
10 GPO Port 8
20