ADLINK MI-220 - Manual (Page 29)

Connectors & Jumpers 17
MI-220
Serial Port Connectors - RS-232 (COM1~4)
Serial Port Connector - RS-422/485/485+ (COM1)
To set COM1 to RS-422/485/485+, go the following BIOS setup
screen: Advanced > Super IO Configuration > Serial Port 1 Con-
figuration > Device mode.
Pin # Signal Function
1 DCD Data Carrier Detect
2 DSR Data Set Ready
3 RXD Receive Data
4 RTS Request to Send
5 TXD Transmit Data
6 CTS Clear to Send
7 DTR Data Terminal Ready
8 RI Ring Indicate
9 GND Ground
10 NC Key
Pin # RS-422/485+ RS-485
1 TX- DATA-
2 N/A N/A
3 TX+ DATA+
4 N/A N/A
5 RX+ N/A
6 N/A N/A
7 RX- N/A
8 N/A N/A
9 GND GND
10 Key Key
1 2
9 10
1 2
9 10