User Manual

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

1TX- DATA-

2N/A N/A

3TX+ DATA+

4N/A N/A

5RX+ N/A

6N/A N/A

7RX- N/A

8N/A N/A

9GND GND

10 Key Key

910