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Pin
Pin Name
1
RS485_ D2-
2
NC
3
RS485_D2+
4
NC
5
NC
6
NC
7
NC
8
NC/+5V/+12V
9
GND
Pin
Pin Name
1
RS422_TX2-
2
NC
3
RS422_TX2+
4
NC
5
RS422_RX2+
6
NC
7
RS422_RX2-
8
NC/+5V/+12V
9
GND
Note: COM2 RS-232/422/485 can be set by BIOS setting. Default is RS-232.
Note: Pin 8 function can be changed by BOM.
Chapter 2 – Hardware Information
RS485
Signal Type
Signal Level
I/O
±5V
I/O
±5V
PWR
+5V/+12V
GND
RS422
Signal Type
Signal Level
OUT
±5V
OUT
±5V
IN
IN
PWR
+5V/+12V
GND
14
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