Pin
Pin
Port 1
Port 2
9
10
11
12
13
14
15
16
17
18
19
20
Pin
Pin
Port 1
Port 2
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Note: COM 2 RS-232/422/485 can be set by BIOS setting. Default is RS-232.
Note: Pin 17 RI only, Pin 18 function can be select by JP4.
Chapter 2 – Hardware Information
RS-485
Pin Name
GND
NC
NC
NC
RI/+5V/+12V (0.5A) PWR
NC
RS-422
Pin Name
RS422_TX-
RS422_TX+
RS422_RX+
RS422_RX-
GND
NC
NC
NC
RI/+5V/+12V (0.5A) PWR
NC
Signal Type
GND
-
-
-
-
Signal Type
OUT
OUT
IN
IN
GND
-
-
-
-
Signal Level
-
-
-
-
+5V/+12V
-
Signal Level
±5V
±5V
-
-
-
-
-
-
+5V/+12V
-
20