13
(2) COM1 (9-pin Block): RS232/422/485 Serial Port Connector
COM1 port can function as RS232/422/485 port. In normal settings COM1 functions
as RS232 port. With compatible COM cable COM1 can function as RS422 or RS 485
port.
User also needs to go to BIOS to set ‘Transmission Mode Select’ for COM1 (refer to
BIOS Setting) at first, before using specialized cable to connect different pins of this
port.
For RS422 Mode
RS422 TX(B)
RS422 TX(A)
RS422 RX(A)
RS422 RX(B)
For RS485 Mode
RS485 D-(B)
RS485 D+(A)
(3) ATXPWR (24-pin Block): ATX Power Header
Pin1-
ROW1
+
3.3V
ROW2
-1
2V
GND
Soft
P
ower
O
n
GND
GND
GND
-5V
+
5V
+
5V
+
5V
GND
P
ower OK
+
5V
S
tand By
+
12
V
+
12
V
+
3.3V
GND
+
5V
GND
+
5V
GND
+
3.3V
+
3.3V
ATX Power
Connector