18
(10) COM2/3/4/5/6/7/8/9/10 (9-pin): Serial Port Header
Pin NO. RS232
*RS422
(optional)
*RS485
(optional)
Pin 1
DCD
TX-
DATA-
Pin 2
RXD
TX+
DATA+
Pin 3
TXD
RX+
NC
Pin 4
DTR
RX-
NC
Pin 5
GND
GND
GND
Pin 6
DSR
NC
NC
Pin 7
RTS
NC
NC
Pin 8
CTS
NC
NC
Pin 9
RI
NC
NC
*Notice: COM2 header can function as RS232/422/485 port header. In normal
settings COM2 functions as RS232 header. With compatible COM cable COM2 can
function as RS422 or RS 485 header. User also needs to go to BIOS to set
‘Transmission Mode Select’ for COM2
(refer to Page-24)
at first, before using
specialized cable to connect different pins of this port.
(11) SYSFAN1/CPUFAN/SYSFAN2 (4-pin): FAN Headers
Pin1
G
ND
+
12V
F
an
P
ow
er
Fan
S
peed
C
ont
rol
CPUFAN/SYSFAN1/SYSFAN2
