12
COM1 (9-pin Block): RS232/422/485 Port
COM1: RS232/422/485 Serial Port; The pin assignment for RS-232/ 422/ 485 is listed
as follows:
1 2 3 4 5
Pin1
Pin1
Pin1
6 7 8 9
RS422 Mode
RS485 Mode
RS232 Mode
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 at
first, before using specialized cable to connect different pins of this port.
2-2-2 Motherboard Internal Connectors
(1) ATXPWR (24-pin block): Main Power Connector
ATX Power Supply connector: This is a new defined 24-pins connector that usually
comes with ATX case. The ATX Power Supply allows using soft power on momentary
switch that connect from the front panel switch to 2-pins Power On jumper pole on the
motherboard. When the power switch on the back of the ATX power supply turned on,
the full power will not come into the system board until the front panel switch is
momentarily pressed. Press this switch again will turn off the power to the system
board.
** We recommend that you use an ATX 12V Specification 2.0-compliant power
supply unit (PSU) with a minimum of 350W power rating. This type has 24-pin and 4-
pin power plugs.
** If you intend to use a PSU with 20-pin and 4-pin power plugs, make sure that the
20-pin power plug can provide at least 15A on +12V and the power supply unit has a
minimum power rating of 350W. The system may become unstable or may not boot
up if the power is inadequate.
** If you are using a 20-pin power plug, please refer to Figure1 for power supply
connection. Power plug form power supply and power connectors from motherboard
both adopt key design to avoid mistake installation. You can insert the power plug into
the connector with ease only in the right direction. If the direction is wrong it is hard to
fit in and if you make the connection by force if is possible.
GN
D
RS
485 D
+(A
)
RS
485 D
-(B)
GN
D
RS
422
RX
(B)
RS
422
RX
(A)
RS
422
T
X(A
)
RS
422
TX
(B
)
GND
RS
232
DT
R#
RS
232
S
OUT
RS
232
SI
N
RS
23
2 D
CD#
RS
232
R
I#
RS
232
CT
S#
RS
232
RT
S#
RS
232
DS
R#
