23
COM3 & COM4 Power Setting
COM3 and COM4 can be set to provide power to your serial device.
The voltage can be set to +5V or 12V by setting jumper JP18 on the mother-
board. When enabled, the power is available on pin 10 of the RJ45 serial con-
nector. If you use the serial RJ45 to DB9 adapter cable, the power is on pin 9 of
the DB9 connector. By default, the power option is disabled in the BIOS.
COM Power Setting
Function
JP9
▲COM3 5V
8
5 7
2
1 3
6
4
COM3 12V
COM4 5V
8
5 7
2
1 3
6
4
▲COM4 12V
Please see the following page for jumper JP9 location
8
5 7
2
1
3
6
4
8
5
7
2
1 3
6
4
BIOS/Utility setup
Power on the system, and press
1.
the <DEL> key when the system
is booting up to enter the BIOS
Setup utility.
Select the Advanced tab.
2.
Select Power Configuration
3.
COM/VGA Ports and press
<Enter> to go to display the
available options.
4. To enable the power, select
COM3 Power Setting or COM4
Power setting and press
<Enter>. Select Power and press
<Enter>. Save the change by
pressing F10.
2
1
open
2
1
short
▲ = Manufacturer Default Setting
