Cooling Fan Connectors; Com (Serial) Ports - DFI DT122-BE User Manual

Cooling Fan Connectors

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System Fan
1
CPU Fan
The fan connectors are used to connect cooling fans. The cooling fans will provide adequate
airflow throughout the chassis to prevent overheating the CPU and system board components.
BIOS Setting
The Advanced menu ("PC Health Status" submenu) of the BIOS will display the current speed
of the cooling fans. Refer to the chapter 7 for more information.
Chapter 5 Ports and Connectors
Chapter 5
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COM (Serial) Ports

COM 4
2
COM 3
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COM 2
COM 2/COM 3/COM 4:
RS232
COM 1:
RS232/422/485
COM 2 to COM 4 are fixed at RS232.
The pin functions of COM port 1 will vary according to JP3's, JP4's and JP5's setting. They are
used to configure the Serial COM port 1 to pure RS232, RS422 Full Duplex or RS485. Refer to
"COM 1 RS232/422/485 Select" in this chapter for more information.
The serial ports are asynchronous communication ports with 16C550A-compatible UARTs that
can be used with modems, serial printers, remote display terminals, and other serial devices.
Connecting External Serial Ports
Your COM port may come mounted on a card-edge bracket. Install the card-edge bracket to
an available slot at the rear of the system chassis then insert the serial port cable to the COM
connector. Make sure the colored stripe on the ribbon cable is aligned with pin 1 of the COM
connector.
BIOS Setting
Configure the serial COM ports in the Advanced menu ("Super IO Configuration" submenu) of
the BIOS. Refer to the chapter 7 for more information.
Important:
When COM 1 RS232/422/485 is selected, JP4 and JP5 must be set in accordance to
JP3.
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