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Chapter 2 Hardware Installation
Chapter 2
COM (Serial) Ports
COM 1 and COM 2 can be selected among RS232, 422 and 485. COM 3 and COM 4 are fixed
at RS232. Configure COM 1 and COM 2 serial communication mode in the BIOS (the “SIO NU-
TOTON6106D” submenu of the Advanced menu). The serial ports are asynchronous commu-
nication ports with 16C550A-compatible UARTs that can be used with modems, serial printers,
remote display terminals, and other serial devices.
Connecting External Serial Ports
The COM ports may be 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 “Super IO Configuration” (SIO NUVOTON6106D) sub-
menu of the Advanced menu in the BIOS. Refer to Chapter 3 for more information.
2
1
19
COM 1/COM 2:
RS232/422/485
COM 3/COM 4:
RS232
Front Panel Connector
HDD-LED - HDD LED
This LED will be lit when the hard drive is being accessed.
RESET-SW - Reset Switch
This switch allows you to reboot without having to power off the system.
PWR-BTN - Power Switch
This switch is used to power on or off the system.
PWR-LED - Power/Standby LED
When the system’s power is on, this LED will be lit. When the system is in the S1 (POS - Pow-
er On Suspend) state, it will blink every second. When the system is in the S3 (STR - Suspend
To RAM) state, it will blink every 4 seconds.
Front
Panel
COM 1 COM 2
COM 3 COM 4
20
COM Port Connector
Pins
Function
1
DCD_1
2
DSR_1
3
RD_1
4
RTS_1
5
TD_1
6
CTS_1
7
DTR_1
8
RI_1
9
GND
10
GND
Pins
Function
11
DCD_2
12
DSR_2
13
RD_2
14
RTS_2
15
TD_2
16
CTS_2
17
DTR_2
18
RI_2
19
GND
20
GND
Pin Pin Assignment
Pin Pin Assignment
HDD-LED
6
HDD Power
PWR Button
1
Power Button
4
SUS_LED
3
Ground
RESET-SW
3
Ground
PWR LED
2
LED Power
5
RST Signal
4
SUS_LED
HDD_LED
Power_LED
Reset Button
Power Button
1
2
5
6
