8) COMA/COMB (Serial Port Headers)
Each COM header can provide one serial port via an optional COM port cable. For purchasing the optional
COM port cable, please contact the local dealer.
Pin No.
Definition
Pin No.
Definition
1
NDCD-
6
NCTS-
2
NDSR-
7
NDTR-
3
NSIN
8
12V_5V
4
NRTS-
9
GND
5
NSOUT
10
NC
10
9
2
1
9) 2W_SPKR (Speaker Header)
This speaker header is connected to a L/R audio pins from the board to support the 3W (4ohm) stereo
speaker on your AIO chassis.
Pin No.
Definition
1
Speaker OUT R-
2
Speaker OUT R+
3
Speaker OUT L-
4
Speaker OUT L+
10) SPEAKER (Buzzer Header)
Connects to the buzzer on the chassis front panel. The system reports system startup status by issuing a
beep code. One single short beep will be heard if no problem is detected at system startup.
Pin No.
Definition
1
VCC
2
NC
3
NC
4
SPK-
DEBUG
PORT
G.QBOFM
1
1
4
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