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24) COMA_PW/COMB_PW/COMC_PW/COMD_PW (Serial Port Header Power Select
Jumpers)
The power select jumpers are used to select serial port power.
1-2 Close: Set to 12V.
2-3 Close: Set to 5V. (Default setting)
1
1
23) COMC/COMD (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
1
NDCD-
2
NDSR-
3
NSIN
4
NRTS-
5
NSOUT
6
NCTS-
7
NDTR-
8
+5V/+12V
9
GND
10
NC
For RS232 Devices:
Pin No.
Definition
1
TX(B)
2
NC
3
TX(A)
4
NC
5
RX(A)
6
NC
7
RX(B)
8
+5V/+12V
9
GND
10
NC
For RS422 Devices:
Pin No.
Definition
1
D-
2
NC
3
D+
4
NC
5
NC
6
NC
7
NC
8
+5V/+12V
9
GND
10
NC
For RS485 Devices:
1
2
9
10
25) CI (Chassis Intrusion Header)
This motherboard provides a chassis detection feature that detects if the chassis cover has been removed.
This function requires a chassis with chassis intrusion detection design.
Pin No.
Definition
1
Signal
2
GND
1
