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User's Manual |KS-SD
Chapter 4
COM3/COM4 RS232/422/485 Select
These jumpers allow you to configure the serial COM ports to RS232, RS422 (full duplex) or
RS485. JP8, JP9 and JP15 are used to configure serial COM port 3. JP4, JP10 and JP16 are
used to configure serial COM port 4.
The pin functions of COM port 3 and COM port 4 will vary according to these jumpers’ set-
tings. You can also configure the RS485 auto flow mechanism through the BIOS setup utility.
For more information, refer to Chapter 7.
JP9 (for COM3) / JP4 (for COM4)
JP8 and JP15 (for COM3) / JP10 and JP16 (for COM4)
1-3, 2-4 On:
RS232 (default)
5
3
1
6
4
2
1-2 On: RS232
(default)
3-4 On: RS422
Full Duplex
2
4
6
1
3
5
5-6 On: RS485
1
3
5
2
4
6
1
3
5
2
4
6
JP9
JP4
6
4
2
5
3
1
6
4
2
5
3
1
6
4
2
5
3
1
3-5, 4-6 On:
RS422 Full Duplex/RS485
6
4
2
5
3
1
JP10
JP8, JP15, JP16
6
4
2
5
3
1
6
4
2
5
3
1
RS485
COM3 / COM4
RS422
Full Duplex
RS232
2
1
9
RXD
DCD TXD
DT
R
GND
DSR
RT
S
CTS
RI
2
1
9
RXD-
RXD+ TXD+
TXD-
NC.
NC.
NC.
NC.
NC.
2
1
9
D
ATA
-
D
ATA
+
TXD
NC.
NC.
NC.
NC.
NC.
NC.
COM3 / COM4
RS485
RS422
Full Duplex
RS232
N.C. N.C. N.C. N.C.
6 7 8 9
D
ATA
+
D
ATA
-
1 2 3 4 5
N.C.
N.C.
N.C.
RXD+
TXD+
RXD-
TXD- N.C.
1 2 3 4 5
6 7 8 9
N.C. N.C. N.C. N.C.
Buzzer
USB 3-4
USB 3.0
USB 1-2
USB 3.0
Power LED
HDD LED
J22
JP2
JP3
J21
HDMI (default)/DP
DVI
System
Fan 2
1
Front
Panel
5
1
1
1
1
1
4
SATA Power
-
DC-in
LAN 2
LAN 1
PCIe x16 (PCIE1)
SPI Flash
BIOS
9
1
2
10
COM 4
VGA
1
6
(JP4)
Clear CMOS
Data (JP1)
Auto Power-on
Select (JP11)
1
6
(JP9) (JP16)
1
6
6
1
(JP8) (JP15)
1
6
6
1
(JP10)
1
2
10
COM 3
1
(JP6)
6
6
9
1
2
10
COM 2
9
1
2
(JP7) (JP14)
6
6
1
2
1
2
10
COM 1
9
1
2
16
LPC
1
2
14
4-pin DC-out
1
1
2
3
4
PCIe x4 (PCIE2)
Power Button
Reset
DDR4_2 SODIMM
DDR4_1 SODIMM
1
(JP5)
6
6
1
1
1
6
6
2
2
2
6
1
4
STB_LED
2
25
26
Parallel
1
DIO Power
DIO
S/PDIF
Front Audio
2
5
1
1
10
9
ECX
+
SATA 3.0
(JP13)
1
1
(JP12)
1
SATA 0
SATA 1
1
Mini PCIe
mSATA
System
Fan 1
1
1
bettery
1
1
1
2
12
USB 2.0
9
COM 2
COM 1
JP8, JP15
6
4
2
5
3
1
JP4, JP10
6
4
2
5
3
1
6
4
2
5
3
1
JP9
JP16
DCD
TXD
RXD
DT
R
GND
RT
S
RI
DSR
CTS
1 2 3 4 5
6 7 8 9
Note:
When COM3 RS232/422/485 is selected, JP8 and JP15 must be set in accordance to
JP9. And when COM4 RS232/422/485 is selected, JP10 and JP16 must be set in ac-
cordance to JP4.
2
1
9
COM3/COM4:
RS232/422/485
COM3/COM4:
RS232/422/485
or
