
18
Chapter 5 Ports and Connectors
Chapter 5
COM Ports
COM 1 and COM 3 can be selected among different communication modes whereas COM 2
can be used in RS232 mode only. COM 3 and COM 4/5 are pin headers and provide signals
that are different from typical RS232 communication.
• Serial Port
The serial port is an asynchronous communication ports that can be used with modems, serial
printers, remote display terminals, and other serial devices. And the ccTalk protocol of COM 3
can be used to connect peripherals used in automatic payment machines for a variety of market
sectors such as transportation, ticketing, gaming and entertainment, and retail.
COM 1 (RS232/RS422/RS485) / COM 2 (RS232)
DCD
TXD
RXD
DT
R
GND
12 3 4 5
6
8 9
7
DSR
CTS
RT
S
RI
RS232
RS485
RS422
Full Duplex
TX
-
RX+
TX+
RX
-
GND
1 2 34 5
N.C.
N.C.
N.C.
N.C.
6 8 9
7
D
ATA
-
N.C.
D
ATA
+
N.C. GND
1 2 3 4 5
N.C.
N.C.
N.C.
N.C.
6 8 9
7
• BIOS Setting
Configure the COM ports including its communication mode in the Advanced menu (“
Super IO
Configuration” submenu) of the BIOS. Refer to Chapter 7 for more information.
COM 3: RS232
(TX/RX/GND/ccTalk)
Pins
Pin Assignment
1
COM3 RS232-TX
2
COM3 RS232-RX
3
GND
4
+12V power out
5
ccTalk
6
GND
COM 4/5: RS232
(TX/RX/±12V/GND)
Pins
Pin Assignment
1
COM4 RS232-TX
2
COM4 RS232-RX
3
+12V power out
4
-12V power out
5
GND
6
COM5 RS232-TX
7
COM5 RS232-RX
8
+12V power out
9
-12V power out
10
GND
BAT 2
1
Clear COMS (JP1)
M.2 2280 (M Key)
SATA 3.0
SATA 1
1
AMD
GX-217GI
GX-224IJ
GX-220IJ
D
D
R4_2
SOD
IMM
D
D
R4_1
SOD
IMM
CPU Fan
1
BAT 3
BAT 1
USB 3.0_1
1
4
Intrusion
Door 8
1
FPGA Program (J12)
MCU Program (J15)
1
1
SATA 3.0
SATA 0
1
5
1
8
Intrusion
Door 1~6
4
S/PDIF
1
6
1
7
12
2
1
Speaker
1
DC_out
5V/2A
COM 2
1
5
6
COM 1
1
5
6
DO 17~32
4
DO 1~16
9
1
10
9
1
10
18
18
10
1
11
20
10
1
11
20
DI 17~32
DI 1~16
iButton Intrusion
Door7
1
3
4
1
2
LPC
LAN 1
LAN 2
DC_in
USB 2.0_4
1
4
USB 2.0_3
1
4
USB 2.0_2
1
4
USB 2.0_1
1
4
USB 3.0_2
1
4
DP 0
DP 1
5.1CH
L
or
1
2
3
4
1
COM 3
3
6
4
5
10
COM 4/5
1
6
SPI
Flash
Power LED
HDD LED
Power Button
Reset Button
SRAM
USB 2.0_5
1
4
BAT 4
(J20)
1
®
SRAM
FPGA
Note: GX-217GI supports only one DIMM slot
1
Standby Power LED
COM 2: RS232
COM 3: RS232 (Tx/Rx/GND/ccTalk)
COM 4/5: RS232 (Tx/Rx/
±
12V/GND)
COM 3
COM 4/5
COM 1: RS232/RS422/RS485