16
The system is equipped with 4 COM ports that enable serial communication.
The COM 1 and COM 2 ports can be switched between typical RS232 or
RS232 with power on its Pin NO.1 (12V) and Pin No.9 (5V).
Communication Port Pin Assignments
The system is also equipped with 3 display ports: DVI-D, HDMI, and VGA.
COM 1/COM 2 (RS232 with power/422/485)
COM 3~COM4 (RS232/422/485)
Align this edge with the
left side of the connector
Angled-corner
(up)
Angled-corner
Aligning side
(left)
pin
Notes:
1.
The DVI-D port can be in HDMI or DVI-D.
2. The HDMI is a DP++/HDMI combo port but can only transmit HDMI signals (unless wired as
a DP++ port). Please plug in an HDMI cable with the right orientation and alignment to avoid
damage to the connector. You should feel resistance (due to a pin on the right) if the cable is not
inserted correctly. Please see a video at https://youtu.be/SUj07rfN5l8 for detailed instructions.
DVI-D
(DVI-I connector)
HDMI
VGA
6
7 8 9
1 23 4 5
DCD
(or
+12V)
RXD TX
D
DT
R
GND
DSR RT
S
CTS RI
(or
+5V)
N.C. N.C. N.C. N.C.
2 4 5
3
1
7
6
8 9
RXD+ RXD- TX
D+
TX
D-
GND
DA
TA
+
DA
TA
-
N.C. N.C. GND
2 4 5
3
1
7
6
8 9
N.C. N.C. N.C. N.C.
RS232
RS422
RS485
COM 2
COM 3 COM 4
COM 1
