15
(4) COM1/2/3/4 (9-pin): Serial Port Header
COM1 &COM2
:
RS232/422/485 Serial Port;
COM3&COM4
:
RS232 Serial Port Header.
6
Pin 1
COM3
COM4
*COM2
*COM1
Pin NO. RS232
*RS422
(optional)
*RS485
(optional)
Pin 1
DCD
TX-
DATA-
Pin 2
RXD
TX+
DATA+
Pin 3
TXD
RX+
NC
Pin 4
DTR
RX-
NC
Pin 5
GND
GND
GND
Pin 6
DSR
NC
NC
Pin 7
RTS
NC
NC
Pin 8
CTS
NC
NC
Pin 9
RI
NC
NC
*Notice: COM1/2 header can function as RS232/422/485 port header.
In normal
settings COM1/2 functions as RS232 header. With compatible COM cable COM1/2
can function as RS422 or RS 485 header. User also needs to go to BIOS to set
‘
Transmission Mode Select’
for COM1 or COM2 at first, before using specialized
cable to connect different pins of this port.
(5) GPIO (10-pin): GPIO Port Header
VC
C
Pin1
2
G
PIO
77
G
PIO
75
G
PIO
73
G
N
D
G
PIO
76
G
PIO
74
G
PIO
72
G
PIO
66
G
PIO
71
*Note:
Maximum current limit is
1A
while using 5V working voltage.
GPIO