21
(9) COM1/2/3/4/5/6 (9-pin): Serial Port Header
COM1 (9-pin): RS232/422/485 Serial Port Header
COM2/3/4/5/6 (9-pin): RS232 Serial Port Header
2
Pin1
3 4 5
6 7 8 9
Pin NO. RS232
*RS422
(COM1)
*RS485
(COM1)
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
header can function as RS232/422/485 port. In normal settings
COM1 functions as RS232 port. With compatible COM cable
COM1
can function as
RS422 or RS 485 port. User also needs to go to BIOS to set ‘
Transmission Mode
Select
’ for COM1 as [RS422] or [RS485] for boards that support RS422/485 function
before connecting compatible COM cable to COM1 header.
COM2
COM6
COM4
COM1
(RS232/422/485)
COM3
COM5
