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©Vecow SPC-4000 User Manual
GETTING TO KNOW YOUR SPC-4000
2.2.1.10
Serial Port COM (Isolated)
Serial port can be configured for RS-232, RS-422, or RS-485 with auto flow
control communication. The default definition is RS-232. If you want to change
to RS-422 or RS-485, you can find the setting in BIOS.
BIOS Setting
Function
COM 1
COM 2
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-485 w/z auto-flow control
MDI1_N
MDI3_P
MDI3_N
COM 1/COM 2 pin assignments are listed in the following table
:
Serial
Port
Pin
No.
RS-232
RS-422
(5-wire)
RS-422
(9-wire)
RS-485
(3-wire)
1 to 4
1
DCD
TXD-
TXD-
DATA-
2
RXD
TXD+
TXD+
DATA+
3
TXD
RXD+
RXD+
-----------
4
DTR
RXD-
RXD-
-----------
5
GND
GND
GND
GND
6
DSR
-----------
RTS-
-----------
7
RTS
-----------
RTS+
-----------
8
CTS
-----------
CTS+
-----------
9
RT
-----------
CTS-
-----------
VGA
HDMI
LAN 1
LAN 2
Isolated
COM 2
Isolated
COM 1
