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©Vecow SPC-5000 User Manual
GETTING TO KNOW YOUR SPC-5000
2.4.1.7 JCOM1, JCOM2, JCOM3, JCOM4 : Serial Port
Serial port 1 to 4 (JCOM 1 to 4) can be configured for RS-232, RS-422, or RS-485
with auto flow control communication. The default definition of COM 1 to 4 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 (JCOM1)
COM 2 (JCOM2)
COM 3 (JCOM3)
COM 4 (JCOM4)
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-485 w/z auto-flow control
1
10
The 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, 2
3, 4
1
GND_EARTH GND_EARTH GND_EARTH GND_EARTH
2
GND
GND
GND
GND
3
RI
-----------
CTS-
RI
4
DTR
RXD-
RXD-
-----------
5
CTS
-----------
CTS+
-----------
6
TXD
RXD+
RXD+
-----------
7
RTS
-----------
RTS+
-----------
8
RXD
TXD+
TXD+
DATA+
9
DSR
-----------
RTS-
-----------
10
DCD
TXD-
TXD-
DATA-
JCOM1
JCOM2
JCOM3
JCOM4
