Vecow ABP-3000 User Manual page 21

2.3.2 Serial Port
Serial port 1 to 4 (COM 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 and
COM 2 is RS-232, if you want to change to RS-422 or RS-485, you can find the
setting in BIOS.
BIOS Setting
COM 1
COM 2
COM 3
COM 4
The pin assignments are listed in the table as follows :
Serial
Port
1, 2
3, 4
©Vecow ABP-3000 User Manual
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-485 w/z auto-flow control
Pin No. RS-232
1 DCD
2 RXD
3 TXD
4 DTR
5 GND
6 DSR
7 RTS
8 CTS
9 RI
Function
RS-422 RS-422
(5-wire) (9-wire)
TXD- TXD-
TXD+ TXD+
RXD+ RXD+
RXD- RXD-
GND GND
----------- RTS-
----------- RTS+
----------- CTS+
----------- CTS-
GETTING TO KNOW YOUR ABP-3000
RS-485
(3-wire)
DATA-
DATA+
-----------
-----------
GND
-----------
-----------
-----------
-----------
14