Vecow ARS-2000, User Manual

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GETTING TO KNOW YOUR ARS-2000 ©Vecow ARS-2000 User Manual
2.4 Bottom Panel I/O & Functions
2.4.1 COM Ports (Isolated COM)
COM1
Isolated
COM2 COM3 COM4
CFast
SIM 1
Serial port 1 to 4 (Light version: COM 1 to 2) can be configured for RS-232, RS-
422, or RS-485 with auto flow control communication. One of these COM ports,
COM 1 supports isolated function and with 2.5-KVRMS Isolation. The default
definition of COM 1 to COM 4 (Light version: COM 1 to 2) is RS-232; but if you
want to change to RS-422 or RS-485, you can find the setting in BIOS.
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 RI ----------- CTS- -----------
The pin assignments are listed in the table as below:
BIOS Setting Function
COM 1
COM 2
COM 3
COM 4
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-485 w/ auto-flow control