Vecow MTC-4015 User Manual page 26

2.3.4 Serial Port COM
DC-IN 6~36V
V+ V
On | Off
IGN
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
COM 1 (CN7) /
COM 2 (CN8) /
COM 3 (CN11) /
COM 4 (CN12)
The pin assignments are listed in the table as follow :
Serial Pin No.
Port
1
2
3
1, 2
4
5
3, 4
6
7
8
9
DIO
USB 2.0 Isolated 3 4
20 11
10 1
PIN 1 ~ 8 D I PIN 11 ~ 18 DO
LAN4
LAN3
Function
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-485 w/z auto-flow control
RS-232 RS-422
(5-wire)
DCD
RXD
TXD
DTR
GND
DSR -----------
RTS -----------
CTS -----------
RI -----------
PoE+
5 6
COM1
COM3
LAN6
LAN5
RS-422
(9-wire)
TXD- TXD-
TXD+ TXD+
RXD+ RXD+
RXD- RXD-
GND GND
RTS-
RTS+
CTS+
CTS-
GETTING TO KNOW YOUR MTC-4015
COM2
COM4
RS-485
(3-wire)
DATA-
DATA+
-----------
-----------
GND
-----------
-----------
-----------
-----------
19