19
GETTING TO KNOW YOUR EVS-1000/1100
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; but 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
COM 3
COM 4
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-485 w/z auto-flow control
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 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-
-
COM 3 & COM 4 MB connector table :
COM Port
MB Connector
COM Port
MB Connector
COM 3
CN12
COM 4
CN13
COM 3 & COM 4 MB connector pin out :
CN
Pin No.
Signal Name
Pin No.
Signal Name
CN12 (COM3)
CN13 (COM4)
1
Chassis GND
6
TXD
2
GND
7
RTS
3
RI
8
RXD
4
DTR
9
DSR
5
CTS
10
DCD
