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2.2.9 JCOM1 ~ JCOM5 : COM Port Header
Serial port 1 to 5 (JCOM 1 to 5) can be configured for RS-232, RS-422, or RS-485
with auto flow control communication. The default definition of COM 1 to 5 is RS-232,
if you want to change to RS-422 or RS-485, you can find the setting in BIOS.
1
19
4
1
4
10
The pin assignments are listed in the following table :
Serial
Port
1, 2
3, 4, 5
©Vecow UMBC-1100 User Manual
7
7
7
1
BIOS Setting
COM1 (JCOM1)
1
COM2 (JCOM2)
COM3 (JCOM3)
COM4 (JCOM4)
COM5 (JCOM5)
Pin No.
RS-232
1
GND_EARTH
2
GND
3
RI
4
DTR
5
CTS
6
TXD
7
RTS
8
RXD
9
DSR
10
DCD
8
2
4
1
2
1
7
1
7
1
7
7
1
2
8
2
1
1
1
1
1
8
2
7
10
10
1
1
1
10
10
1
7
JCOM1 JCOM2 JCOM3 JCOM4 JCOM5
RS-485 w/z auto-flow control
RS-422
(5-wire)
GND_EARTH
GND_EARTH
GND
-----------
RXD-
-----------
RXD+
-----------
TXD+
-----------
TXD-
GETTING TO KNOW YOUR UMBC-1100
1
1
2
12
30
8
2
2
2
8
8
8
1
11
1
1
1
7
7
7
7
1
10
1
10
1
10
1
4
1
4
Function
RS-232
RS-422 (5-wire)
RS-422 (9-wire)
RS-485
RS-422
RS-485
(9-wire)
(3-wire)
GND_EARTH
GND
GND
CTS-
RI
RXD-
-----------
CTS+
-----------
RXD+
-----------
RTS+
-----------
TXD+
DATA+
RTS-
-----------
TXD-
DATA-
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