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UNO-148 User Manual
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2.2.9
COM Connector
UNO-148 has 4 x COM RS232/422/485 ports of terminal block type. They offer trans-
mission speeds of 50 ~115.2 kbps.
The default mode for both COM ports (COM1&COM2) is RS-232 Mode. Settings can
be adjusted via an on-board switch (SW1).
Table 2.2: COM Connector Pin Assignments
Pin COM1 Mode
Signal Name
Pin COM2 Mode
Signal Name
1
RS232
CTS
2
RS232
CTS
RS422
T-
RS422
T-
RS485
D-
RS485
D-
3
RS232
RXD
4
RS232
RXD
RS422
T+
RS422
T+
RS485
D+
RS485
D+
5
RS232
TXD
6
RS232
TXD
RS422
R+
RS422
R+
RS485
RS485
7
RS232
RTS
8
RS232
RTS
RS422
R-
RS422
R-
RS485
RS485
9
RS232
GND
10
RS232
GND
RS422
GND
RS422
GND
RS485
GND
RS485
GND