27
UNO-1252G User Manual
Appendix A
S
ystem
Settings
and
Pin
A
ssignments
The terminal resistance is recommended to be used for long distance signal trans-
mission in RS-485 mode.
A.3
Isolated RS-232 Standard Serial Port (COM2)
Table A.3: Jumper for COM1 RS-232/485 switch
Mode
RS-232
RS-485 with terminal
resistance
RS-485 without
terminal resistance
Switch (SW8)
Setting
Table A.4: RS-232 Serial Port PIN Assignment
Pin
Pin Name
1
DCD
2
RxD
3
TxD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
1
5
9
6
3
2
4
7 8
Summary of Contents for UNO-1252G Series
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Page 35: ...Appendix A A System Settings and Pin Assignments...