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2.3.5 RS-232/422/485 Selection
COM3 and COM4
support 9-wire
RS-232, RS-422
and RS-485
inter faces.
The system detects
RS-422 or
RS-485 signals automatically in RS-
422/485 mode.
To select
between
RS-422/485 and
RS-232 for COM3, adjust JP4.
To select
between
RS-422/485 and
RS-232 for COM4, adjust JP5.
Jumper
setting for RS-422/485 interface: (Default setting). (JP4
and JP5)
Figure 2.3: RS-422/485 jumper
setting
Jumper
setting for RS-232
interface: (JP4 and JP5)
Figure 2.4:
RS-232 jumper
setting
UNO-2170 User Manual 10