Serial Connections; Serial Type Selection; Figure 2.2:Com3 & Com4 Serial Selection - Advantech UNO-1019 User Manual

2.4 Serial Connections

2.4.1 Serial Type Selection

UNO-1019 provides 4 serial Com ports, COM1 & COM2 provide RS-
232, and COM3 & COM4 provide RS-232/422/485. The default settings
of COM3 & COM4 is RS-422/485, and the UNO-1019 could identify
RS-422 or RS-485 automatically according to your wiring. If users want
to change the serial type, the chassis can be opened and modified.
UNO-1019 User Manual
Figure 2.2: COM3 & COM4 Serial Selection
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