Advantech UNO-1170E user manual 4 RS-232/422/485 Selection

2.3.4 RS-232/422/485 Selection

COM2 and COM3 support 9-wire RS-232, RS-422 or RS-485 interfaces, and you can set corresponding jumpers to select serial ports as RS-232 or RS-422/485 interfaces shown in Table 2.2. Please note to reset the system to adapt this configuration change

The system detects RS-422 or RS-485 signals automatically in RS-422/ 485 mode.

Table 2.2: Selecting RS-232/422/485 (COM2&3)

Serial Port	Corresponding Jumper to Select RS-232/422/485
COM3	CN13

Jumper Setting for RS-422/485 Interface: (Default Setting)

Figure 2.5: RS-422/485 Jumper Settings Jumper Setting for RS-232 Interfaces:

Figure 2.6: RS-232 Jumper Settings

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