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
