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Intellio C218Turbo /PCI User's Manual 2-5
RS-422 Mode
Set the respective switch to OFF position to use RS-422 interface. This means the
port is always ready to transmit and receive data simultaneously (full-duplex).
RS-485 Mode
The Opt8J supports only 2-wire RS-485 communication. Set the respective switch to
ON position to use RS-485 interface. This means the port can transmit data only
when RTS is asserted, and receive data only when RTS is not asserted (half-duplex).
Refer to Chapter “Connection Option (Opt8x) and Cable Wiring” for RS-422/RS-
485 cable wiring. And also to Chapter “Serial Programming Tools” for Opt8J RS-
485 programming details.