Moxa Technologies INTELLIO C218 Manuel d'utilisateur télécharger pdf (Page 16)

2-4 Intellio C218Turbo /PCI User's Manual

Operating Opt8J

Opt8J is the RS-422/485 connection box with 8 port female DB25 connectors for

MOXA 8 port boards, including the Intellio C218Turbo/PCI. There are 8-DIP

switches on the side of the Opt8J. Each switch controls the communication mode

(RS-422 or RS-485) of each port, respectively.

RS-422/485 Port Switch of Opt8J

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DIP

ONDIP

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.

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Moxa Technologies INTELLIO C218 Manuel d'utilisateur Page 16