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NT21 Serial Port Adaptor RS232 to RS422_x000D_
To convert either of the NT21 serial ports to RS422, this two or four wire connection adaptor plugs directly into the RS232 port. There are screw terminals for the RS422 connections and on board switches allow the selection of two or four wire and terminator setting for the physical ends of the RS422 network. Up to eight NT21 touch screens can be connected to one Omron PLC serial port via these adaptors using NT Link 1:N protocol settings. Recommended cable for four-wire connection is Belden 9729 (stock no. 802-373).
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