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Basic RS422 Connections


Connecting two 4-wire RS422 devices is a fairly simple task. One pair of twisted wires is used for Receive, the other for Transmit.


rs422 test


Some applications use a 2-wire RS422 configuration, where a master uses one wire pair and ground to talk to multiple devices that receive only, no transmission. This RS-422 configuration for long distance and multi-drop to connect multiple listeners.