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Topic: RS422 and Arduino Schema is ok ? (Read 3523 times) previous topic - next topic


Apr 12, 2011, 03:05 pm Last Edit: Apr 12, 2011, 03:17 pm by Grag38 Reason: 1
I want to realise a transmission with 2xmax485 for 422 full duplex communication (TX+/TX-/RX+/RX-)

Is this schéma is ok for you. The length of the line will be < 10meters

Is it necessary or better to use optocopler like 4N28 ?

Thanks for your comments.


It looks fine.  You should not need or want opto-couplers.  You want something designed to overcome the influence of wire length... and these chips do that.


Thanks for a so speed answer ! I will realize that circuit.

I will tell you you more when my project will be efficient !


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