Hola.

¿Cuáles son las aplicaciones de las entradas y salidas diferenciales?

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Hi.

What are the applications of differential inputs and outputs?

Hi,

the diferential inpust are less prone to disturbtion. If  on the line from signal source to PLC a i. g voltage spike is induced it will be  in the diferentila input not disturb as the spike will be on both diferentila wires.

So the diferentila inpus is useful i. g for positiong sensor of an axis. The same is valid for diferentila outpus