I'm running a Beckhoff cx1020.

12Vdc isn't a problem, 5v 12v 24v, whatever you want.

But I'm not a fan to use another control system next to my PLC.
The Beckhoff is stable as hell and this is the system I choose therefor.

Isn't there another solution?

Isn't it possible to run the lambda sensor without the Arduino?

RS232 could be an option, there is a card and it isn't to expensive :)
Any analog signal is ok.

Hi,

I do not use Arduino, I'm running an industrial Beckhoff PLC.
Programming isn't a problem, I will only need to buy an analog input for my PLC.

Can you tell what I need to install your system to my PLC?
Does it have an analog output or similar?