Thx hanermo, I follow your meaning. But it doesn't help me to solve the current problem.

I can get the sinumerik 840d SL PLC for 700 USD. My question is what else do I need.

Integrator will be myself. I will write and develop the post by meself. I have time plenty on my hands.

I am looking for a comprehensive answer of what different components the sinumerik requires to function and for example, clear picture schematics to get the idea what controls what and how things are connected

Sent from my Redmi Note 4 using Tapatalk