What unit is this?

[Aabeck]

It could be a pulse encoder - one pulse that the PLC counts to determine the speed. This would be my 3-wire guess.



It could be a speed generator, providing a 0-5 or 0-10VDC signal the PLC uses to determine the speed. These usually only have 2 wires though.

 

[waterbottle]

Is there an electrical print for the machine? Usually you can find the part number there or in the BOM

 

[seth350]

If it’s Italian, forget trying to find it. Best call the OEM.

 

[jraef]

You should never post, or open, files in any sort of doc format, they can easily contain viruses and worms.