Many thanks Pablo! I will use it connected pin J17-4 to a 12VDC power supply through an external Schottky barrier diode, used to prevent polarity inversion, cause i think that the internal protections diode are, bypassed when i use this kind of configuration. Is it right?
By “this configuration” you mean applying 12V to J17-4? I’ve been looking at the schematics and I believe this is not the case. But it’s always a good idea to prevent any possible issue, so I would suggest you to use the Schottky barrier diode for prevention.