The Win32_PnPDevice represents an association between a device (known to Config Manager as a PnPEntity), and the function ...

The Win32_PnPDevice represents an association between a device (known to Config Manager as a PnPEntity), and the function it performs. Its function is represented by a subclass of the logical device that describes its use. For example, a Win32_Keyboard or Win32_DiskDrive. Both referenced objects represent the same underlying system device - changes to resource allocation on the PnPEntity side will effect the associated Device.