Hi arnaldo,
It is an interesting route which you have chosen to provide a I2S signal with MCK to your PS Audio PWDMK2 Dac. The HifiberryDac+Pro should work as an interface in this way. This module also has audio output connectors and is known for its exceptional price/performance. When you post your photos it would be interesting if you could tell us about the difference in sound quality between the audio output of the PS Audio PWDMK2 and the HifiberryDac+Pro.
janui