FR 5020 then FR 6921 at Dublin
Pisa → Dublin → Barcelona
Timetable, Dublin time
15:40FR 5020 from Pisa at the gate
08:30FR 6921 to Barcelona leaves the gate
16 h 50 apart on the timetable, overnight
FR 6921 leaves 16 h 50 after FR 5020 arrives on the timetable: more than half a day, so not a connection we count.