FR 11 then FR 1948 at Dublin
Madrid → Dublin → Luxembourg
Timetable, Dublin time
19:55FR 11 from Madrid at the gate
12:30FR 1948 to Luxembourg leaves the gate
16 h 35 apart on the timetable, overnight
FR 1948 leaves 16 h 35 after FR 11 arrives on the timetable: more than half a day, so not a connection we count.