As his impressive form continued, the Wexford man made the move to Cardiff Blues in 2012 and has played 37 times for the Welsh region to date, scoring six tries.
Most recently Copeland was man-of-the0match in the Blues' 19-15 victory over defending Heineken Cup champions Toulon in October, just days before his 26th birthday.
Commenting on the announcement, Munster head coach Rob Penney said: "We've seen Robin in action first hand and we've always been hugely impressed by his potential.
Date of Birth: October 23, 1987
Birthplace: Wexford, Ireland
Height: 1.96m (6ft 5in)
Weight: 110 kg (17st 4lb)
Position: Back rower/Lock