Connecting a Lexicon MX200 to a UR824

Hiya folks.
I was hoping to use my Lexicon MX200 reverb unit as an external effects rack with my UR824, but was unsure of how to connect the two. The MX200 has coaxial S/pdif in/out, will a toslink cable work with this, or do i need to get a S/pdif to ADAT cable (if such a thing exists) or some kind of adapter/converter?