The two terminal blocks on the back of the CS-800 are both 10-position 3.81mm euro-style pluggable terminal blocks with captive flanges from Phoenix Contact. The Phoenix part number is 1827787. You may be able to find them at electronics wholesalers such as Allied, Digikey, Mouser, Future, etc.
Or, you can order them from Interactive Technologies. Our part number is CS-PTB10.