Not exactly, KY9 boards have no LON controllers, only work for simplex Tac22. KY8 has 2 LON controllers, cat and hall, so work for simplex TAc20. All duplex require a KY7 because they have all 3 LON controllers populated. The third is for the group. Those are the old part numbers though, all of the newer boards KY10 and KY14 have all 3 so can replace any 188e.
