Propane adapter from BBQ grill to large cylinder?

I just bought a Coleman Roadtrip LXE portable grill (it runs on propane) It runs on those little 16 oz canisters but it did come with a adapter/regulator to use the 20lb tank..I want to use a large cylinder tank that is around a 100lb tank..as long as i get the right connector from the large 100lb tank to the Coleman adapter/regulator will the higher pressure from the bigger tank be ok with the Coleman regulator or am i supposed to get a different regulator? I figured the regulator that came with the grill was designed to reduce whatever pressure its fed to the proper pressure for the grill but I'm not sure if this is correct. Thanks