I need a 24 volt DC output 60-80 watt AC/DC isolated encapsulated power supply. Can someone suggest a brand or model?

 

When purchased from any of the major Electronics-Supply-Houses You just about can't go wrong.
It all depends on the features You want or need, and all of them have a sophisticated search function.
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I use Recom for the encapsulated ones but at the power level you want they do not make them. Enclosed power supplies get pricey as you go up in power.
Open frame types are cheapest and enclosed ones are reasonable also. It depends on if the application really needs a sealed supply or not. you might be able to
split up your loads to use several of their smaller units

 

MeanWell are pretty good.

 

DiigiKey has a good selection and only sells good quality items.
Not cheap by any standard, though.