What does the suffixes W and WS mean on ATV320...W and ATV320...WS?

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Issue :
Meaning of "W" suffix on the ATV320.

Product Line :
Altivar Drive

Environment :
ATV320

Cause :
Looking for an enclosed ATV320

Resolution :
The ATV320 that comes with the "W" or "WS" suffixes are both enclosed units. Enclosure rating is UL Type 12 /IP66.
"W" is without a Vario line disconnect switch
"WS" is with a Vario line disconnect switch