The Schneider VW3A9705 is an IP21 wall-mount housing kit for Altivar variable speed drives, size 3. It's a protection accessory that keeps the drive enclosure sealed against falling dirt and dripping water — IP21 is the minimum for a clean, dry indoor panel, so it's sized for cabinet-free mounting right on the machine frame or a backplate. The kit includes all the mechanical parts: a pre-cut plate for fixing cable glands, fixing accessories, and an instruction sheet. That pre-cut plate saves you drilling time — the gland entries are already laid out for the size 3 drive's cable diameters, so you're not field-modifying the enclosure.
Designed specifically for Altivar variable speed drives in size 3 — that covers a range of drive power ratings in the Altivar 12, 212, 312, and 71 families. You're bolting this onto the drive chassis to convert a standard IP20 open-drive into an IP21 stand-alone unit for wall mounting. No DIN rail involved; it's a screw-fixed enclosure kit.