What you're specifying
The ACS880-01-065A-5: Mass is listed at 23.13 kgs, so plan the cabinet and the lift around a two-person carry rather than a single-installer mount; this is the heaviest unit in the quoted -065A-5 / -040A-5 / -034A-5 / -027A-5 group and the gap is large enough to change the panel-builder's handling plan, not just the spec sheet.
Why the frame class matters before you commit
Inside the ACS880-01 wall-mount family, the -065A-5 is the higher-current step relative to ACS880-01-040A-5; the 23.13 kgs versus 18.14 kgs spread is the kind of delta a controls integrator feels in the cabinet layout, not just on the BOM line. Stepping further down, the -034A-5 lists 10.43 kgs and the -027A-5 lists 10.41 kgs; that near-equal mass on the two smaller frames is a footprint-class signal rather than a procurement concern, and it tells you the -065A-5 and -040A-5 sit in a heavier cabinet-cutout class than the -034A-5 and -027A-5.