What the order code is
The ACS880-04-503A-5+E208: The +E208 suffix rides on the base ACS880-04-503A-5 code and travels with the drive's factory option set; the listing carries the bare code without decomposing the option flag into separate rating fields, so the option content sits in the option-code sheet rather than the spec table.
Frame-class context against the ACS880-01 wall-mount line
The ACS880-01 wall-mount siblings — ACS880-01-156A-5 at 55.00 kgs, ACS880-01-065A-5 at 23.13 kgs, and ACS880-01-040A-5 at 18.14 kgs — sit in a different footprint and mass class from the ACS880-04 frame, so a panel specified around any ACS880-01 code will not accept the ACS880-04-503A-5+E208 without re-laying the cabinet floor and re-doing the lifting / ventilation plan.
Sourcing posture for the BOM line
Specify the full string ACS880-04-503A-5+E208 onto the BOM line — including the +E208 option flag — so the option content travels with the order and the drive ships configured for its intended auxiliary / interface set out of the crate.