What the order code carries
The ACS880-M04-078A-5 + J400: The +J400 suffix is a factory option bundle built at the ABB order entry — it is not a field retrofit, so the BOM has to call it out on the PO line.
Handling and panel mounting
Listed at 21.32 kg, the drive is firmly in one-person-installer territory — a wall-mount bracket and a second pair of hands at the cable landings is enough, no hoist or lifting fixture required.
Where the M04 sits against ACS880-01 siblings
The ACS880-01-065A-5 is the nearest mass neighbour at 23.13 kg; the ACS880-01-040A-5 sits at 18.14 kg and the ACS880-01-034A-5 at 10.43 kg. Weight is not the decision — the current rating and option-code suffix are.