The ABB 3ADT218518S0231 is a DCS880-S02-0075-04 DC converter in frame size H1, rated for 400 VAC input and 75 A output in a 4-quadrant regenerative configuration. It operates at 50 Hz and carries three analog inputs and two analog outputs.
Frame H1 determines the mechanical footprint and mounting pattern — verify panel cutout and gland plate clearance against your existing layout before committing the BOM. The 4-quadrant designation means the converter can regenerate power back to the line during deceleration or overhauling loads, which affects braking resistor selection and DC-link sizing. Auxiliary terminals carry an IP00 rating per IEC 60529 and IEC 60947-1, meaning no protection against dust ingress or moisture at those connection points — plan for enclosure-level sealing if the installation environment is dirty or damp. The 55 dB(A) sound level is a typical fan-cooled converter noise figure for this power class; it is not a selection parameter unless the panel sits in a noise-sensitive area like a laboratory or open office.