The ABB 3ADT218587S0231 is a DCS880-S02-1500-04 DC converter — a four-quadrant regenerative unit rated 400 VAC input and 1500 A output, built on the H6 frame. This is the part you spec into a BOM when you need a DC drive that can both motor and brake a large DC motor, returning energy to the line instead of dumping it across a resistor bank.
The 1500 A output is the continuous rating at the listed voltage — that's the number that decides whether this converter handles your motor's armature current without oversizing. The H6 frame is the physical envelope: it dictates cabinet cutout, busbar spacing, and the mounting footprint. If your panel is laid out for a smaller frame, you're looking at a re-spin of the gland plate and buswork. At 73 dB(A) it is audible in a control room. Plan for ear protection if operators stand near it continuously. The auxiliary terminals carry an IP00 rating per IEC 60529 and IEC 60947-1 — meaning they are not protected against dust or splash. That's normal for a cabinet-mounted drive where the enclosure provides the overall IP rating, but it means you cannot run this converter with the cabinet door open and the aux terminals exposed.
This is a four-quadrant DC converter — it handles forward motoring, forward braking (regeneration), reverse motoring, and reverse braking. Typical applications are large DC motor drives in cranes, hoists, winders, extruders, and test stands where regenerative braking is required. The three analog inputs and two analog outputs give you speed reference, torque limit, and feedback channels without an extra I/O module. Rated for 50 Hz supply.