An older water plant with a PROFIBUS master still in service, no room in the cabinet for another filter, and a drawing that calls for four or more relay outputs or a second Pt1000. Those three together are what 6SL3230-2YE26-1AP0 is for. C2 suppression is inside the drive, so the enclosure door needs no external filter. The DP port is on board, so no gateway sits in the line. The I/O extension is fitted at the factory, with two digital inputs, two analog inputs, two analog outputs, four relay outputs, and two Pt1000 or Ni1000 sensors wired straight in.

PROFIBUS is a narrowing road, so do not put it on a new line. If the master is moving to PROFINET, take the 1AF0; the power stage, the filter and the extension all stay. If the plant only has a serial trunk, the 1AB0 is the one. Look the other way as well. When the cabinet already handles EMC centrally and the drawing uses only the basic I/O set, you are paying for two things you will not use. The 1UP0 drops the C2 stage, and the 0UP0 drops the extension too.

The datasheet gives 26 A rated at 400 V IEC and 21 A at 480 V NEC, with 18 A in HO duty. The 35 A maximum output is a separate, short-time figure. Feeders, breakers and contactors go on the rated number, because sizing on 35 A lands one frame too big. Take the depth from the same mechanical data, 140 mm wide, 295 mm high and 218 mm deep. Since the 11 kW and 15 kW builds share this FSC frame, a later step up does not redraw the cutout.