The 6SL3520-1XK02-2AF0 is the entry point of the G115D FSB frame at 2.2 kW — the stepping stone from the compact FSA range to the mid-power FSB platform. Rated for 5.9 A continuous and 11.8 A peak output (200% for 3 seconds), it covers conveyor sections and transfer stations that have outgrown the 1.5 kW FSA limit but do not require the full 4 kW FSB capacity. The AF-suffix variant adds enhanced communication for SIMATIC-controlled distributed automation networks.

The 425 × 180 × 134 mm FSB enclosure — wider and taller than the FSA — mounts directly on the machine with IP65 protection (connectors) or IP66 (cable glands). An integrated C2 EMC filter, internal braking resistor, STO SIL 2 via Profisafe, and SAM web-server commissioning are standard. IE2/IE3 asynchronous and IE4 synchronous reluctance motors are supported with V/f or vector control from 0–550 Hz.