The SINAMICS G115D 6SL3520-2XB41-5AF0 is the PROFINET variant at 1.5 kW in the compact FSA frame — the smallest G115D enclosure with full fieldbus integration. It carries an NCNR (Not Suitable for New Designs) status. At 380 × 156 × 129 mm, it delivers 4.1 A HO rated continuous output with PROFINET, PROFIsafe, and EtherNet/IP over a single M12 cable — all within a footprint barely larger than a terminal box.

What makes the FSA frame with PROFINET unique?

FSA is the only G115D frame where the drive's physical size approaches that of a traditional motor starter while delivering full variable-speed control. Adding PROFINET gives this compact drive daisy-chain cabling with the integrated 2-port M12 switch — each drive on the conveyor segment connects to the next with a single cable, eliminating the star-wiring topology that discrete I/O would require. For conveyor lines with ten or more drives, the cabling savings alone can justify the PROFINET variant.

What happens above 1.5 kW?

At 2.2 kW, the drive steps up to the larger FSB frame (425 × 180 mm). The FSA enclosure cannot dissipate the higher continuous current thermally, so the transition is mandatory. If the application sits at or below 1.5 kW, FSA is the optimal choice — same G115D platform, same PROFINET capability, minimum mounting footprint.

How does the PROFINET variant compare to the I/O variant at 1.5 kW?

The AF0 and AB0 share the identical 1.5 kW FSA power stage. The AF0 replaces the AB0's digital I/O terminals with M12 PROFINET ports carrying control, diagnostics, and PROFIsafe safety data. For machines with an existing PROFINET backbone, the AF0 variant turns each drive into a network node rather than a terminal-block endpoint.