The 6SL3520-0XB41-1AF0 delivers 1.1 kW in the compact FSA frame (380 × 156 × 129 mm) with B-connector and PROFINET communication — the mid-range FSA G115D for decentralized conveyors needing fieldbus integration. Rated for 3.1 A continuous output (HO) at 380–480 V three-phase with 200% overload for 3 seconds, it steps up from the 0.75 kW FSA when the motor load exceeds the smaller drive's current capacity. Integrated PROFINET interface with PROFIsafe for STO over the same Ethernet cable and 2-port switch for daisy-chain line topology. Compatible with IE2/IE3 asynchronous and IE4 synchronous reluctance motors across 0–550 Hz.

When should I choose 1.1 kW FSA instead of 0.75 kW FSA?

The 0.75 kW FSA is rated for 2.2 A continuous (HO) and serves light conveyor zones within that current limit. When the motor requires more than 2.2 A — a larger roller drive, a belt conveyor with incline, or a zone accumulating heavier product — the 1.1 kW FSA at 3.1 A HO provides the next step up without leaving the FSA form factor. Both share the same 380 × 156 × 129 mm footprint and B-connector ecosystem, so no mechanical redesign is needed for the power upgrade. The 1.5 kW FSA (0XB41-5, 4.1 A HO) offers a further step within the same frame if additional headroom is needed.