The SINAMICS G115D 6SL3520-0XE44-0AB0 is the 4 kW wall-mounted distributed frequency converter in FSB frame with PROFINET communication — the first fan-cooled power tier in the SINAMICS G115D series, marking the transition where FSB requires integrated active cooling. Designed for mid-power conveyor zones in greenfield PROFINET plants, it delivers 10.2 A rated output current with 200% overload for 3 seconds, driving IE3 asynchronous or IE4 synchronous reluctance motors via direct SIMOGEAR 2KJ8 geared motor mounting. The integrated 2-port PROFINET switch with PROFIsafe tunnels STO over Ethernet — eliminating dedicated safety wiring at a power tier where many conveyor applications (merge units, accumulation zones, incline sections) require functional safety.

What does PROFINET add to the 4 kW FSB platform?

The AB0 variant integrates dual-protocol PROFINET and EtherNet/IP on a single interface, with PROFIsafe tunneling STO and safety-rated feedback over the same cable that carries cyclic process data. An integrated 2-port switch enables daisy-chain line topology — critical for long conveyor lines where running a dedicated Ethernet drop to every 4 kW drive would multiply switch ports and cabling cost. For mixed-vendor plants, the drive simultaneously accepts EtherNet/IP connections from Rockwell or third-party controllers alongside PROFINET communication. The 4 kW FSB fan-cooled platform (425 × 180 × 169 mm, 7.52 kg) fits the same mounting footprint as the fanless 3 kW FSB — only 35 mm deeper to accommodate the integrated fan.

What motors and gearboxes can it drive?

The 6SL3520-0XE44-0AB0 is optimized for direct mounting to SIMOGEAR 2KJ8 geared motors in IE3 or IE4 efficiency classes. Integrated 400 V AC brake control eliminates external brake contactors and rectifiers. Encoderless vector control delivers speed regulation without a feedback device, supporting both V/f control and sensorless vector control for precise ramp-controlled acceleration and deceleration. The Q8/0 motor connector and M12 signal interfaces enable quick commissioning with pre-assembled Siemens cables.

Frequently Asked Questions

What is the difference between XE44 and XH24 for the same 4 kW rating?

XE44 and XH24 are catalog designations for the same 4 kW FSB fan-cooled hardware — mechanically and electrically identical. Both support AB0 and AF0 variants. Drives are functionally interchangeable; the XE vs. XH prefix reflects commercial catalog organization, not hardware differences.

Can this drive run on an existing AS-Interface network?

No — the AB0 variant communicates exclusively via PROFINET and EtherNet/IP. For AS-Interface integration, choose the AF0 variant (e.g., 6SL3520-0XE44-0AF0). For hardwired control, the AA0 I/O Control variant provides discrete I/O terminals.

Does this drive support STO without PROFINET?

Yes — STO is also available via the fail-safe digital input (F-DI), independent of PROFINET communication. The F-DI accepts a 24 V DC safety signal from an external safety relay or emergency stop circuit, providing SIL 2/PL d functional safety for EtherNet/IP applications.