The SINAMICS G115D 6SL3520-0XH01-5AB0 is the 1.5 kW wall-mounted distributed drive in FSA frame — the highest-power variant in the fanless FSA size class of the SINAMICS G115D series. Operating entirely on natural convection through the IP65-sealed aluminum housing, it delivers 4.1 A rated output current with 200% overload for 3 seconds — sufficient for zone roller conveyors, transfer carts, and light belt sections. With no fan to maintain or fail, the FSA is the lowest-maintenance option in the G115D lineup. PROFINET with PROFIsafe provides Safe Torque Off over Ethernet without dedicated safety wiring.

Why choose FSA at 1.5 kW over stepping up to FSB?

The FSA frame (380 × 216 × 129 mm) is meaningfully more compact than FSB (425 × 180 mm) — nearly 55 mm shorter in width and shallower in depth. For conveyor sections where space is tight — between roller beds, inside machine frames, or on narrow mounting brackets — FSA fits where FSB cannot. The fanless design also eliminates the one moving part most likely to require service in dusty environments. If 1.5 kW covers the load, staying with FSA saves space and maintenance. Only move to FSB 2.2 kW when the driven roller or belt section genuinely exceeds 1.5 kW mechanical demand.

What motors and gearboxes can it drive?

Direct mounting to SIMOGEAR 2KJ8 geared motors in IE3 (asynchronous) or IE4 (synchronous reluctance) efficiency classes. Integrated 400 V AC brake control eliminates external brake contactors and rectifiers. Encoderless vector control supports V/f and sensorless vector control modes. Dual-protocol PROFINET and EtherNet/IP on the same interface accommodates mixed-vendor PLC environments.

How does fanless cooling work at 1.5 kW?

The FSA aluminum housing acts as a heat sink — power-stage losses conduct through the baseplate into the housing surface, where natural air convection dissipates heat. The IP65 seal prevents dust and moisture ingress while the housing temperature stabilizes within safe limits up to 40 °C ambient. No ventilation openings, no filter to clean, no fan bearings to wear. For food-and-beverage adjacent areas or dusty packaging lines, the sealed fanless design reduces cleaning and maintenance intervals compared to fan-cooled alternatives.

Frequently Asked Questions

Can FSA handle frequent start-stop cycles without a fan?

Yes — the FSA thermal design accounts for the higher losses during acceleration. The 200% overload capability for 3 seconds covers startup torque demand, and the aluminum housing thermal mass absorbs intermittent heat spikes. Sustained high-torque operation at low speeds (below 10 Hz) may require verifying the application duty cycle against the drive's thermal derating curve — consult the SINAMICS G115D operating instructions for the full thermal envelope.

What is the difference between this 1.5 kW FSA and the XM01/XH01 I/O Control variant?

The power stage and mechanical platform are identical. The AB0 suffix adds PROFINET/PROFIsafe/EtherNet/IP communication, while AA0 (I/O Control) variants use discrete digital and analog I/O for speed control and feedback. Choose AB0 when the conveyor is part of a networked automation system with safety over PROFIsafe; choose AA0 for standalone conveyor sections controlled by hardwired signals from a PLC or local control panel.