The 6SL3520-1XH67-5AF0 is the most powerful drive in the G115D lineup: 7.5 kW at 38 A continuous output in the FSC frame, with PROFINET PROFIdrive and forced-air cooling via an integrated fan. This is the top of the wall-mounted distributed drive range — the largest motor a G115D can control without stepping up to the G120X cabinet-mount platform. At 425 mm tall and 240 mm wide, the FSC enclosure houses the highest power density in the G115D family, with the integrated fan enabling continuous operation at full rated current that natural convection alone cannot sustain above the 3 kW threshold.

FSC installation context

The FSC frame is the only G115D with active cooling — an integrated fan draws air across the heatsink to maintain thermal equilibrium at 7.5 kW continuous output. This adds a maintenance consideration absent from the fanless FSA and FSB frames: the fan is a serviceable component with a finite bearing life. Siemens designs the fan for the expected service life of the drive, but in high-duty or high-ambient installations, it is the one wear item to monitor. The drive continues to operate at reduced output if the fan fails, with automatic derating based on heatsink temperature — the PROFINET telemetry reports fan status, enabling condition-based replacement rather than calendar-based preventive maintenance.

PROFINET at the G115D ceiling

At 7.5 kW, this drive typically powers the main conveyor segment, the indexing turntable, or the pallet lift — the station that sets the pace for the entire line. PROFINET integration at this power level is not optional; it is the mechanism by which the line controller synchronizes acceleration and deceleration across multiple large drives, monitors torque to detect mechanical wear before failure, and logs energy consumption per station for ISO 50001 energy management. The AF0 suffix makes this capability native to the drive.