The 6SL3520-0XK00-3AF0 is the entry point to the SINAMICS G115D distributed wall-mounted drive family. At 0.37 kW with a 1.23 A rated output, it is the lowest-power variant in the FSA frame — purpose-built for light conveyor sections, small roller beds, and auxiliary material handling tasks where a full-size drive would be oversized. Like every G115D, it mounts directly on the machine frame near the motor, eliminating the control cabinet, long motor cables, and the associated installation cost of a centralized VFD architecture. With IP65 protection and an operating range of −30 °C to +40 °C, it handles the same harsh logistics environments as higher-power G115D models.

When should I choose the 0.37 kW model over the 0.55 kW?

Both models share the identical FSA frame footprint — 380 mm wide, 216 mm high, and 129 mm deep. The decision comes down to the mechanical load. If the conveyor section is moving lightweight goods at moderate speed — small cartons on a roller bed, empty-tote return lines, or indexing gates — the 0.37 kW variant is the correctly sized choice that avoids overspending on unused capacity. The 0.55 kW model serves the same role for marginally heavier sections. There is no physical mounting or wiring difference between the two — the power rating is the sole selection variable.

Does the entry-level model compromise on protection or safety?

No. The 0.37 kW FSA variant carries the same IP65 / IP66 / UL Type 4X enclosure rating as every other G115D regardless of power. It includes Safe Torque Off (STO) as standard — configurable via a fail-safe digital input (F-DI) or over PROFINET using PROFIsafe — and supports the full control suite: V/f, V/f ECO, and sensorless vector control. The integrated EMC filter meets Category C2 for industrial environments. What scales with power is the output current, not the feature set or the enclosure integrity.

Frequently Asked Questions

What is the difference between the AF0, AA0, and AB0 I/O variants?

The suffix codes denote the I/O interface configuration — specifically the type and arrangement of digital inputs, digital outputs, and communication connectors populated on the unit. The exact mapping for each suffix requires the G115D operating manual. Across all three variants, the core drive parameters — power, voltage, frequency range, frame size, and protection class — are identical. Selection between suffixes is a field-wiring decision, not a performance decision.

Which motors is the 0.37 kW G115D compatible with?

The G115D is designed for direct mounting on SIMOGEAR 2KJ8 geared motors with IE3 three-phase asynchronous motors or IE4 synchronous reluctance motors. The drive performs automatic motor adaptation when commissioned via TIA Portal, reading the motor data from the electronically identifiable SIMOGEAR gearbox. The maximum recommended motor cable length is 15 m at the default 4 kHz pulse frequency.

Can this drive operate without a PROFINET network?

Yes. While the G115D is PROFINET-ready, it also supports basic operation via its digital I/O — start/stop, direction, and fixed-speed selection can be wired directly to the onboard terminals. EtherNet/IP is supported as an alternative fieldbus for non-Siemens PLC environments. Full parameter access and diagnostics do require a network connection, but basic conveyor control functions run standalone.