The SINAMICS G115D 6SL3520-0XH00-3AB0 is the 0.37 kW wall-mounted distributed frequency converter in FSA frame — the most compact PROFINET variant in the SINAMICS G115D series. Designed for the lightest conveyor zones in intralogistics and automotive assembly, it delivers 1.3 A rated output current with 200% overload capability for 3 seconds, driving IE3 asynchronous or IE4 synchronous reluctance motors via direct SIMOGEAR 2KJ8 geared motor mounting. PROFINET communication with integrated PROFIsafe enables Safe Torque Off (STO) over Ethernet — bringing full factory-level safety integration to short roller beds, diverter gates, and light-duty belt sections without a control cabinet.

Why choose PROFINET for a 0.37 kW conveyor zone?

Even the lightest conveyor zone benefits from Ethernet-based control when integrated into a plant-wide PROFINET architecture. The AB0 communication variant supports 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 — the drive connects to its upstream and downstream neighbors, eliminating the need for a dedicated star-wired Ethernet switch port at each conveyor zone. For mixed-vendor plants, the drive simultaneously accepts EtherNet/IP connections from Rockwell or third-party controllers.

What motors and gearboxes can it drive?

The 6SL3520-0XH00-3AB0 is optimized for 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 delivers speed regulation down to low frequencies without a feedback device, supporting both V/f control for basic conveyor sections 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.

What distinguishes the FSA frame?

FSA is the most compact SINAMICS G115D frame at 380 × 216 × 129 mm, relying entirely on natural convection through the IP65-sealed aluminum housing — no fan, no moving parts, zero fan-related maintenance. The passive cooling approach is sufficient for continuous operation up to 1.5 kW at 40 °C ambient, making FSA the ideal choice for space-constrained conveyor zones where fan noise or fan service access would be problematic. The built-in EMC filter meets Category C2 (EN 61800-3) for industrial environments, and the low 24 V DC consumption (under 300 mA) simplifies control panel power budgeting when multiple drives share a common DC supply.

Frequently Asked Questions

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 which connects to AS-i masters over the standardized two-wire yellow AS-i cable. For hardwired digital/analog control without a fieldbus, the AA0 I/O Control variant provides discrete I/O terminals.

What is the maximum cable length between drive and motor?

SINAMICS G115D is designed for direct motor mounting — the drive attaches to the SIMOGEAR 2KJ8 geared motor housing, minimizing motor cable length. For separately mounted configurations, Siemens recommends keeping motor cables under 5 meters to maintain EMC compliance. The IP65 enclosure eliminates the control cabinet, placing the converter at the point of use on the conveyor frame.

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 an alternative safety path for EtherNet/IP motion control applications requiring SIL 2/PL d functional safety.