The SINAMICS G115D 6SL3520-0XH07-5AB0 is the 7.5 kW wall-mounted distributed frequency converter in FSC frame — the highest-power variant in the SINAMICS G115D series. Designed for horizontal conveyor applications in intralogistics and automotive assembly, it delivers 17.1 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 without dedicated safety wiring — a decisive advantage over hardwired I/O Control variants in safety-critical conveyor zones.

What does PROFINET with PROFIsafe bring to this drive?

The AB0 communication variant integrates dual-protocol PROFINET and EtherNet/IP fieldbus support on a single interface. PROFIsafe, the Siemens functional safety protocol, tunnels STO and safety-rated feedback over the same PROFINET cable that carries cyclic process data — no separate safety relay, no dedicated hardwiring, no additional cabinet space. Safety logic is configured in TIA Portal and executed over the existing network. For mixed-vendor plants, the drive simultaneously accepts EtherNet/IP connections from Rockwell or third-party controllers alongside PROFINET communication.

What motors and gearboxes can it drive?

The 6SL3520-0XH07-5AB0 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 FSC frame?

FSC is the largest SINAMICS G115D frame at 425 × 240 × 169 mm, characterized by an integrated cooling fan that dissipates heat from the 7.5 kW power stage. While FSA and fanless FSB variants rely on natural convection through the IP65-sealed aluminum housing, FSC active cooling sustains continuous 5.5–7.5 kW operation without derating up to 40 °C ambient. The built-in EMC filter meets Category C2 (EN 61800-3) for industrial environments, and the integrated braking resistor handles regenerative energy from frequent deceleration cycles on incline conveyors.

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 (e.g., 6SL3520-0XE47-5AF0), 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.