The Siemens 6SL3520-1XB07-5AF0 is the PROFINET/EtherNet/IP communication variant at the absolute highest power rating in the SINAMICS G115D wall-mounted distributed drive family — 7.5 kW (10 hp) in the FSC fan-cooled frame (425 × 180 × 169 mm, 7.85 kg). With 19 A rated output (High Overload), 380–480 V 3-phase supply, B-connector, and integrated PROFIsafe SIL 2 safety, it is the G115D power ceiling — the largest wall-mounted drive in the product line, for the heaviest conveyor sections: main trunk lines, high-speed merges, pallet lifts, and large incline conveyors.

What is the FSC frame?

FSC shares the same mechanical footprint as FSB fan-cooled (425 × 180 × 169 mm) but uses higher-rated IGBT power semiconductors to deliver 5.5–7.5 kW — roughly 330 g heavier than FSB fan-cooled (7.85 vs 7.52 kg) due to the more substantial power stage. The integrated fan is thermally controlled — it runs only when needed. 24 V DC control supply consumption is approximately 550 mA at full fan speed. The 1XB07 brings the B-connector to the FSC frame for the first time, completing the 1XB family's coverage from 0.37 kW FSA to 7.5 kW FSC — a single connector ecosystem across the entire G115D power range.

What motor types are supported?

The drive delivers 19 A rated output current with 200% overload — 38 A for 3 seconds. Supports IE3 asynchronous motors, IE4 synchronous reluctance motors, and SIMOGEAR geared motor combinations up to 7.5 kW. Control modes: V/f (0–550 Hz), V/f with FCC, sensorless vector control (0–240 Hz). Pulse frequency: 4–16 kHz. Integrated 180 V DC brake control. The integrated 2-port PROFINET switch supports daisy-chain line topology and MRP ring redundancy.

Frequently Asked Questions

How does the 1XB07 compare to the XH27 or 1XA07 at 7.5 kW?

Electrically identical — same 19 A rated / 38 A overload, same FSC frame (425 × 180 × 169 mm), same PROFINET stack with PROFIsafe. The difference is the connector: 1XB07 uses B-type, XH27/1XA07 use their respective catalog-specific connectors. Choose 1XB07 if your facility standardizes on B-connector cable sets. For new installations without an existing connector standard, any of the three will perform identically — availability and price are the deciding factors.

What is the 24 V DC power requirement at 7.5 kW?

The FSC fan-cooled frame draws approximately 550 mA from the 24 V DC control supply at full fan speed. When budgeting a control panel power supply for multiple FSC drives, use 600 mA per drive as a conservative allocation. The fan speed is thermally controlled — actual consumption varies with load and ambient temperature.

Is an external braking resistor required?

The integrated 180 V DC brake chopper handles an electromechanical motor brake directly. At 7.5 kW, an external braking resistor is strongly recommended for decline conveyors, high-inertia loads, or applications with frequent emergency stops. For horizontal conveyors with moderate stopping requirements, the internal brake management may suffice — consult the braking power calculations in the SINAMICS G115D operating instructions for your specific load profile.