The 6SL3520-0XH67-5AF0 sits at the top of the SINAMICS G115D power range — a 7.5 kW distributed wall-mounted frequency converter in the FSC frame with a 17.1 A rated output. This is the drive for the heaviest conveyor sections in a decentralized automation architecture: high-throughput merge lines, incline conveyors moving dense goods, pallet handling stations, and long belt sections where the mechanical load demands the full 7.5 kW. The FSC frame measures 425 mm wide, 240 mm high, and 169 mm deep — larger than the FSA and FSB frames to accommodate the integrated cooling fan and brake chopper, while retaining the same IP65 / IP66 / UL Type 4X enclosure integrity.

What makes the FSC frame different from FSA and FSB?

The FSC frame is the largest of the three G115D wall-mounted enclosures, covering 5.5 kW and 7.5 kW. The key differences from the smaller FSA (0.37–1.5 kW) and FSB (2.2–4 kW) frames are the integrated forced-air cooling fan, the built-in brake chopper for dynamic braking resistor connection, and the higher current-carrying capacity of the power stage. The integrated fan is thermally governed — it runs only when the heatsink temperature demands it, keeping acoustic noise low during partial-load operation. The brake chopper allows connection of an external braking resistor (minimum 40 Ω for FSC) to dissipate regenerative energy from decelerating high-inertia loads, which is essential for incline conveyors and high-speed indexing applications.

Where does distributed mounting deliver the most value at 7.5 kW?

The cost case for distributed drives strengthens with power. At 7.5 kW, a traditional centralized VFD installation requires a ventilated cabinet, a circuit breaker or fuse disconnector, a mains contactor, shielded motor cables sized for the full load current over potentially long runs, and the cabinet real estate to house it all. The G115D replaces this with a wall-mounted unit that bolts directly to the machine frame next to the motor, connected by a cable under 15 m. The savings in cabinet space, cable copper, installation labor, and voltage-reflection mitigation make the distributed architecture most financially compelling at the high end of the power range — exactly where the 7.5 kW FSC sits.

Frequently Asked Questions

What is the difference between the AF0, AB0, and AA0 I/O variants on the 7.5 kW model?

The suffix codes designate the I/O interface configuration — the type and arrangement of digital inputs, outputs, and communication connectors. The 7.5 kW rated power, 17.1 A output, 380–480 V supply range, 0–550 Hz frequency, FSC frame dimensions, and all safety and control features are identical across AF0, AB0, and AA0. The choice between suffixes is a field-wiring decision based on the specific I/O requirements of the installation. Confirm the terminal assignment in the G115D operating manual before ordering.

Does the 7.5 kW G115D support regenerative operation?

The G115D with integrated brake chopper supports controlled deceleration of high-inertia loads by dissipating regenerative energy through an external braking resistor. It does not support full regenerative line feedback — for applications requiring continuous regeneration (e.g., downhill conveyors, unwinders), a line-regenerative drive series such as the SINAMICS G120 with an Active Line Module would be required. For the vast majority of horizontal and incline conveyor applications, the brake chopper with a correctly sized resistor provides adequate braking capability.

Can multiple 7.5 kW G115D drives share a single PROFINET drop?

Each G115D is an individual PROFINET device with its own M12 network connector. Multiple drives connect to the PROFINET network via standard industrial Ethernet switches — there is no daisy-chaining through the drives themselves. TIA Portal discovers and commissions each drive individually. The shared infrastructure is the 24 V DC control power supply and the mains feeder circuit, which can serve multiple G115D units on the same conveyor line with appropriate branch-circuit protection for each drive.