The 6SL3520-0XN07-5AA0 is the 7.5 kW I/O Control G115D — the simplest communication option at the top of the wall-mounted power range. Rated at 19 A continuous (38 A overload) from a 380–480 V 3-phase supply, it uses digital and analog I/O for hardwired conveyor control. The drive that says: you can have 7.5 kW of machine-mounted, cabinet-free drive power without a fieldbus network.

Who chooses I/O Control at 7.5 kW — and why?

The AA0 I/O Control variant at 7.5 kW targets two specific scenarios. First, the retrofit: replacing a 7.5 kW cabinet-mounted drive with a distributed drive on the machine frame, where the existing control wiring (start/stop pushbuttons, speed potentiometer, fault indicator lamp) is already in place and the plant has no fieldbus infrastructure at the drive level. The G115D AA0 drops into this wiring environment without adding a network gateway. Second, the standalone machine: an OEM conveyor module shipped as a self-contained unit with its own local control station — the drive runs at a fixed speed or a few preset speeds, starts on a sensor trigger, and needs no remote diagnostics. Adding PROFINET to this application is overhead with no payback.

I/O signal set on the AA0 7.5 kW variant

The I/O Control interface provides digital inputs for start, stop, direction, and fixed-speed preset selection; digital outputs for fault and running status; and analog inputs (0–10 V or 4–20 mA) for speed reference. STO (Safe Torque Off) is wired to a dedicated fail-safe digital input (F-DI) — run twisted-pair from the safety relay or safety PLC output to this terminal. The terminal assignments and wiring diagrams are in the G115D operating instructions (document ID: 109827529 on Siemens Industry Online Support).

The power ceiling in context: 7.5 kW wire-and-run

At 7.5 kW / 38 A overload, this drive handles the heaviest conveyor segments where I/O control remains practical: main trunk conveyors, pallet lifts, and transfer cars in plants with a hardwired control philosophy. The FSC frame (425 × 180 × 169 mm, 7.85 kg) mounts directly on the machine — eliminating a 7.5 kW cabinet drive frees roughly 200 × 600 × 300 mm of cabinet space and the associated cooling load. The integrated fan requires 510–550 mA of 24 V DC in addition to the 3-phase 380–480 V power input. For conveyor systems with more than a handful of drives, the wiring complexity of I/O-only control grows faster than fieldbus — at some point, the cost of running individual analog and digital signal cables to each drive exceeds the cost of a PROFINET or AS-i infrastructure. The 7.5 kW AA0 is best deployed in single-drive or few-drive installations where that threshold has not been crossed.

Frequently Asked Questions

How do I set the speed on the I/O Control variant?

Speed reference is via a 0–10 V analog input (potentiometer or PLC analog output), 4–20 mA current loop, or fixed-speed digital input presets configured during commissioning. The drive ships with default parameter settings that can be adjusted via the SINAMICS Smart Access keypad or USB interface.

Can I use a remote keypad with this variant?

Yes — the SINAMICS Smart Access keypad connects locally for commissioning and parameter setup. For runtime operation, speed and start/stop are controlled through the I/O terminals; the keypad is not required after commissioning.

Is the I/O variant field-upgradable to PROFINET or AS-Interface?

No. The communication interface (AA0/AF0/AB0) is a factory-configured hardware variant. Field conversion is not supported. Select the communication variant at time of purchase based on the intended control architecture.