The Siemens SINAMICS G115D 6SL3520-0XL00-3AA0 is a 0.37 kW wall-mounted distributed frequency converter with digital and analog I/O terminal control, designed for straightforward conveyor speed regulation without a fieldbus network. The IP65/IP66-rated FSA enclosure mounts directly on the machine frame, eliminating control cabinet space and cooling infrastructure for basic decentralized drive applications.

How Is the Drive Controlled Without a Fieldbus?

This -3AA0 variant uses onboard digital inputs for start/stop, direction, and fixed-speed selection, plus an analog input (0–10 V or 4–20 mA) for speed reference. Digital outputs provide status feedback such as running, fault, and speed reached. This terminal-based control is ideal for simple conveyor sections that do not require networked automation. For PROFINET integration, choose the -3AB0 variant; for both PROFINET and EtherNet/IP, choose the -3AF0.

What Are the Installation Requirements?

The FSA frame measures 380 × 216 × 129 mm (W×H×D) and mounts directly on the machine frame or wall. The IP65/IP66/UL Type 4X enclosure withstands washdown and dusty environments without a cabinet. The operating ambient temperature range is −30 °C to +40 °C, extendable to +55 °C with derating. Natural convection cooling requires no fan maintenance. The integrated Category C2 EMC filter ensures compliance with IEC 61800-3 without external filtering.

Motor Compatibility and Control

The drive is optimized for SIMOGEAR 2KJ8 geared motors with IE3 asynchronous or IE4 synchronous reluctance motors. Control modes range from simple V/f for basic speed regulation to encoderless vector control for applications requiring precise torque at low speeds. The integrated brake chopper (180 V DC) manages motor holding brakes directly. Overload capability reaches 200% for 3 seconds, supporting conveyor start-up surges.

Frequently Asked Questions

Can this drive be upgraded to fieldbus control later?

No. The communication interface is determined at the hardware level during manufacture. If fieldbus control may be required in the future, select the -3AB0 (PROFINET) or -3AF0 (PROFINET and EtherNet/IP) variant at the time of purchase. The -3AA0 is intended for applications where terminal I/O control is permanently sufficient.

Does this variant still include STO safety functionality?

Yes. Safe Torque Off (STO) is available via the fail-safe digital input (F-DI) on all G115D variants, including the -3AA0. The F-DI accepts a 24 V DC safety signal from an external safety relay or safety PLC output. PROFIsafe over PROFINET is not available on this variant since there is no PROFINET interface.