The Siemens SINAMICS G115D 6SL3520-0XL00-3AF0 is a 0.37 kW wall-mounted distributed frequency converter for decentralized conveyor drive applications. With integrated PROFINET and EtherNet/IP dual-protocol support, it connects directly to both Siemens SIMATIC and third-party automation systems without additional gateways. The IP65/IP66-rated enclosure mounts directly on the machine frame, eliminating the need for a control cabinet.

Which Communication Protocols Are Supported?

This -3AF0 variant integrates both PROFINET IO and EtherNet/IP natively, selectable via parameterization. Unlike the -3AB0 (PROFINET only) or -3AA0 (basic I/O terminal control) variants, the dual-protocol design allows a single drive platform to serve mixed-automation environments. Integrated STO (Safe Torque Off) is available via fail-safe digital input (F-DI) or PROFIsafe over PROFINET, achieving SIL 2 / PL d.

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 operate without a fieldbus connection?

Yes. The -3AF0 variant supports standard digital and analog I/O terminal control in addition to fieldbus communication. However, if fieldbus communication is not required, the -3AA0 variant offers the same power rating without the Ethernet interface at a lower cost.

What is the difference between FSA and larger G115D frames?

The FSA frame covers 0.37 kW to 0.75 kW with natural convection cooling and compact 380 × 216 × 129 mm dimensions. FSB and FSC frames extend to 4 kW and 7.5 kW respectively with forced-air cooling and larger 425 × 240 × 169 mm dimensions. Choose FSA for space-constrained small conveyor sections.