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🔍 What are SINAMICS S120 Motor Modules 🔍

Motor Modules are inverter modules dedicated to the direct control of motors.
Their main functions are:

• converting the DC voltage of the DC link

• generating a controlled AC voltage

• regulating motor torque, speed, and position

They are designed for applications where precision, fast response, and stability are essential requirements.

⚙️ Main Product Roots – S120 Motor Modules ⚙️

The SINAMICS S120 – Motor Modules family includes the following main roots:

6SL335x series

👉 6SL3350 → Standard Motor Module for single-axis applications
👉 6SL3351 → Optimized version for dynamic loads
👉 6SL3352 → Motor Module with increased current capacity
👉 6SL3353 → Module for continuous industrial applications
👉 6SL3355 → Variant for medium-to-high power motors
👉 6SL3356 → Motor Module for fast cycles and high dynamics
👉 6SL3357 → Rugged version for harsh industrial environments

6SL336x series

👉 6SL3362 → Advanced Motor Module for multi-axis systems
👉 6SL3363 → High-performance module for critical applications

These roots identify functional families from which many MLFB variants are derived and used across different industrial sectors.

⚡ Common Features of SINAMICS S120 Motor Modules ⚡

All S120 series Motor Modules ensure:

🎯 Precise torque and speed control
⚡ High dynamics and reduced response times
🔁 Efficient DC link management
🧠 Native integration with S120 Control Units
🔐 Safety Integrated support
🌐 Compatibility with PROFINET / PROFIBUS
🧩 Modular and scalable architecture

These features make them ideal for complex, highly automated systems.

🏭 Typical Applications

SINAMICS S120 Motor Modules are used in:

• CNC machine tools

• multi-axis production lines

• industrial robots

• high-speed packaging

• material handling systems

• extrusion and converting

• high-precision special machines

In many plants, multiple Motor Modules are controlled by the same Control Unit, optimizing space, costs, and performance.

💡 Why S120 Motor Modules Are Essential 💡

• enable maximum configuration flexibility

• support both single-axis and multi-axis architectures

• ensure long-term process stability

• are designed for continuous operation over many years

• allow advanced retrofits without redesigning the entire system

For these reasons, they remain central to Siemens’ strategy for advanced motion control.

🔧 E-Repair Services for SINAMICS S120 – Motor Modules 🔧

E-Repair, the only Siemens Authorized Service Partner in Europe, provides full support for S120 Motor Modules:

🔧 Repair in a Siemens-certified in-house laboratory
♻️ Complete regeneration to “zero-hours” standard
⚡ Advance supply of regenerated modules for production emergencies
💾 Parameter backup and restoration
🧼 Professional technological cleaning
🩺 Fault diagnostics and preventive maintenance
🔐 Functional and safety testing

All processes comply with:

BS 8001:2017 (Circular Economy)
AFNOR XP X30-901:2018
ISO 14064-1 (Carbon Footprint – Scope 3)
E-Repair ESG guidelines

🚀 Conclusion 🚀

The SINAMICS S120 Motor Modules (6SL335x / 6SL336x) are key elements for high-performance motor control in Siemens systems.
Thanks to their modularity, reliability, and native integration, they continue to be a strategic choice for industrial production continuity.

With E-Repair’s support, it is possible to extend lifecycle, reduce downtime, and ensure technical and regulatory compliance even for complex or legacy systems.

🟢 Pillar Page article for the technical mapping of the SINAMICS S120 – Motor Modules series (roots 6SL3350 - 6SL3351 - 6SL3352 - 6SL3353 - 6SL3355 - 6SL3356 - 6SL3357 - 6SL3362 - 6SL3363)