Siemens 6SL3320-1TE33-1AA3 Single Motor Module – SINAMICS S120

Siemens 6SL3320-1TE33-1AA3 — 310 A Booksize Single Motor Module for SINAMICS S120 Multi-Axis Drive Systems

The 6SL3320-1TE33-1AA3 is a high-current Single Motor Module within the Siemens SINAMICS S120 Booksize format family. It delivers a continuous output current of 310 A at a DC link voltage of 600 V DC, making it the appropriate selection for high-torque servo axes, spindle drives, and heavy-duty positioning applications where axis-level power density and deterministic torque response are non-negotiable. The module operates as a subordinate power stage within the SINAMICS S120 shared DC bus architecture, receiving its DC link supply from an upstream Line Module (Active Line Module or Smart Line Module) and executing torque and speed commands issued by a CU320-2 series Control Unit via the DRIVE-CLiQ topology.

In a multi-axis cabinet, the 6SL3320-1TE33-1AA3 occupies a defined Booksize slot and connects to adjacent modules through the integrated DC bus bar system, eliminating the need for discrete DC link cabling between power stages. This mechanical and electrical integration reduces cabinet footprint, simplifies thermal management planning, and shortens commissioning time when using Siemens SINAMICS Startdrive or STARTER software with automatic topology recognition.

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Technical Parameters

Hardware Logical Analysis

The 6SL3320-1TE33-1AA3 is built around a three-phase IGBT inverter bridge rated for the 600 V DC bus. The gate driver stage employs isolated gate drive circuits per IGBT pair, with desaturation detection logic that triggers a controlled shutdown within microseconds of a short-circuit event — a critical protection mechanism when driving low-impedance servo motors at high switching frequencies.

DC Bus Integration: The Booksize mechanical format uses a rigid copper bus bar system that spans the width of the cabinet assembly. The 6SL3320-1TE33-1AA3 connects to this bus bar via spring-loaded contacts, ensuring low-resistance, vibration-tolerant electrical continuity without bolted joints that can loosen under thermal cycling. The shared DC bus allows regenerative energy from decelerating axes to be consumed by accelerating axes within the same cabinet, reducing net energy draw from the supply and lowering thermal load on the Line Module.

DRIVE-CLiQ Topology and Cyclic Data Exchange: DRIVE-CLiQ is Siemens’ proprietary serial interface operating at 100 Mbit/s full-duplex over standard CAT5e cabling. The 6SL3320-1TE33-1AA3 participates in the isochronous DRIVE-CLiQ cycle managed by the CU320-2 Control Unit. Each cycle — configurable at 125 µs, 250 µs, or 500 µs — carries setpoint data (torque reference, speed reference) downstream and actual-value data (phase currents, DC link voltage, module temperature, fault status) upstream. This deterministic exchange eliminates polling latency and allows the Control Unit to execute closed-loop current regulation at the full servo cycle rate.

EMC Design: The module’s internal layout separates the high-frequency switching section from the DRIVE-CLiQ signal processing board using a grounded metal partition. All signal cables within the module are routed orthogonally to power conductors. The motor output terminals include integrated common-mode choke structures that suppress high-frequency leakage currents, reducing conducted emissions on the motor cable and protecting encoder electronics from capacitively coupled interference — a measurable benefit when operating at 4 kHz or 8 kHz switching frequencies with long motor cables.

Thermal Management: An internal axial fan draws air through the heatsink fins mounted on the IGBT modules. A temperature sensor embedded in the heatsink feeds real-time thermal data to the Control Unit via DRIVE-CLiQ. The firmware implements a two-stage thermal derating algorithm: at 80 °C heatsink temperature, output current is linearly reduced; at 95 °C, a controlled fault shutdown is initiated. This prevents thermal runaway without requiring external thermal monitoring hardware.

System Integration Benefits

• Isochronous servo cycle synchronization: The module locks to the CU320-2 servo clock, enabling multi-axis coordinated motion with axis-to-axis jitter below 1 µs — essential for gantry, cross-cutter, and electronic cam applications.
• Automatic topology recognition: On power-up, SINAMICS Startdrive reads the DRIVE-CLiQ node addresses of all connected modules, including the 6SL3320-1TE33-1AA3, and populates the drive object tree without manual configuration of node IDs.
• Integrated current measurement: Hall-effect current sensors on each output phase provide actual current feedback directly to the module’s DSP, enabling field-oriented control (FOC) without external current transducers.
• Onboard diagnostics transparency: The module continuously reports DC link voltage, output current per phase, heatsink temperature, fan speed, and IGBT junction temperature estimates via DRIVE-CLiQ. All parameters are accessible in real time through the Control Unit’s parameter set (r-parameters) and can be mapped to PROFIdrive telegrams for SCADA visibility.
• Safe Torque Off (STO) support: The module implements STO (SIL 2 / PLd per IEC 62061 / ISO 13849-1) via dedicated 24 V digital inputs, allowing the motor to be de-energized without removing DC bus power — enabling fast restart after a safety stop without the thermal stress of a full power cycle.
• Scalable switching frequency: Switching frequency can be set to 2, 4, or 8 kHz via parameter p1800. Higher switching frequencies reduce motor current ripple and acoustic noise at the cost of increased IGBT switching losses; the module’s thermal model automatically adjusts the current derating curve accordingly.
• Shared DC bus energy recovery: Regenerative braking energy from the axis driven by this module is fed back to the DC bus and consumed by other motoring axes in the same cabinet, reducing the required Line Module rating and lowering energy consumption in duty cycles with frequent acceleration/deceleration.
• Firmware-level fault memory: The module stores the last 8 fault events with timestamps, fault codes, and associated parameter snapshots in non-volatile memory. This fault buffer is readable via STARTER or Startdrive without requiring a live connection to the Control Unit, simplifying post-incident analysis in field service scenarios.

Quality Assurance & Global Logistics

Every 6SL3320-1TE33-1AA3 unit dispatched from our Xiamen, China facility is a genuine Siemens-manufactured component. Siemens produces SINAMICS S120 Booksize modules at its Nuremberg and Erlangen facilities under ISO 9001 certified quality management systems. Each module carries a unique serial number traceable through Siemens’ product lifecycle database.

Before dispatch, our technical team performs the following verification steps: visual inspection of the housing, label, and connector integrity; DRIVE-CLiQ communication check confirming the module responds with its correct firmware version and serial number; and DC bus insulation resistance measurement. Units that do not pass all checks are quarantined and not shipped.

Logistics from Xiamen operate via DHL Express, FedEx International Priority, and UPS Worldwide Expedited. Standard dispatch lead time is 1–3 business days after payment confirmation. Full export documentation is provided: commercial invoice, packing list, certificate of origin, and HS Code 8504.40 customs declaration. For orders requiring air freight insurance or specific incoterms (CIF, DAP, EXW), please specify at the time of inquiry. We have shipped to customers in Germany, the United States, South Korea, India, Brazil, and across Southeast Asia.

A 12-month warranty covers all units against manufacturing defects and functional failure under normal operating conditions. Warranty claims are processed within 5 business days of receipt of the returned unit.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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