Siemens SINAMICS S120 6SL3420-1TE21-8AA0 Single Motor Module

Product Overview

The Siemens 6SL3420-1TE21-8AA0 (6SL34201TE218AA0) is a high-precision SINAMICS S120 Single Motor Module designed for sophisticated multi-axis motion control applications. Built in the Booksize Compact format, this module is specifically engineered to maximize cabinet space efficiency without compromising power density. It operates on a 600V DC bus and provides a precision 18A 3-phase AC output to drive synchronous or induction motors. With integrated support for higher-order safety functions and optimized pulse patterns, the 6SL3420-1TE21-8AA0 ensures smooth motor operation and reduced thermal losses. The inclusion of the DRIVE-CLiQ interface facilitates high-speed digital communication of configuration and diagnostic data, making it an essential component for high-dynamic applications in packaging, printing, and CNC machining.

Technical Configuration

The 6SL3420-1TE21-8AA0 represents the pinnacle of Siemens' modular drive technology, focusing on rapid integration and functional safety.

• Booksize Compact Design: Optimized width and height allow for extremely dense mounting in control cabinets, ideal for machines with high axis counts.

• DRIVE-CLiQ Integration: Uses the standardized Siemens digital interface to automatically detect motor parameters and encoder data, significantly reducing commissioning time.

• Advanced Safety Functions: Supports integrated safety features (such as STO and SS1), enabling the drive to participate in complex safety-instrumented systems.

• Internal Air Cooling: Features a robust internal fan system designed to maintain stable operating temperatures during high-duty cycles.

• Optimized Pulse Patterns: Advanced PWM algorithms reduce motor harmonics and audible noise while increasing the overall energy efficiency of the drive train.

Technical Specifications

Technical FAQs

What is the benefit of the DRIVE-CLiQ cable included with this module?

The DRIVE-CLiQ cable provides the digital backbone for the drive system. It transmits encoder signals, motor temperature data, and electronic nameplate information back to the Control Unit (CU), ensuring error-free configuration and rapid component replacement.

Is this module compatible with standard SINAMICS S120 Control Units?

Yes, it is designed to be controlled by CU310-2 or CU320-2 Control Units via the DRIVE-CLiQ network. Note that the firmware version of the Control Unit must support the Booksize Compact hardware profile.

What should I do if the module indicates a "DC Link Overvoltage" fault?

Check the regenerative energy profile of the motor. Since this is a Motor Module, it relies on the Infeed Module (ALM or SLM) to manage the DC bus voltage. If the energy cannot be returned to the grid or dissipated by a braking resistor in the DC link, an overvoltage trip will occur.

Engineering & Installation Guide

• DC Link Busbar Assembly: When mounting the 6SL3420-1TE21-8AA0 into an S120 lineup, ensure the DC link busbars and 24V busbars are correctly aligned and the screws are torqued to the Siemens specification (typically 1.8 Nm for Booksize Compact units). Poor contact on the 600V DC bus can lead to localized heating and catastrophic module failure.

• DRIVE-CLiQ Topology: Always follow the recommended topology rules for DRIVE-CLiQ. Avoid creating loops in the network. For 18A compact modules, ensure the cable is routed away from high-current motor leads to prevent data telegram corruption, despite the digital nature of the interface.

• Thermal Spacing: Although designed for compact side-by-side mounting, ensure that the air intake at the bottom and the exhaust at the top are not obstructed by wiring ducts. A minimum clearance of 80 mm above and below the module is required for the internal fan to provide effective cooling under full load.