Siemens 6SL3120-2TE21-8AC0 is a high-performance SINAMICS S120 Double Motor Module designed for demanding multi-axis motion applications. As an experienced industrial automation supplier, Yueyang Tongtu provides new and original Siemens automation components, including this dual-axis motor module, with technical selection support for CNC machines, packaging systems, robotics, and other precision equipment.
With a 600 V DC input, two 400 V AC motor outputs rated at 18 A per axis, compact booksize construction, internal air cooling, DRIVE-CLiQ communication, and extended Safety Integrated functions, this module combines space efficiency, synchronized motion control, and machine safety in one compact solution.
The Siemens 6SL3120-2TE21-8AC0 is a SINAMICS S120 Double Motor Module in booksize C-type construction with internal air cooling. According to Siemens product documentation, the module has a 600 V DC input and two 400 V three-phase motor outputs, each rated at 18 A.
Its dual-axis architecture allows one module to control two servo motors. Compared with installing two individual motor modules, this configuration can reduce cabinet width, simplify DC-link connections, and reduce wiring requirements.
The module also supports extended Safety Integrated functions and DRIVE-CLiQ communication. These features make it suitable for applications requiring coordinated movement between multiple axes, rapid response, and integrated machine safety.
For buyers who need the original product specifications, the Siemens official website and Siemens Industry Mall should be used as primary technical references.
Understanding the electrical and mechanical specifications is essential when selecting a motor module for a new machine or replacing an existing unit.
| Parameter | Specification |
|---|---|
| Article Number | 6SL3120-2TE21-8AC0 |
| Product Family | SINAMICS S120 Double Motor Module |
| Construction | Booksize C Type |
| DC Link Voltage | 510–720 V DC system range |
| Motor Output | 400 V 3 AC |
| Rated Current | 18 A per axis |
| Peak Current | Up to 36 A per axis under applicable conditions |
| Cooling | Internal air cooling |
| Protection | IP20 / UL open type |
| Communication | DRIVE-CLiQ |
| Safety | Extended Safety Integrated functions |
| Dimensions | Approx. 100 × 380 × 270 mm |
| Net Weight | Approx. 7.7 kg |
Siemens documentation specifies the 6SL3120-2TE21-8AC0 as a Double Motor Module with 18 A/18 A output capability. The official data sheet also identifies CE and cULus compliance and Safety Integrated capabilities including SIL 2 according to IEC 61508 and PL d according to EN ISO 13849-1 under the applicable conditions.
The most obvious advantage is its ability to control two motors through one compact module. For machine builders working with limited cabinet space, this can simplify the overall electrical layout and increase installation efficiency.
DRIVE-CLiQ provides high-speed communication between the drive components and control system. This makes the module suitable for coordinated functions such as electronic gearing, electronic camming, master-slave following, and multi-axis interpolation.
Safety Integrated functionality can help machine designers implement safety-related motion functions within the drive architecture. Depending on the system configuration and validated safety design, this can reduce the need for additional external safety hardware.
The internal air-cooling design helps dissipate heat generated during operation. Proper cabinet ventilation and adherence to Siemens installation requirements remain essential for maintaining long-term reliability.
The module can be integrated into SINAMICS S120 systems supporting suitable Siemens synchronous servo and asynchronous motor configurations. This flexibility makes it useful for different machine architectures.
The Siemens 6SL3120-2TE21-8AC0 is particularly valuable in machines where two coordinated axes must operate accurately and repeatedly.
For example, a compact machining center can use the dual-axis module for X/Y linear servo control while another module handles the spindle axis. This arrangement can reduce cabinet space while providing the coordinated movement required for precision machining.
A major benefit of the SINAMICS S120 architecture is that the motor module is not normally used as an isolated component. It forms part of a larger drive system involving control units, power modules, motors, encoders, and communication components.
The 6SL3120-2TE21-8AC0 can work within suitable SINAMICS S120 configurations and communicate through DRIVE-CLiQ. This architecture helps engineers establish a centralized motion-control environment in which drive parameters, diagnostics, and system information can be managed more efficiently.
For machine builders, the result can be a cleaner system architecture with fewer separate components, simplified wiring, and easier troubleshooting.
Correct maintenance is important for maintaining stable operation and extending the service life of industrial drive equipment.
Environmental conditions should always be evaluated against the official Siemens specifications. Users should not rely solely on general temperature or altitude assumptions when designing a production machine.
When sourcing a Siemens 6SL3120-2TE21-8AC0, purchasing teams should verify more than the model number. A reliable procurement process should include the following checks:
Yueyang Tongtu focuses on industrial automation components and offers Siemens drive products for international procurement. Its product information indicates availability of new and original components together with selection, wiring, parameter, and commissioning support.
It is a SINAMICS S120 Double Motor Module designed to control two motors in industrial motion-control systems. Typical applications include CNC machines, packaging equipment, printing machinery, gantry systems, and other precision automation equipment.
The module is a dual motor module and provides two independently controlled motor axes. Each axis has a rated output current of 18 A under the applicable operating conditions.
Yes. Siemens documentation identifies support for extended Safety Integrated functions. The applicable safety functions and performance level must be evaluated according to the complete machine safety design and Siemens technical documentation.
The module uses DRIVE-CLiQ, Siemens' high-speed drive communication technology, for integration with compatible control and drive components.
Yes. Its dual-axis architecture and synchronized motion capabilities make it suitable for CNC and other precision motion applications when the electrical ratings, motor configuration, controller, and overall system requirements are properly matched.
Industrial buyers can source this model through qualified Siemens automation distributors and specialized industrial automation suppliers. When purchasing, confirm the exact article number, product condition, authenticity, documentation, and after-sales technical support.
The Siemens 6SL3120-2TE21-8AC0 combines dual-axis motor control, compact booksize construction, 18 A rated output per axis, DRIVE-CLiQ communication, internal air cooling, and integrated safety capabilities in a solution designed for demanding industrial motion systems. For CNC, packaging, printing, robotics, battery manufacturing, and other precision automation applications, its compact architecture can help engineers optimize cabinet space while maintaining coordinated motion performance.
If you are looking for a reliable China supplier for Siemens 6SL3120-2TE21-8AC0 or need help verifying specifications, compatibility, stock status, and system configuration, Yueyang Tongtu can provide professional sourcing and technical assistance. Contact us today to discuss your automation requirements and obtain product information, availability, and a suitable quotation for your project.
