Siemens 6SL3121-1TE31-3AA3 SINAMICS S120 Single Motor Module
A high-current external-cooling module for one coordinated SINAMICS S120 motor axis.
Technical Summary
6SL3121-1TE31-3AA3 is a booksize Single Motor Module for demanding single-axis S120 applications. It works from the shared DC-link architecture and provides a controlled three-phase motor connection. The large external-cooling format, DRIVE-CLiQ link and extended safety support require system-level verification during service replacement.
Specifications
| Manufacturer | Siemens |
|---|---|
| Order Number | 6SL3121-1TE31-3AA3 |
| DC Input Class | 600 V DC |
| Motor Output | 400 V, 3 AC |
| Rated Output Current | 132 A |
| Construction | Booksize |
| Cooling | External air cooling |
| System Interface | DRIVE-CLiQ cable included |
| Safety Capability | Extended Safety Integrated functions supported |
| Product Lifecycle | Product cancellation |
Features
- Supplies one high-current motor axis from the coordinated S120 drive line-up.
- Keeps power conversion and control communication within the modular DRIVE-CLiQ architecture.
- Uses an intensified external cooling route intended for the matching cabinet design.
- Supports optimized pulse patterns of the documented motor-module generation.
- Provides the power-stage basis for safety functions engineered in the associated control project.
Compatibility
- Verify the TE31 current class and AA3 hardware suffix together.
- Confirm cabinet space, airflow opening and power-terminal access from the original drawings.
- Review DC-link capacity and upstream line-module sizing for the installed axis.
- Retain the approved motor cable, protective-earth and shielding arrangement.
- Check firmware and Safety Integrated dependencies before accepting a replacement configuration.
Replacement
- The official Siemens record identifies this product in the cancellation lifecycle.
- Plan lifting and access procedures appropriate to the installed high-current module location.
- Archive drive parameters and capture the existing DRIVE-CLiQ topology.
- Re-torque power and earth connections according to the approved service procedure.
- Complete loaded-current, thermal and safety validation before production release.
FAQ
Which identity elements prevent confusion with adjacent S120 modules?
Use the complete TE31-3AA3 order number together with the external-cooling construction.
Why is cabinet access part of replacement planning?
The high-current booksize unit requires adequate space for removal, power connections and the external airflow interface.
Which upstream component should be reviewed?
Confirm that the installed line module and common DC link remain suitable for the axis configuration.
What drive information should be captured first?
Save the project archive, topology, motor and encoder data, and validated safety settings.
Does cancellation change the need for compatibility review?
No. Lifecycle status increases the importance of checking the exact hardware and complete system dependencies.
What should a post-installation load test cover?
Observe drive diagnostics, output behavior, connection temperature and required safety functions under the approved test plan.
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