SIEMENS 6SL3120-2TE21-0AA4 Double Motor Module – SINAMICS S120 Series
When a SINAMICS S120 Double Motor Module fails on the production floor, the consequences are immediate and severe: servo axes lose synchronization, CNC machining centers halt mid-cycle, and automated assembly lines grind to a standstill. Every minute of unplanned downtime translates directly into scrapped workpieces, missed delivery windows, and escalating maintenance costs. The SIEMENS 6SL3120-2TE21-0AA4 is the precision-engineered replacement that restores full drive functionality without compromise.
Within the SINAMICS S120 booksize drive family, the 6SL3120-2TE21-0AA4 occupies a critical mid-range position — a dual-axis motor module capable of independently controlling two servo or induction motors from a single booksize slot. Its compact booksize form factor and shared DC bus architecture make it the preferred choice for multi-axis machine tools, packaging machinery, and high-throughput robotics cells worldwide. As part of Siemens’ globally standardized SINAMICS S120 platform, this module is deployed across automotive, aerospace, food & beverage, and semiconductor manufacturing facilities on every continent.
Technical Specifications
- Part Number / SKU: 6SL3120-2TE21-0AA4
- Series: SINAMICS S120 Booksize
- Module Type: Double Motor Module (Dual-Axis)
- Manufacturer: Siemens AG
- Form Factor: Booksize (rail-mounted, shared DC bus)
- Output Current per Axis: 10 A (continuous) — per Siemens SINAMICS S120 catalog
- DC Bus Voltage: Compatible with SINAMICS S120 standard DC bus range
- Cooling: Internal fan / forced air (booksize standard)
- Communication Interface: DRIVE-CLiQ
- Safety Functions: STO (Safe Torque Off) integrated
- Degree of Protection: IP20
- Operating Temperature: 0 °C to +40 °C (derating above 40 °C)
- Standards: CE, UL, cUL
Note: Always verify specifications against the official Siemens SINAMICS S120 hardware installation manual for your specific application.
Key Features & Benefits
- Dual-Axis Control: Independently controls two motor axes from a single module, reducing cabinet footprint and wiring complexity.
- DRIVE-CLiQ Integration: Plug-and-play digital communication with SINAMICS S120 Control Units (CU320-2, CU310-2) for automatic parameter upload and diagnostics.
- Shared DC Bus Architecture: Energy regenerated by decelerating axes is instantly available to accelerating axes, improving overall system energy efficiency.
- Integrated STO Safety: Meets SIL 2 / PLd safety requirements without external safety relays, simplifying machine safety certification.
- Compact Booksize Design: Optimized for high-density multi-axis installations in space-constrained control cabinets.
- Broad Motor Compatibility: Supports Siemens 1FK7, 1FT7, 1PH8 servo and induction motors, as well as third-party motors with encoder feedback.
Industry & Equipment Applications
- Machine Tools: CNC machining centers, turning centers, grinding machines requiring synchronized multi-axis motion.
- Packaging Machinery: High-speed form-fill-seal machines, cartoners, and palletizers with coordinated servo axes.
- Automotive Manufacturing: Welding robots, transfer lines, and press automation requiring precise torque control.
- Printing & Converting: Web tension control, register control, and slitter-rewinder applications.
- Semiconductor & Electronics: Pick-and-place equipment and wafer handling systems demanding sub-micron positioning accuracy.
- Food & Beverage: Hygienic filling lines and conveyors with washdown-compatible drive cabinets.
System Integration & Compatible Parts
- Control Units: SINAMICS S120 CU320-2 DP / CU320-2 PN, CU310-2 DP / CU310-2 PN
- Line Modules: SINAMICS S120 Active Line Module / Smart Line Module (booksize)
- Related Motor Modules: 6SL3120-1TE21-0AA4 (Single Motor Module), 6SL3120-2TE26-0AA4 (higher current double module)
- Encoder Systems: SMC10, SMC20, SMC30 Sensor Module Cabinet-Mounted
- Cables: MOTION-CONNECT 500 / 800 power and signal cables
- Spare Parts: 6SL3120-2TE21-0AA4 fan unit, DC bus connector kit
Our Quality Assurance Process
- Source Verification: All units are sourced from authorized distributors or directly from Siemens-certified supply chains.
- Visual & Functional Inspection: Each module undergoes visual inspection for physical damage, label authenticity, and connector integrity before dispatch.
- Serialization Check: Serial numbers are cross-referenced against manufacturer databases where applicable to confirm authenticity.
- Secure Packaging: Anti-static packaging with shock-absorbing foam inserts protects modules during international transit.
- Documentation: Original manufacturer documentation and test records provided upon request.
How to Order
- Submit your inquiry via the Contact Us form or email [email protected] with your required quantity and delivery timeline.
- Receive a formal quotation within 24 business hours including unit price, lead time, and shipping options.
- Confirm the purchase order — we accept T/T bank transfer and other B2B payment methods.
- Module is inspected, packaged, and dispatched with full tracking information provided.
- Post-delivery technical support available for installation and commissioning queries.
Why Choose Konmask.com?
- Industrial Automation Specialists: Focused exclusively on PLC, DCS, servo drives, and automation components — not a generalist marketplace.
- Global B2B Supply: Serving OEMs, system integrators, and MRO procurement teams across Europe, Southeast Asia, the Middle East, and the Americas.
- Fast Quotation Response: Dedicated sales engineers respond to RFQs within 24 hours.
- Competitive Pricing: Direct sourcing relationships enable competitive pricing on both new and refurbished units.
- Reliable Logistics: DHL, FedEx, and UPS express options with full export documentation support.
Frequently Asked Questions
- Q: Is the 6SL3120-2TE21-0AA4 a new or refurbished unit?
- A: We supply both new original and professionally refurbished units. Please specify your preference when submitting your inquiry and we will confirm availability and pricing accordingly.
- Q: Can this module replace a 6SL3120-2TE21-0AB3 or similar variant?
- A: Hardware variants may differ in firmware version or accessory configuration. Please share your existing module’s full nameplate data so our engineers can confirm compatibility before ordering.
- Q: What is the typical lead time?
- A: In-stock units ship within 3–5 business days. For sourced units, lead time is typically 2–4 weeks depending on global availability. We will confirm exact lead time in your quotation.
- Q: Do you provide a warranty?
- A: Yes. All units come with a minimum 90-day warranty against manufacturing defects. Extended warranty options are available — please inquire.
- Q: Can you assist with SINAMICS S120 commissioning?
- A: Our technical team can provide guidance on STARTER / TIA Portal commissioning parameters. For on-site support, we can recommend certified Siemens service partners in your region.
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