Siemens 6SL3210-1KE18-8AF1 – SINAMICS S120 Power Module Inverter Drive | 18.5kW 3AC 380–480V
Engineering Background
The Siemens SINAMICS S120 series represents the pinnacle of modular drive engineering for demanding industrial applications. Designed for multi-axis coordinated motion and single-axis high-performance drives, the S120 platform integrates seamlessly into TIA Portal and PROFINET/PROFIBUS ecosystems, making it the preferred choice for OEMs and system integrators worldwide.
Product Positioning
The 6SL3210-1KE18-8AF1 is a booksize format Power Module rated at 18.5 kW for 3-phase AC input (380–480 V). It is engineered for servo and vector control applications requiring precise torque and speed regulation, with a compact footprint suitable for cabinet-integrated installations. This unit is sourced, inspected, and verified by Konmask.com for B2B procurement engineers who demand traceability and reliability.
Complete Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 6SL3210-1KE18-8AF1 |
| Product Family | SINAMICS S120 Power Module |
| Form Factor | Booksize |
| Rated Output Power | 18.5 kW |
| Input Voltage | 3 AC 380–480 V (±10%) |
| Input Frequency | 47–63 Hz |
| Output Current (Rated) | 38 A |
| Output Current (Peak) | 76 A (3 s) |
| DC Link Voltage | 510–720 V DC |
| Cooling Method | Forced air cooling (internal fan) |
| Protection Class | IP20 |
| Ambient Temperature | 0 °C to +40 °C (derated to +55 °C) |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | ≤ 95% (non-condensing) |
| Altitude | Up to 1000 m (derated above) |
| Control Interface | DRIVE-CLiQ |
| Communication | PROFINET / PROFIBUS (via CU) |
| Weight | Approx. 1.6 kg |
| Country of Origin | Germany |
| HS Code | 8504.40.1990 |
| CE / UL Certified | Yes |
Proven Application Environments
- CNC Machine Tools — Coordinated multi-axis spindle and feed drive control
- Packaging Machinery — High-dynamic servo positioning with regenerative braking
- Printing & Converting Lines — Tension control and register accuracy
- Textile & Winding Equipment — Torque-controlled winding with dancer roll feedback
- Conveyor & Material Handling — Variable speed drives with load sharing
- Pump & Fan Systems — Energy-saving V/f control with PID regulation
- Robotics & Handling — Integrated into SIMOTION D or S7-1500T motion controllers
Engineering Advantages
- DRIVE-CLiQ Interface — Single-cable connection for power, encoder, and diagnostics; eliminates wiring errors and enables automatic motor identification
- Modular Architecture — Shared DC bus topology allows energy exchange between axes, reducing peak demand and improving efficiency
- Integrated Safety — Supports STO (Safe Torque Off) and SS1 (Safe Stop 1) per IEC 62061 / ISO 13849 without external safety relays
- TIA Portal Integration — Full parameterization, diagnostics, and firmware update via STARTER or TIA Portal Startdrive
- High Overload Capacity — 200% peak current for 3 seconds enables rapid acceleration in servo applications
- Compact Booksize Format — Optimized for high-density cabinet layouts; side-by-side mounting without derating
System Architecture & Signal Flow
The 6SL3210-1KE18-8AF1 Power Module operates within the SINAMICS S120 modular system as follows:
- Line Module (ALM/SLM/BLM) → Rectifies 3-phase AC supply to regulated DC bus (510–720 V DC)
- DC Bus → Distributes power to all connected Power Modules; enables regenerative energy sharing
- 6SL3210-1KE18-8AF1 Power Module → Inverts DC bus to variable-frequency 3-phase AC output for motor control
- Control Unit (CU320-2 / CU310-2) → Executes vector/servo control algorithms; communicates via DRIVE-CLiQ to Power Module and motor encoder
- Motor (1FK7 / 1PH8 / 1FT7) → Receives controlled AC output; encoder feedback closes the speed/torque loop via DRIVE-CLiQ
Note: This listing covers the Power Module only. Line Module, Control Unit, and motor must be ordered separately per system design.
Sourcing & Quality Verification
- ✅ Genuine Siemens OEM Part — Sourced from authorized distribution channels and verified OEM surplus
- ✅ Pre-shipment Functional Test — DC bus charge, IGBT gate drive integrity, and DRIVE-CLiQ communication verified
- ✅ Firmware Version Check — Firmware version documented and available upon request
- ✅ Traceability — Serial number, date code, and factory of origin recorded for each unit
- ✅ ESD-Safe Packaging — Shipped in anti-static foam with moisture barrier bag and desiccant
- ✅ Certificate of Conformity — Available on request for regulated industries
Procurement Process
- Inquiry — Submit your BOM or part number via email to [email protected] or WhatsApp +0086 19859288691
- Quote & Lead Time — We confirm stock availability, unit price, and estimated delivery within 24 hours
- Order Confirmation — Purchase order or online checkout accepted; proforma invoice issued for wire transfer
- Quality Inspection — Unit inspected, photographed, and serial number recorded before dispatch
- Shipping — DHL Express / FedEx Priority with full tracking; export documentation (commercial invoice, packing list, COO) included
- After-Sales Support — 12-month warranty against manufacturing defects; technical support for integration queries
Technical FAQ
Q: Can this Power Module be used as a standalone inverter without a Line Module?
A: No. The 6SL3210-1KE18-8AF1 requires a DC bus supply from a compatible SINAMICS S120 Line Module (ALM, SLM, or BLM). It cannot be connected directly to AC mains.
Q: Which Control Unit is compatible?
A: Compatible with CU320-2 DP, CU320-2 PN, CU310-2 DP, and CU310-2 PN. The Control Unit connects via DRIVE-CLiQ port X200.
Q: What motors can be driven by this module?
A: Suitable for Siemens 1FK7, 1FT7, 1PH8 series motors and third-party motors with compatible encoder interfaces (HTL, TTL, EnDat, SSI, DRIVE-CLiQ).
Q: Is STO (Safe Torque Off) supported without an external safety relay?
A: Yes. STO is integrated and certified to SIL 2 / PLd when used with a compatible Control Unit and safety-rated wiring.
Q: What is the difference between 6SL3210-1KE18-8AF1 and 6SL3210-1KE21-3AF1?
A: The 1KE18-8 variant is rated 18.5 kW / 38 A; the 1KE21-3 variant is rated 22 kW / 45 A. Both are booksize format and share the same mechanical footprint but differ in IGBT rating and thermal management.
Q: Do you provide STEP 7 / TIA Portal project files?
A: We can provide GSD/GSDML files and standard drive parameter sets upon request. Custom commissioning support is available as a paid service.
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Contact: [email protected] | +0086 19859288691
