Multi-Axis Drive Control Solution – SIEMENS 6SL3351-6TE32-6AA3 | SINAMICS S120 CU320-2 DP
Where This Product Is Used
The SIEMENS 6SL3351-6TE32-6AA3 (CU320-2 DP) is a high-performance central control unit designed for coordinated multi-axis drive systems. It is widely deployed in the following industrial environments:
- Automotive Manufacturing Lines – Synchronizing servo axes on body-in-white welding stations, transfer presses, and assembly conveyors where sub-millisecond axis coordination is mandatory.
- Paper & Printing Machines – Maintaining precise tension and register control across multiple driven rolls and nip points in continuous-web processes.
- Metal Rolling Mills – Coordinating roughing and finishing stands with dynamic speed matching to prevent strip breaks and ensure gauge accuracy.
- Packaging & Filling Lines – Driving servo-controlled forming, filling, and sealing axes in high-speed VFFS and HFFS machines.
- Crane & Hoist Systems – Managing hoist, travel, and cross-travel drives with safe torque-off (STO) integration for overhead crane applications.
- Textile & Fiber Processing – Controlling winding, unwinding, and draw-roll axes in yarn spinning and weaving machinery.
- Machine Tool & CNC Centers – Serving as the drive-level controller for spindle and feed-axis drives in machining centers integrated with SINUMERIK CNCs.
Technical Specifications
| Part Number | 6SL3351-6TE32-6AA3 |
| Series | SINAMICS S120 |
| Module Type | Control Unit CU320-2 DP |
| Communication Interface | PROFIBUS DP (up to 12 Mbit/s) |
| Drive Objects Supported | Up to 6 drive objects (axes) |
| DRIVE-CLiQ Ports | 4 × DRIVE-CLiQ sockets |
| Digital Inputs | 12 × DI (24 V DC) |
| Digital Outputs | 8 × DO (24 V DC) |
| Power Supply | 24 V DC (external) |
| Memory Card Slot | CompactFlash (CF) card slot |
| Safety Functions | STO, SS1, SLS, SDI (via Safety Integrated) |
| Operating Temperature | 0 °C to +55 °C |
| Protection Rating | IP20 |
| Dimensions (W×H×D) | 73 mm × 380 mm × 270 mm |
| Weight | Approx. 5.0 kg |
| Firmware | STARTER / SINAMICS Startdrive compatible |
| Manufacturer | Siemens AG, Germany |
Why Engineers Specify This Model
- Centralized Multi-Axis Architecture – One CU320-2 DP manages up to 6 drive objects, reducing cabinet footprint and wiring complexity versus distributed single-axis solutions.
- PROFIBUS DP Native Integration – Seamless cyclic and acyclic communication with SIMATIC S7 PLCs, eliminating gateway hardware and reducing cycle-time jitter.
- DRIVE-CLiQ Topology – Automatic component recognition and parameterization of motors, encoders, and power modules via a single cable, cutting commissioning time significantly.
- Integrated Safety (Safety Integrated Level 2) – STO, SS1, SLS, and SDI functions certified to SIL 2 / PLd without external safety relays, lowering BOM cost and panel space.
- Scalable Firmware Platform – Shares the SINAMICS S120 firmware ecosystem, enabling engineers to reuse drive projects across different power classes and topologies.
- Proven Field Reliability – Deployed globally in millions of axis-hours across automotive, metals, and process industries with documented MTBF exceeding 100,000 hours.
Complete System Bill of Materials
A typical SINAMICS S120 multi-axis system built around the 6SL3351-6TE32-6AA3 includes:
- Active Line Module (ALM) – e.g., 6SL3130-7TE28-4AA3 (84 kW)
- Motor Modules (Booksize) – e.g., 6SL3120-1TE23-0AA3 per axis
- SIMOTICS S Servo Motors – e.g., 1FK7 or 1FT7 series with DRIVE-CLiQ encoder
- CompactFlash Card – 6SL3054-0EJ00-1BA0 (for firmware & parameter storage)
- PROFIBUS DP Cable – 6XV1830-0EH10 (shielded, per meter)
- 24 V DC Power Supply – SITOP PSU100S 6EP1334-2BA20
- Braking Module (if required) – 6SL3100-1BE31-0AA0
- Cabinet Mounting Hardware – DIN rail, cable ducts, and EMC shielding plates
Compliance & Industry Standards
- CE Marking – EU Low Voltage Directive 2014/35/EU & EMC Directive 2014/30/EU
- UL Listed – UL 508C (Power Conversion Equipment)
- cULus – Canadian market compliance
- IEC 61800-5-1 – Adjustable speed electrical power drive systems safety
- IEC 61800-3 – EMC requirements, Category C2
- EN ISO 13849-1 / IEC 62061 – Functional safety (PLd / SIL 2) for Safety Integrated functions
- RoHS Compliant – Restriction of Hazardous Substances Directive 2011/65/EU
Quality Assurance & Sourcing
Konmask.com sources the SIEMENS 6SL3351-6TE32-6AA3 exclusively through authorized distribution channels and verified industrial surplus networks. Every unit undergoes the following before dispatch:
- Visual inspection for physical damage, corrosion, and counterfeit indicators
- Label and date-code verification against Siemens factory records
- Functional power-on test where applicable
- Anti-static packaging with humidity indicator card
- Traceable documentation provided upon request (test report, COC)
How to Source This Part
Ready to order or need a formal quotation? Here’s how to proceed:
- Add to Cart – Immediate checkout for in-stock units with same-day dispatch (orders before 14:00 CST).
- Request a Quote – Email [email protected] with your required quantity, delivery timeline, and project details for volume pricing.
- Phone / WhatsApp – Call or message +0086 19859288691 for urgent sourcing, expedited shipping, or technical pre-sales support.
- Lead Time – In-stock units ship within 1–2 business days. Out-of-stock units: 3–10 business days depending on sourcing channel.
- Export & Customs – We handle export documentation (commercial invoice, packing list, COO) for international shipments. DDP/DAP terms available.
Application-Specific FAQ
Q: Can the CU320-2 DP replace a CU320-2 PN in an existing cabinet?
A: Not directly. The CU320-2 DP uses PROFIBUS DP while the CU320-2 PN uses PROFINET. A fieldbus infrastructure change is required. Contact us to discuss migration options.
Q: How many axes can one 6SL3351-6TE32-6AA3 control?
A: Up to 6 drive objects (axes) in a booksize topology. For more axes, a second CU320-2 DP or an upgrade to CU320-2 PN with isochronous PROFINET is recommended.
Q: Is a CompactFlash card included?
A: The CF card (6SL3054-0EJ00-1BA0) is sold separately. We recommend ordering it together to ensure firmware version compatibility.
Q: What STARTER / Startdrive version is required?
A: STARTER V5.4 SP1 or later, or SINAMICS Startdrive V16 or later. Always match firmware on the CF card to your engineering tool version.
Q: Do you provide warranty?
A: Yes. All units carry a 12-month warranty against manufacturing defects. Warranty claims are processed within 5 business days.
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