Siemens 6FX3002-2CT20-1CA0 is a pre-assembled signal cable from the MOTION-CONNECT 300 connection system, intended for the incremental encoder connection used with SINAMICS V90 and 1FL6 (S-1FL6) servo motor applications. Siemens describes it as a signal cable pre-assembled for incremental encoder in S-1FL6 with a conductor construction 3 × 2 × 0.20 + 2 × 2 × 0.25 C, a 20 m length, and a maximum outer diameter Dmax = 7.5 mm.
Instead of treating an encoder lead as an afterthought, Siemens treats it as a controlled component: known length, known conductor geometry, and a factory-built termination. That matters because incremental encoder signals are fast, noise-sensitive, and intolerant of “close enough” wiring practices.
Product Identity and Positioning
| Item | Details |
|---|---|
| Manufacturer | Siemens |
| Order number (MLFB) | 6FX3002-2CT20-1CA0 |
| Product family | Pre-assembled signal cables for SINAMICS V90 |
| Cable system | MOTION-CONNECT 300 |
| Cable purpose | Encoder cable (incremental encoder) |
| Target motor family (ordering text) | S-1FL6 |
| Length | 20 m |
| Max outer diameter | 7.5 mm |
| Lifecycle status (Siemens PLM) | PM400: Announcement of product phase-out; phase-out since 01.10.2025 |
That lifecycle note is not trivia. For maintenance teams, it changes how you stock spares; for OEMs, it influences whether you standardize on this exact MLFB or verify the successor option in the Siemens ecosystem.
Technical Specifications (Electrical + Mechanical)
| Category | Specification |
|---|---|
| Connection type | Straight connector (fixed cable outlet direction) |
| Core construction | 3 × 2 × 0.20 + 2 × 2 × 0.25 C |
| Rated voltage (power conductors) | 30 V / 30 V (EN 50395) |
| Test voltage (rms, power conductors) | 500 V |
| Min bending radius (flexible installation) | 155 mm |
| Min bending radius (fixed installation) | 6 × cable diameter |
| Max number of bends | 100,000 |
| Torsional stress | Absolute 30°/m |
| Tensile stress (max) | Flexible: 50 N/mm²; Fixed: 20 N/mm² |
| Sheath / insulation | PVC / PVC |
| Flame resistance standard | EN 60332-1-1 to 1-3 |
| Oil resistance | EN 60811-2-1 (mineral oil only) |
| Degree of protection (datasheet) | IP20 |
| Ambient temperature (permanently installed) | −25 … +80 °C |
| RoHS conformity | Yes |
A note worth being explicit about: the Siemens Industry Mall ordering text includes “UL/CSA” in the product description. Meanwhile, the generated technical data sheet line shows “Verification of suitability, UL approval: No” and “CE marking: No.” If your project has strict compliance documentation requirements, treat this as a cue to pull the official Siemens certificates for your region and installation scenario, rather than assuming labels based on a single line in the ordering text.
Why This Cable Exists (and Why It’s Not “Just a Cable”)
1) Encoder signals punish sloppy construction
Incremental encoders output fast-edged signals that can degrade with noise pickup, poor shielding, or inconsistent conductor pairing. When that degradation crosses a threshold, the drive may log encoder errors, lose position feedback, or exhibit intermittent faults that are painful to reproduce. A pre-assembled Siemens cable reduces those failure modes by controlling termination quality and ensuring the conductor construction matches the intended application.
2) Mechanical life is a design parameter, not a wish
The spec calls out bending limits, torsional stress, and a defined maximum number of bends (100,000). Those numbers matter in real routing: cable carriers, tight cabinet corners, and machine movement. Designing within these limits is one of the simplest ways to prevent “works during commissioning, fails six months later” feedback issues.
3) Installation consistency reduces commissioning time
With pre-assembled Siemens components, you reduce human variability: fewer wiring mistakes, fewer connector mis-crimps, fewer pinout surprises. On fast-paced machine builds, repeatability is money.
Application Fit: SINAMICS V90 with 1FL6 Servo Motors
Siemens positions this part inside the SINAMICS V90 ecosystem under pre-assembled signal cables, and the product description explicitly ties the encoder cable to the S-1FL6 motor context. In practical terms, this means the cable is selected when you want the encoder feedback connection between the V90 drive and a compatible Siemens servo motor/encoder interface without improvising lengths or terminations.
Because the length is 20 m, it is especially relevant in machine layouts where the drive cabinet is not directly adjacent to the motor—common in packaging lines, gantries, indexing tables, and retrofits where cabinet placement is constrained by the mechanical design.
Purchasing and Logistics Data (Helpful for B2B Listings)
| Item | Value |
|---|---|
| Net weight | 1.310 kg |
| Packaging dimensions | 500 × 500 × 80 mm |
| Commodity code | 85444290 |
| Country of origin | China |
| EAN / UPC | EAN 4042948674017; UPC 804766365041 |
These fields are not “marketing fluff.” They help buyers match procurement records, speed customs classification work, and reduce back-and-forth on packaging and handling.
Selection Guidance: When to Choose 6FX3002-2CT20-1CA0
| Your situation | Why this part makes sense |
|---|---|
| You need a 20 m encoder feedback run in a V90 + 1FL6 setup | Exact length and application mapping are stated in Siemens ordering data |
| You want predictable mechanical routing limits | Defined bend radius, torsion, and bend-cycle rating help engineering choices |
| You are standardizing build quality across machines | Pre-assembled cable reduces termination variability and commissioning errors |
| You are planning spares for installed base | Siemens indicates phase-out status, which affects stocking strategy |
Practical Installation Notes (Designed to Prevent Future Faults)
Keep this grounded in the specs:
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Respect bend radius: Use 155 mm minimum radius for flexible routing; for fixed routing, follow 6× diameter. Tight bends are a common root cause of conductor fatigue and intermittent encoder faults.
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Treat bend-cycle rating honestly: The spec lists 100,000 bends max. If your application is a high-cycle drag-chain axis, evaluate whether you are inside that mechanical envelope or whether a higher-flex rated solution is required.
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Mind environmental assumptions: The datasheet lists IP20. That typically implies cabinet/protected installation rather than exposed washdown environments.
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Confirm compliance needs: If UL/CSA labeling is required for the end product, pull the official Siemens certificates for your delivery region and the exact configuration, because Siemens’ own lines show mixed signals between ordering description and the generated data sheet flags.
Summary
Siemens 6FX3002-2CT20-1CA0 is a MOTION-CONNECT 300 pre-assembled incremental encoder signal cable in the SINAMICS V90 connection ecosystem, designed for S-1FL6 motor encoder applications. It provides a defined 20 m length, straight connector form factor, specified conductor construction (3 × 2 × 0.20 + 2 × 2 × 0.25 C), and clearly stated mechanical limits such as 155 mm bending radius (flex), 6×D (fixed), 30°/m torsion, and 100,000 bend cycles.
