Description
The Siemens SIMOTICS S-1FL6 (e.g., 1FL6044-2AF21-1AG1 / 1FL6044-2AF21-1AH1) is a high-dynamic, permanently excited synchronous servo motor designed for use with SINAMICS V-ASSISTANT / SINAMICS V90 servo drive (1FL6 ↔ V90 PN or PTI) in the low-to-mid power range (0.05–2 kW). The listed models are 1FL6044 — flange size SH40, rated approx. 0.4 kW (400 W), 3000 rpm, with absolute encoder (20-bit + multiturn) and 230 V AC operating voltage (derived from V90 drive’s internal DC bus).
Key Differentiators:
- 1FL6044-2AF21-1AG1 → With holding brake (–G1 = brake option)
- 1FL6044-2AF21-1AH1 → Without brake (–H1 = no brake) — verify suffix letter meaning per latest Siemens configurator; G=brake, H=plain shaft
- Operating Voltage: The motor is fed from the V90 drive which accepts 1× 230 V AC single-phase (PTI version) or 3× 400 V AC (PN version drive) — motor itself is a 3-phase permanent magnet synchronous motor with encoder feedback.
The “Converter” referenced in title is the SINAMICS V90 servo drive (order separately — e.g., 6SL3210-5FB10-2UF0 for 0.4 kW V90 PN) which converts mains to the PWM waveform for the 1FL6 motor.
Key Features
- Power Range (1FL6 Family): 0.05 kW (0.16 Nm) → 2.0 kW (7.2 Nm) @ 3000 rpm
- Encoder: Absolute single-turn/multi-turn (20-bit + 12-bit multiturn — “Value Encoder”) — no homing needed after power cycle when used with V90.
- Cooling: Natural convection (≤ 1 kW); forced vent (≥ 1.5 kW option)
- Brake Option: 24 V DC spring-applied electromagnetic brake (on G-suffix models)
- Shaft / Connector: Plain shaft with key (std); connector for encoder + brake power (M23 circular)
- Country of Origin: China / Germany (Siemens Global)
Model & Specification Table (1FL6044 Example)
Order No. / Suffix | Rated Power | Rated Torque | Brake? | Encoder Type | Typical V90 Drive Match (0.4 kW) |
|---|---|---|---|---|---|
1FL6044-2AF21-1AG1 | 0.4 kW @ 3000 rpm | ~ 1.27 Nm | ✅ Yes (24V DC) | Abs. 20-bit + MT | 6SL3210-5FB10-2UF0 (V90 PN 0.4kW) |
1FL6044-2AF21-1AH1 | 0.4 kW @ 3000 rpm | ~ 1.27 Nm | ❌ No | Abs. 20-bit + MT | Same V90 drive as above |
💡 V90 Drive Selection:
V90 PN (PROFINET): e.g. 6SL3210-5FB10-2UF0 (0.4kW), 6SL3210-5FB10-4UA0 (0.75kW) — controlled via PROFIdrive telegram from S7-1200/1500 or other PROFINET master. V90 PTI (Pulse + Dir / CW-CCW): e.g. 6SL3210-5FE10-2UF0 — receives step & direction or CW/CCW pulses from a PLC or motion controller.Both drive versions accept 1× 230V AC single-phase (small frames ≤ 0.75 kW) or 3× 400V AC (≥ 1.5 kW frames) — check exact drive rating.
Technical Specifications (Representative — 1FL6044-2AF21-1AG1, 0.4 kW, with Brake)
Parameter | Specification |
|---|---|
Model / Order Code | 1FL6044-2AF21-1AG1 (Siemens SIMOTICS S-1FL6 Servo Motor) |
Rated Power | 0.4 kW (400 W) |
Rated Speed | 3000 rpm (max. 4500 rpm overspeed typical) |
Rated Torque (Mn) | 1.27 Nm |
Rated Current (Im) | ~ 1.6 A (motor phase current — drive senses auto) |
Encoder Type | Absolute encoder, 20-bit single-turn + 12-bit multi-turn (via EnDat-like Siemens proprietary “Value Encoder”) |
Brake | Yes — 24 V DC (spring-applied, electromagnetically released); holding torque ~ 1.5 Nm |
Shaft / Key | Plain shaft Ø 14 mm with keyway (std SH40 frame) |
Flange Size (SH) | SH 40 (face 40 mm square mounting — IEC-like) |
Cooling | Self-cooled (natural convection) |
Degree of Protection | IP65 (with shaft seal), IP54 (with brake connector) |
Motor Connector | Circular M23 (encoder + brake power + PE) — mate with V90 drive-side cable (R88… not needed — Siemens uses own cable set: 6FX3002-…) |
Operating Ambient | 0 … +40 °C (derate above), -20 … +60 °C storage |
Weight (Motor Only) | ~ 1.8 kg (w/o brake); + ~ 0.3 kg (with brake) |
Standards | CE, UL, cUL, RoHS |
⚠️ Cable Note: Siemens 1FL6 motors require Siemens original motor power & encoder cables (6FX3002-… series) — not Omron R88A or third-party. For 1FL6044:
Power/Brake cable: e.g. 6FX3002-2CT10-1AF0 (3 m) Encoder cable: e.g. 6FX3002-5BK02-1AF0 (3 m)Always confirm length & connector type (straight / angled) per your panel layout.
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty (rotation & encoder check on test rig)
- Technical support for:
- Matching correct V90 drive (PN vs PTI, power rating) & cables (6FX3002-…)
- Brake wiring (24V DC external supply or V90 brake output — observe polarity)
- Encoder type clarification (absolute multiturn — no re-home after power loss if V90 parameterized correctly)
- Parameter quick-start with SINAMICS V-ASSISTANT software (auto-recognition of 1FL6 motor)
- Cross-check compatibility if migrating from 1FK7 (SIMOTICS S-1FK7 → 1FL6 is NOT direct mechanical drop-in — flange/encoder differ)
Delivery Time
- Standard delivery: 3-5 working days (stock motor & drive ratings)
- Express shipping available upon request (priority for downtime)
Why Choose Our Store
- Genuine Siemens SIMOTICS S-1FL6 + SINAMICS V90 system components
- Global supply network with competitive pricing
- Expertise in S-1FL6 / V90 commissioning (PROFINET telegram, step/dir, auto-tuning)
- Comprehensive technical documentation (dimension drawing, cable part number cross-ref, V-ASSISTANT guide)
- Responsive customer service and support
Applications
- Cartesian Robots / XYZ Gantries: Pick-and-place, labeling heads — V90 PN + 1FL6 controlled by S7-1200.
- Packaging Machines: Former / wrapper index axes, flight bar drives.
- Conveyor / Index Tables: Low-power servo for precise positioning with absolute encoder (no homing switch needed).
- Semiconductor / Lab Automation: Small precision axes with 20-bit encoder resolution.
- Retrofit: Replace stepper systems with servo for better torque-at-low-speed & no lost steps.





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