Description
The listed Siemens 1FK7101-5AF71-1TG0, 1FK7100-5AF71-1TG0, 1FK7103-5AF71-1DG0 are SIMOTICS S synchronous servo motors from the 1FK7 series (compact permanent-magnet AC servo motors), designed for use with SINAMICS S120 / S110 / SIMODRIVE 611D drives. The 1FK7 series offers:
- 1FK7100 / 1FK7101 / 1FK7103 → Typical rated powers in the 0.2 kW – 3.5 kW range (exact depends on winding / “5AF71” = frame size 1FK7, 5 = approx. 3.5 Nm rated torque variant? Actually 1FK7100/1/2/3 denote flange size & length: 1FK7100 = smallest (40 mm flange), 1FK7101 = mid (55 mm?), 1FK7103 = larger (75 mm?) — check Siemens 1FK7 catalog: 1FK7 1st digit: 0=small,1=medium,3=larger; “5AF71” is the order code segment for winding & brake option — full decode requires Siemens DT Configurator / Catalog D21.1).
- Key features: Built-in absolute encoder (usually 20-bit or 24-bit EnDat / SSI — 1FK7 standard = EnDat 2.1 20-bit multiturn absolute; some “-1TG0” / “-1DG0” suffixes define encoder type: TG0 often = EnDat 2.1 abs multiturn + DrvClq; DG0 similar variant), optional holding brake, IP65 / IP67 (with shaft seal), natural cooling or forced vent (some 1FK7 with fan).
- These motors are NOT stepper motors — true 3-phase synchronous PM motors for closed-loop position/speed control via SINAMICS drive.
Typical pairing: 1FK7101-5AF71-… → SINAMICS S120 (CU310-2 PN/DP + PM240-2 Power Module) or SIMODRIVE 611D (with matching resolver/encoder cable & power cable — order separately by length & connector type: e.g., 6FX2002-… motor power cable, 6FX2003-… encoder cable).
Key Features
- Torque Range: Approx. 0.3 – 17 Nm (continuous) depending on frame / winding (1FK7100 ~ 0.3–1.2 Nm; 1FK7101 ~ 1.2–5 Nm; 1FK7103 ~ 5–17 Nm — verify by exact catalog)
- Speed: Rated 3000 rpm typical; max mechanical 6000 rpm (some windings)
- Encoder: EnDat 2.1 absolute multiturn (20-bit or 24-bit — depends on “-1TG0/-1DG0” detail — both usually EnDat abs)
- Brake: “-5AF71” often includes holding brake (A=brake, F=fluid seal etc. — check: 5 = with brake; no 5 = no brake — Siemens 1FK7: position 4 of motor code = brake flag: e.g., …-5A… means WITH brake; …-5B… = no brake typically — confirm by DT Configurator print)
- Protection: IP65 (IP67 with shaft seal option)
- Cooling: Natural convection (self-cooled — standard for 1FK7 compact; forced vent option on larger frames)
- Country of Origin: Germany / China (Siemens Industry)
Model & Variant Reference (1FK7 Series Listed Items — Indicative)
Model | Frame / Approx. Size | Encoder / Suffix Note | Typical Use |
|---|---|---|---|
1FK7100-5AF71-1TG0 | 1FK7100 (small flange ~40mm) — low inertia, low torque (~0.3–1 Nm cont.) | EnDat 2.1 Abs Multiturn + DriveCliq? (TG0 often = EnDat + Tech Data in DriveCliq — “T” = EnDat, “G0” = connector & cable type) — WITH brake (5A) | Small pick/place, electronic assembly — pairs with S120 CU310-2 + small PM240-2 |
1FK7101-5AF71-1TG0 | 1FK7101 (mid flange ~55mm) — med torque (~1.2–5 Nm cont.) | Same encoder type (EnDat 2.1 abs multiturn) — WITH brake (5A) | Medium machine axis — packaging, labeling, general servo |
1FK7103-5AF71-1DG0 | 1FK7103 (larger flange ~75mm) — higher torque (~5–17 Nm cont.) | Similar EnDat abs (DG0 = EnDat + slight var. — confirm — usually also EnDat 2.1) — WITH brake (5A) | Higher inertia axis — main drive, spindle assist, larger press feed |
⚠️ Critical Selection & Installation Notes:
Technical Specifications (Representative — 1FK7101-5AF71-1TG0, Mid-Size 1FK7 ~ 3 Nm Rated, 3000 rpm, EnDat Abs, w/ Brake)
Parameter | Specification (Indicative — check Siemens Catalog D21.1 for exact values by order code) |
|---|---|
Model / Order Code | 1FK7101-5AF71-1TG0 (Siemens SIMOTICS S 1FK7 Synchronous Servo Motor) |
Rated Power | ~ 0.75 – 1.0 kW (dep. on winding — “5AF71” segment indicates specific winding & brake — exact in DT Config print) |
Rated Torque (M_N) | ~ 2.4 – 3.0 Nm (continuous @ rated speed 3000 rpm — typical for 1FK7101 medium winding) |
Peak Torque (M_max) | ~ 2× rated (e.g., 6–9 Nm — 5 s short-time) |
Rated Speed (n_N) | 3000 rpm (typical — some windings 2000/4500 rpm available) |
Max. Mechanical Speed | 6000 rpm (some windings) |
Rotor Inertia | ~ (0.0001 – 0.0005 kg·m² depending on frame — 1FK7101 ~ 0.0002 kg·m²) |
Encoder Type | EnDat 2.1 Absolute Multiturn (20-bit or 24-bit singleturn+multiturn) — electronic nameplate for SINAMICS auto-ID |
Holding Brake | Yes (present — “5A” in code = with brake) — 24 V DC (typ. 0.4–0.8 A hold current), spring-applied, released by energizing |
Degree of Protection | IP65 (IP67 with shaft seal option — check suffix) |
Cooling | Self-cooled (natural convection — standard for 1FK7 compact; forced vent available on some frames) |
Flange / Shaft | IEC 55 mm flange (1FK7101) — shaft with feather key (std) or plain (opt); shaft seal std. |
Connection | Power: Round M17 connector (or terminal box on some — 1FK7 = connector); Encoder: M23 round (EnDat) — mates with SINAMICS S120 encoder cable (6FX2003-…) |
Weight (Motor Only) | ~ 2.5 – 4 kg (dep. on frame & brake — 1FK7101 ~ 3 kg) |
Operating Temp. | 0 … +40 °C (derated to +55 °C — check catalog curve) |
Standards | CE, UL, cUL, RoHS, EN 60034-1 / EN 61800-5-1 |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty (spin test on SINAMICS test rig — verify encoder count & brake release)
- Technical support for:
- Drive pairing confirmation (SINAMICS S120 CU310-2 PN + PM240-2 — size PM by motor current × 1.5 safety)
- Cable selection (power 6FX2002-□ — length & straight/angled M17; encoder 6FX2003-□ — EnDat M23 to SMC20/CU310-2 encoder port; brake leads usually in power cable jacket)
- Brake control wiring (24V DC brake release — drive BICO or external relay — ensure brake released BEFORE torque enable)
- Encoder / DRIVE-CLiQ auto-ID walkthrough (connect → power up → “Accept motor data from EEPROM” in STARTER/SCOUT)
- Inertia / torque check (verify motor torque sufficient for load + accel)
- Cross-ref to 1FT7 (high-dynamics) or 1PH7 (spindle) if application different
- Optional: Motor power & encoder cables (6FX2002-/6FX2003- series), mating connectors, brake release unit
Delivery Time
- Standard delivery: 3-5 working days (stock — 1FK7 often NOS or new in box)
- Express shipping available upon request
Why Choose Our Store
- Genuine Siemens SIMOTICS S 1FK7 servo motors — not rewound/clone (encoder cal & winding balance critical)
- Global supply network with competitive pricing
- Expertise in SINAMICS S120 + 1FK7 system sizing (motor-drive-cable-brake)
- Comprehensive technical documentation (connection dwg, pinout of M17/M23 connectors, STARTER auto-config steps)
- Responsive customer service and support
Applications
- Packaging / Labeling Machines: Indexing, registration, cut-length control — medium dynamic (1FK7101)
- Pick & Place / Electronics Assembly: Low-inertia small axes (1FK7100) for high-speed light-duty
- Machine Tool Aux Axes / Feed Drives: Higher torque axes (1FK7103) — synchronized with CNC (SINUMERIK 828D/840D sl + S120)
- Printing / Converting: Dancer / tension roll control via torque mode
- Retrofit / Spare: Exact 1FK7 p/n match — SINAMICS S120 auto-detects motor parameters from EEPROM via EnDat — minimal recommissioning
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