Siemens 1FL6092-1AC61-2LA1 Servo Motor – SIMOTICS S-1FL6

Siemens 1FL6092-1AC61-2LA1 — Permanent-Magnet Synchronous Servo Motor in the SIMOTICS S-1FL6 High-Inertia Series

The 1FL6092-1AC61-2LA1 is a shaft-height-90 mm, naturally cooled, permanent-magnet synchronous servo motor (PMSM) from Siemens’ SIMOTICS S-1FL6 platform. It is engineered for servo axes where load-to-motor inertia ratios exceed 10:1 and where absolute position retention across power cycles is a hard system requirement. The motor integrates a 23-bit single-turn absolute encoder using the Hiperface DSL protocol, an electromagnetic holding brake, and a Class F winding insulation system — all within an IP64-rated cast-iron frame. It operates natively within the SINAMICS S120 and S210 drive ecosystems and is parameterized automatically via TIA Portal’s drive commissioning wizard.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

High-Inertia Rotor Architecture: The 1FL6092-1AC61-2LA1 belongs to the high-inertia sub-family of the 1FL6 series, distinguished by a rotor with a larger polar moment of inertia compared to the standard-inertia variant at the same shaft height. This is achieved through a larger rotor diameter-to-length ratio and a higher mass distribution toward the rotor periphery. The practical consequence is a significantly improved inertia matching ratio when driving loads such as large-diameter ballscrews, rotary tables, or gearbox-coupled conveyor drives. In axes where the load inertia is 5–15× the motor inertia, the high-inertia rotor reduces the effective inertia mismatch, allowing the SINAMICS drive’s speed controller to operate with higher proportional gain (Kp) without exciting mechanical resonance. This translates directly to tighter position error bands and faster settling times after step disturbances.

Hiperface DSL Single-Cable Encoder Interface: The 23-bit absolute single-turn encoder communicates via Hiperface DSL — a digital, serial, single-cable protocol developed by Sick AG and adopted by Siemens for the 1FL6 series. Unlike legacy resolver or incremental encoder wiring, Hiperface DSL superimposes the digital encoder data signal onto the motor power cable using a differential pair within the same cable jacket. This eliminates the separate encoder cable run, reducing wiring harness complexity by approximately 40% in multi-axis cabinets. The 23-bit resolution yields 8,388,608 counts per revolution, providing a position granularity of approximately 0.043 arc-seconds per count at the motor shaft — sufficient for sub-micron positioning when combined with a 5 mm pitch ballscrew. Absolute position is stored in non-volatile memory within the encoder ASIC; the drive reads absolute position within the first DRIVE-CLiQ communication cycle after power-on, eliminating the homing sequence that incremental systems require.

EMC Design and Shielding Architecture: The motor frame is manufactured from cast iron, which provides inherent electromagnetic shielding for the stator winding and encoder electronics. The Hiperface DSL signal path uses differential signaling with a common-mode rejection ratio (CMRR) exceeding 60 dB, making it resistant to the high-frequency common-mode noise generated by IGBT switching in the SINAMICS inverter stage. The motor’s power connector is a Siemens-standard bayonet-lock connector with 360° shield termination at the motor housing, ensuring the cable shield is bonded to the motor frame at the point of entry — the correct EMC practice per IEC 61800-3 for Category C2 drive systems.

Integrated Holding Brake — Mechanical and Electrical Logic: The holding brake is a spring-applied, electrically released (SAER) electromagnetic brake rated for DC 24 V. In the de-energized state, spring force clamps the brake disc against the friction surface, providing a defined holding torque sufficient to maintain axis position under gravity load. When the drive applies 24 V DC, the electromagnet overcomes the spring force and releases the disc. This fail-safe logic means that any power interruption — including an E-stop or drive fault — automatically engages the brake without requiring a control signal. The brake is not rated for dynamic braking (stopping a rotating shaft); it is a holding device only. The SINAMICS drive sequences brake release and engagement via the SBC (Safe Brake Control) function, which is part of the Safety Integrated Basic Functions available without additional licensing on S120 and S210.

Thermal Management — Class F Winding with IC 410 Cooling: The stator winding uses Class F insulation (155 °C thermal limit), providing a 25 °C thermal margin above the Class B rating that many competing motors use. Natural convection cooling (IC 410) relies on the motor frame surface area and fin geometry to dissipate heat without a shaft-mounted fan. This eliminates the fan as a failure mode and removes the acoustic noise associated with forced-air cooling — relevant in laboratory, medical, and food-processing environments. The thermal model within the SINAMICS drive monitors winding temperature via a KTY 84-130 temperature sensor embedded in the stator, enabling the drive to issue an overtemperature warning before the thermal limit is reached and to derate output current automatically.

System Integration Benefits

• Automatic Motor Identification via DRIVE-CLiQ: The Hiperface DSL encoder protocol is DRIVE-CLiQ-compatible at the drive interface level. When connected to a SINAMICS S120 or S210, the drive reads the motor’s electronic nameplate (MLFB, rated data, encoder parameters) automatically during the first commissioning wizard step in TIA Portal. Manual parameter entry is eliminated, reducing commissioning errors to near zero.
• Deterministic Torque Response: The SINAMICS S120 current controller operates at a 125 µs sampling cycle. Combined with the 1FL6092’s low stator inductance and the high-resolution 23-bit encoder feedback, the torque control loop achieves a bandwidth exceeding 800 Hz — sufficient for suppressing torque ripple at speeds below 10 rpm, which is critical for grinding and honing applications.
• Safe Brake Control (SBC) Integration: The drive’s SBC function monitors brake feedback and sequences brake engagement with zero-speed detection, preventing brake application onto a rotating shaft. This is a TÜV-certified Safety Integrity Level 2 (SIL 2) / Performance Level d (PLd) function, satisfying EN ISO 13849-1 requirements for safety-relevant axes without external safety relays.
• Single-Cable Wiring Reduces Cabinet Footprint: Eliminating the separate encoder cable reduces the number of cable entry points in the control cabinet, lowers the cable tray fill ratio, and simplifies cable routing in multi-axis gantry systems. In a 6-axis system, this removes 6 encoder cable runs and 12 connector terminations.
• Absolute Position Retention Eliminates Homing Cycles: In automated production lines, homing cycles consume machine time and require clear travel paths. With the 23-bit absolute encoder, the axis position is valid immediately after power-on. For a machine with 10 axes and a 30-second homing cycle per axis, eliminating homing saves 5 minutes per startup — significant in multi-shift operations.
• Thermal Sensor Integration with Drive Derating: The KTY 84-130 sensor output is read directly by the SINAMICS drive, which applies a continuous thermal model. If ambient temperature rises or duty cycle increases, the drive reduces peak current before the winding reaches its thermal limit — protecting the motor without requiring external thermal relays or PTC trip circuits.
• Compatibility with SINUMERIK CNC: The 1FL6092-1AC61-2LA1 is listed in the Siemens SINUMERIK 840D sl and 828D motor databases. CNC axis parameterization is completed by selecting the MLFB from the database; the CNC automatically loads rated speed, torque, encoder resolution, and brake parameters. This eliminates manual data entry in the machine data list.
• Vibration Class A Compliance: The motor meets IEC 60034-14 vibration class A, with shaft vibration velocity below 1.8 mm/s RMS at rated speed. This is the baseline requirement for machine tool spindle and feed axis applications and ensures that motor-induced vibration does not degrade surface finish quality in machining operations.

Quality Assurance & Global Logistics

Every unit of the Siemens 1FL6092-1AC61-2LA1 dispatched from our Xiamen, China facility undergoes a structured pre-shipment verification protocol. The nameplate MLFB, serial number, and date code are cross-referenced against Siemens’ product traceability records. The encoder connector, power connector, shaft, and brake connector are inspected for mechanical integrity and pin condition. Units are packed in anti-static foam-lined cartons with shock-indicator labels; original Siemens packaging is preserved where available.

Xiamen is a designated free-trade port with direct sea freight connections to Rotterdam, Hamburg, Los Angeles, Dubai, and Singapore, and daily air freight capacity to major industrial hubs in Europe, Southeast Asia, and the Middle East. Standard export documentation — commercial invoice, packing list, certificate of origin — is prepared for every shipment. HS code 8501.53 applies to this motor category for customs classification. For time-critical MRO requirements, air freight from Xiamen Gaoqi International Airport reaches Frankfurt in approximately 5 business days and Los Angeles in 3 business days. Sea freight to Rotterdam averages 28–32 days. All shipments are covered by cargo insurance. A 12-month warranty from the shipment date covers manufacturing defects confirmed by inspection.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
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