Siemens 8LSA56.E0045D200-0 AC Servo Motor – 8LSA Series

Siemens 8LSA56.E0045D200-0 — Resolver-Feedback AC Synchronous Servo Motor for Precision Multi-Axis Motion Control

The 8LSA56.E0045D200-0 is a compact-frame AC synchronous servo motor from the Siemens/B&R 8LSA series, rated at 4.5 Nm continuous torque at 2000 RPM with resolver-based position feedback (D200 suffix). It is designed for closed-loop velocity and position control in multi-axis machine architectures where deterministic torque response, low cogging, and long-term mechanical stability are non-negotiable. The smooth shaft variant (suffix -0) accommodates direct coupling or precision bellows couplings without keyway-induced backlash.

Originally developed within the B&R Automation 8LSA motor family and subsequently integrated into the Siemens servo portfolio, this motor is natively commissioned on B&R ACOPOS drive platforms and is cross-compatible with Siemens SINAMICS S120 and V90 drive families via standard resolver interface cards. Its IEC B5 flange and 56 mm frame size (size code 56) align with widely adopted mechanical interfaces across European machine tool and packaging OEM standards.

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Technical Parameters

Hardware Logical Analysis

Permanent Magnet Rotor Architecture: The 8LSA56 employs a surface-mounted rare-earth permanent magnet rotor (NdFeB grade). This topology delivers a high torque-to-inertia ratio — critical for axes requiring rapid acceleration and deceleration cycles, such as pick-and-place heads or cam-synchronized packaging axes. The absence of rotor windings eliminates rotor copper losses, reducing thermal drift in the air gap and maintaining torque constant (Kt) stability across the operating duty cycle.

Resolver Feedback (D200 Suffix): The D200 designation specifies a 2-pole resolver as the primary position transducer. Unlike optical encoders, resolvers are inherently immune to contamination, vibration shock, and condensation — making them the preferred feedback device in foundry, press-shop, and food-processing environments. The resolver outputs a continuous analog sine/cosine signal pair; the drive’s resolver-to-digital converter (RDC) interpolates position to typically 12–16 bits per revolution, yielding sub-arc-minute positioning resolution at 2000 RPM. There are no battery-backed absolute position registers to maintain, simplifying machine restart procedures after power loss.

EMC Design: The stator winding uses a distributed lap winding configuration with phase-to-phase and phase-to-ground insulation rated for 600 V peak (PWM-hardened). The motor housing is die-cast aluminum with continuous 360° EMC shielding contact at the cable entry point, suppressing conducted emissions from the PWM switching frequency (typically 4–16 kHz) back onto the machine frame. The resolver cable shield is terminated at the motor connector shell, forming a Faraday cage around the low-level analog feedback signals and preventing common-mode noise injection into the drive’s RDC circuit.

Thermal Management: The stator lamination stack is press-fit into the aluminum housing with controlled interference, ensuring low thermal resistance between winding hot-spot and housing surface. At rated continuous torque (4.5 Nm, 2000 RPM), the winding temperature rise above ambient is approximately 60–70 K under IC410 cooling, leaving a 25–35 K margin to Class F thermal limit. This margin supports intermittent overload cycles (up to 3× rated torque for ≤5 seconds) without triggering thermal derating.

System Integration Benefits

• Zero-parameter drive commissioning on ACOPOS: B&R ACOPOS drives store the 8LSA56.E0045D200-0 motor data set natively in their firmware library. Selecting the part number in Automation Studio auto-populates all current controller, speed controller, and position controller parameters — eliminating manual motor ID runs and reducing axis commissioning time to under 10 minutes.
• Deterministic torque response: The synchronous motor topology, combined with field-oriented control (FOC) in the ACOPOS or SINAMICS drive, delivers torque response times below 1 ms from command to 90% of target torque — enabling tight synchronization in electronic gearing and cam applications.
• Resolver-based absolute-within-one-revolution position: On power-up, the drive reads resolver position immediately without homing cycles, reducing machine restart time after E-stop events. For multi-turn absolute position, a single-turn resolver combined with a motor brake and incremental reference mark is sufficient for most packaging and assembly applications.
• IP65 ingress protection: The shaft-side lip seal and O-ring sealed connector interface allow direct wash-down exposure to water jets (IEC 60529 IPX5 equivalent), supporting hygienic machine designs in food, beverage, and pharmaceutical packaging lines without additional motor enclosures.
• Low cogging torque: The distributed stator winding and skewed rotor magnet arrangement reduce cogging torque to below 1.5% of rated torque, enabling smooth velocity control at low speeds (below 10 RPM) — relevant for winding tension control, adhesive dispensing, and precision positioning axes.
• Standardized IEC B5 mechanical interface: The 56 mm B5 flange is dimensionally interchangeable with a broad range of planetary and helical inline gearboxes from Neugart, Apex, and Wittenstein, allowing gear ratio changes without motor replacement or custom adapter plates.
• Diagnostic transparency via drive integration: When paired with SINAMICS S120 or ACOPOS P3, the drive continuously monitors winding temperature (via PTC thermistor embedded in stator), resolver signal amplitude, and motor utilization (I²t model). Fault codes are mapped to IEC 61800-7 CiA 402 device profile, enabling direct integration with PROFINET, EtherCAT, or Powerlink diagnostic dashboards.
• Long service life under cyclic load: The sealed deep-groove ball bearings (both DE and NDE) are grease-packed for L10 bearing life exceeding 20,000 hours at rated speed and radial load. The IP65 shaft seal prevents lubricant contamination, maintaining bearing preload and shaft runout within specification throughout the machine lifecycle.

Quality Assurance & Global Logistics

Every 8LSA56.E0045D200-0 unit dispatched from our Xiamen, China facility is sourced exclusively from verified Siemens/B&R authorized distribution channels or factory-sealed OEM surplus stock. Each unit undergoes a structured incoming inspection protocol: nameplate data verification against the purchase order part number, visual inspection of shaft, flange, and connector interfaces for transit damage, resolver winding continuity check (R1–R2, S1–S3, S2–S4 terminal pairs), and dimensional verification of shaft diameter and B5 pilot diameter against published tolerances.

Units are packed in anti-static foam-lined export cartons with moisture-barrier desiccant bags, meeting ISTA 2A transit test standards for air freight. Shipments are dispatched via DHL Express, FedEx International Priority, or UPS Worldwide Express — with typical transit times of 3–5 business days to Europe and North America, and 2–4 business days to Southeast Asia. Full export documentation is provided as standard: commercial invoice, packing list, and certificate of origin. CITES and dual-use export compliance screening is completed prior to dispatch for all destinations.

A 12-month warranty covers all units against manufacturing defects and resolver signal failure. Warranty claims are processed within 5 business days of receipt of the returned unit, with replacement shipment or credit note issued accordingly.

Contact Information

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