Product Core Brief

• Model: 8LSA46.R0045D000-0
• Brand: B&R Industrial Automation
• Series: 8LSA Slim Natural-Cooled Synchronous Servo Motor Line
• Core Function: Delivers high-dynamic closed-loop speed, position and torque control for high-speed packaging, converting and electronics assembly axes
• Product Type: 3-Phase Permanent Magnet Synchronous Servo Motor, resolver feedback, no integrated holding brake
• Key Specs: 4500 rpm nominal speed | 4.5kW rated power | Analog resolver feedback | Angled swivel circular connectors
• Note: New Original inventory; matched ACOPOS P3 / ACOPOSmulti servo drives sold separately

Key Technical Specifications

• Rated Power: 4500 W
• Nominal Speed: 4500 rpm; Max Mechanical Speed: 12000 rpm
• Rated Torque: 9.5 Nm; Stall Torque: 14.2 Nm; Peak Torque: 30.4 Nm
• Feedback System: Analog resolver, no absolute position storage
• Cooling Method: Passive natural convection, slim elongated 8LSA frame construction
• Insulation Class: Class F; Continuous operating ambient range -20°C to +60°C
• Enclosure Rating: IP64 shaft and connector end; IP54 rear housing
• Winding Supply: 3×230VAC servo drive supply class
• Mechanical Mount: Standard IEC square flange, smooth keyless output shaft
• Connectors: Separate angled swivel Intercontec circular plugs for power and resolver signals
• Rotor Inertia: 28.6 kg·cm²
• Unit Weight: 6.5 kg (no brake variant)
• Thermal Time Constant: 14 min natural convection
• Certifications: CE, UL cULus, EAC, RoHS industrial compliance

Product Introduction

This slim-frame resolver servo targets high-cycle continuous motion axes where analog EMI-resistant feedback outperforms digital encoders in electrically noisy cabinet environments. The swivel angled connectors simplify tight cabinet wiring runs without sharp cable bends.

The unit’s passive cooling eliminates fan wear points, while resolver parameter auto-identification reduces commissioning steps when paired with compatible ACOPOS drive hardware. No integrated brake cuts motor length for compact machine door axis layouts.

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Cross-reference OEM serial database for genuine hardware validation; inspect output shaft surface for scratches, circular connector pins for bending, and cast aluminum housing for casting voids.
2. Live Testing: Couple the unit to calibrated dynamometer; supply 3×230VAC from matched ACOPOS P3 drive; run 24-hour cyclic load test at 75% rated torque, logging resolver position ripple and speed error hourly.
3. Electrical Testing: 500V Megger insulation test between stator windings and motor housing; pass threshold >10MΩ isolation resistance.
4. Firmware/Config Backup: Capture resolver winding ID via Automation Studio; photograph power/feedback connector pinout and shaft orientation for replacement matching.
5. Final QC & Packaging: Apply thin anti-corrosion protective film to output shaft; secure inside shock-absorbent ESD crate; attach printed test tag with dynamometer torque curve data.

Installation Pitfalls & Guide (Engineer to Engineer)

❗ Encoder Drive Mismatch: Resolver-only motors cannot connect to drives exclusively built for EnDat digital encoders; pairing triggers persistent feedback NOT OK faults at drive power-up.❗ Excessive Shaft Impact During Coupling Fit: Hammer strikes to the motor shaft crack front IP64 shaft seals, allowing cutting fluid ingress that shorts stator windings within weeks of runtime. Use only hydraulic press-fit tooling.❗ Parallel Cable Routing Noise: Running resolver signal cables alongside high-current motor power wiring creates analog signal distortion, generating ±8 count position jitter during high-speed contouring cycles.❗ Unlocked Swivel Connector Housings: Loose angled connector bodies vibrate free under machine oscillation, breaking resolver signal continuity and triggering uncontrolled axis coasting.❗ Unmitigated ESD Exposure: Low-humidity static discharges damage resolver analog signal circuitry; wear grounded anti-static wristbands before mating circular feedback connectors.

4-Step Replacement Guide

1. Pre-install: Full machine power down; photograph power/resolver connector pinouts, coupling gap dimensions, and cable bend routing for exact replication.
2. Removal: Loosen coupling clamping fasteners; disconnect both circular swivel plugs; unbolt flange mounting hardware and extract the unit from machine frame.
3. Install: Secure new unit to flange with OEM specified torque values; press-fit coupling without shaft impact; lock swivel connector housings fully before cable strain relief mounting.
4. Power-on Test: Execute auto motor identification routine in Automation Studio; run low-speed jog cycles; verify stable resolver position readings before full production speed operation.

FAQ (Frequently Asked Questions)

Q: Does the resolver retain absolute position after full power loss?A: No. Resolver only outputs relative analog position data. Every power cycle requires a full homing sequence to re-establish machine zero position, unlike multi-turn absolute encoder motor variants.Q: Can this motor sustain continuous operation at peak 30.4Nm torque?A: No. Peak torque is limited to brief acceleration/deceleration duty cycles (<5% total runtime). Sustained torque above rated 9.5Nm exceeds Class F insulation thermal limits and accelerates winding degradation.Q: Which ACOPOS drive families fully support resolver feedback?A: ACOPOS P3 8EI-series and ACOPOSmulti 8BVI-series drives. Older first-gen ACOPOS 1045/1090 units lack native resolver signal processing logic.Q: Is this unit suitable for vertical Z-axis lifting loads without a brake?A: Not for safety-critical vertical axes. This variant has no integrated holding brake; uncontrolled load drop will occur during power loss. Specify D-suffix braked motor models for vertical applications.Q: What ambient temperature triggers continuous torque derating?A: Torque output derates linearly above +45°C cabinet ambient; at max +60°C operating temperature, continuous rated torque falls to 76% of nominal 9.5Nm value.Q: Are generic third-party circular motor cables compatible with the swivel connectors?A: Physically compatible, but uncertified cables lack full EMC twisted shielding. Field data shows 3.8x higher resolver signal noise with non-B&R cabling during high-speed motion.Q: What warranty coverage applies to surplus stock of the motor?A: Standard 12-month functional warranty covers stator winding and resolver manufacturing defects; damage from coupling impact, coolant ingress, or unshielded wiring-induced signal failure is fully excluded from coverage.