Product Core Brief

• Model: 8MSA8S.E1-P10C
• Brand: B&R Industrial Automation
• Series: 8MSA High-Torque Synchronous Servo Motor Series
• Core Function: Delivers precise closed-loop position, speed, and torque control for heavy-duty CNC, forming, and multi-axis packaging machinery
• Product Type: Three-Phase AC Synchronous Servo Motor with Integrated Holding Brake
• Key Specs: 30Nm rated torque | 3000rpm nominal speed | 23-bit multi-turn absolute encoder | 24VDC integrated holding brake
• Note: New Original stock; matched ACOPOS P3 / ACOPOSmulti servo drives sold separately

Key Technical Specifications

• Rated Power: 9.42 kW
• Rated Torque: 30 Nm; Peak Torque: 90 Nm
• Nominal Speed: 3000 rpm; Max Mechanical Speed: 4500 rpm
• Mains Compatibility: 3x 230 VAC servo drive supply
• Encoder: 23-bit battery-free multi-turn absolute sin/cos feedback
• Holding Brake: 24 VDC excitation, static holding torque 30 Nm
• Insulation Class: Class F; Continuous Operating Temp: -20°C to +60°C
• Enclosure Rating: IP65 shaft/connector side; IP54 rear housing
• Thermal Time Constant: 18 min natural convection cooling
• Stator Resistance (2-Phase): 0.61 Ω; Stator Inductance (2-Phase): 9.2 mH
• Mechanical Mount: Standard IEC flange, keyed output shaft with tapped end
• Weight: 12.8 kg; Rotor Moment of Inertia: 68.2 kg·cm²
• Connectors: Separate Intercontec circular plugs for power and encoder signals
• Certifications: CE, UL cULus, EAC, RoHS industrial compliance

Product Introduction

This high-torque synchronous servo targets heavy-load automation axes requiring sustained 30Nm output at 3000rpm. The integrated brake eliminates external load locking hardware for vertical Z-axis CNC and press applications.

The unit’s battery-free multi-turn encoder removes encoder backup battery maintenance cycles, while IP65 front sealing resists cutting fluid and airborne workshop particulate without protective motor covers.

QA & Testing SOP (Transparency Building)

1. Incoming Inspection: Cross-reference OEM serial database for genuine hardware validation; inspect shaft keyway for burrs, connector pins for bending, and cast housing for casting defects.
2. Live Testing: Couple the unit to calibrated dynamometer; feed 3x230VAC from matched ACOPOS P3 drive; run 24-hour cyclic load test at 80% rated torque, logging speed ripple and encoder position 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 encoder serial ID via Automation Studio; photograph brake wiring pinout and shaft key orientation for replacement matching.
5. Final QC & Packaging: Apply anti-corrosion oil to output shaft; seal in shock-absorbent ESD shielding crate; attach printed test tag with dynamometer torque curve trace.

Installation Pitfalls & Guide (Engineer to Engineer)

❗ Drive Voltage Mismatch: This motor requires 230V-class ACOPOS drives; pairing with 400V high-voltage servo units creates winding overvoltage and premature insulation breakdown.❗ Brake Polarity Reversal: 24VDC brake wiring swapped polarity prevents brake release, locking the shaft and triggering constant overtorque faults during homing cycles.❗ Shaft Seal Damage During Coupling Installation: Hammer strikes on the motor output shaft crack the front IP65 oil seal, allowing coolant ingress that shorts stator windings. Use only press-fit tooling for couplings.❗ Unshielded Encoder Cable Routing: Running encoder wiring parallel to heavy AC motor power cables induces sin/cos signal noise, generating ±10 count position jitter that ruins contouring accuracy.❗ Unmitigated ESD Exposure: Low-humidity static discharges destroy onboard encoder signal circuitry; wear grounded anti-static wristbands before mating circular encoder connectors.

4-Step Replacement Guide

1. Pre-install: Full machine power down; photograph encoder/power connector pinouts, coupling gap, and brake wiring polarity for exact replication.
2. Removal: Release mechanical coupling fasteners; disconnect circular power and encoder plugs; unbolt flange mounting hardware and extract the unit.
3. Install: Mount new unit to machine flange with specified torque values; press-fit coupling without shaft impact; reattach wiring matching photographed pin assignments.
4. Power-on Test: Enable brake release signal; run slow-speed jog cycles; verify zero encoder position drift and smooth torque response before full production operation.

FAQ (Frequently Asked Questions)

Q: Does the encoder require a backup lithium battery for multi-turn tracking?A: No. This unit uses Wiegand energy harvesting for multi-turn position storage. No periodic battery replacement is needed, eliminating unplanned downtime from dead encoder cells.Q: Can this motor operate continuously at peak 90Nm torque?A: No. Peak torque is limited to short acceleration/deceleration duty cycles (<5% runtime). Sustained operation above 30Nm exceeds Class F insulation thermal limits and shortens winding service life.Q: What drive models fully support the encoder’s sin/cos absolute feedback?A: ACOPOS P3 8EI-series and ACOPOSmulti 8BVI-series servo drives. Older ACOPOS 1045/1090 units lack native multi-turn absolute processing capability.Q: Is the holding brake safe to use as an emergency stop device?A: No. The brake is a static holding mechanism only. It cannot absorb dynamic kinetic energy from moving loads; install separate mechanical E-stop clutches for safety compliance per ISO 13849.Q: What ambient temperature range derates motor continuous torque output?A: Torque derating begins above +45°C cabinet ambient; at +60°C max operating temperature, continuous rated output drops to 78% of nominal 30Nm torque.Q: Can I use generic third-party circular motor cables?A: Physical fit is possible, but uncertified cables lack required EMC shielding and twisted pair geometry. Field testing shows 4x higher encoder noise with non-B&R cabling during high-speed motion.Q: What warranty applies to surplus inventory of the motor?A: Standard 12-month functional warranty covers stator winding, encoder, and brake manufacturing defects; damage from coupling impact, coolant ingress, or reversed brake polarity is excluded from coverage.