B&R 8MSA3M.R0-42

Technical Specifications:

Functional Features:

• Integrated multi-turn absolute encoder eliminates need for reference run after power loss
• Sin/Cos and Hiperface DSL interfaces for high-resolution position feedback
• High dynamic response with low rotor inertia
• Intelligent thermal management with built-in temperature sensor (PTC/KTY)
• Compatible with B&R ACOPOS servo drive series (e.g., 8V1016.00-2, 8V1090.00-2)

Performance Parameters:

• Torque Constant (Kt): 0.22 Nm/A
• Back-EMF Constant (Ke): 22 V/1000 rpm
• Rated Current: 4.2 A
• Peak Current: 12.6 A
• Electrical Time Constant: 3.5 ms
• Mechanical Time Constant: 6.8 ms

Material Composition:

• Stator Laminations: Grain-oriented silicon steel (FeSi), 0.35 mm thickness
• Rotor: High-coercivity permanent magnets (NdFeB, N42SH grade)
• Housing: Aluminum alloy (EN AC-46000), anodized
• Shaft: Hardened alloy steel (C45E), chrome-plated
• Bearings: Deep groove ball bearings, sealed, grease-lubricated (6000 series)
• Connector: M23 connector, gold-plated contacts, IP67 rated

Structural Features:

• Cylindrical housing with integral cooling fan
• Front-side encoder with protective cover
• Keyed shaft with retaining ring groove
• Four mounting bolt holes on flange (M5 thread)
• Cable gland entry (PG11)

Working Principle:
The motor operates on the principle of a permanent magnet synchronous machine (PMSM). The stator windings, energized by a three-phase sinusoidal current from the servo drive, generate a rotating magnetic field. The rotor, equipped with NdFeB permanent magnets, locks to this rotating field and rotates synchronously. The integrated optical encoder provides real-time angular position data to the drive for closed-loop vector control.

Advantages & Highlights:

• Zero-position retention after power-off due to absolute encoder
• High torque-to-inertia ratio for rapid acceleration/deceleration
• IP65 protection suitable for harsh industrial environments
• Wide speed range from 0 to 6000 rpm
• Plug-and-play compatibility with B&R ACOPOS drive ecosystem

Applicable Industries:

• Packaging machinery
• Printing and converting
• CNC machining centers
• Robotics and pick-and-place systems
• Textile machinery
• Food and beverage automation

Installation Requirements:

• Mount on a rigid, flat surface using four M5 bolts, torque 2.5 Nm
• Ensure minimum 50 mm clearance around the motor for airflow
• Use shielded cable for encoder and power connections
• Grounding resistance must be ≤ 1 Ω
• Ambient temperature: -10°C to +55°C

Usage Precautions:

• Do not exceed rated peak current for more than 5 seconds
• Do not disassemble the encoder housing
• Ensure proper cable strain relief at the M23 connector
• Regularly check bearing condition after 10,000 operating hours
• Do not operate in corrosive atmospheres without additional enclosure