Product Short Description
Product Introduction:
The 8MSA4S is a compact variant within the B&R 8MSA frame‑4 family, designated “S” for a smaller‑footprint configuration. It delivers moderate torque with 3000 rpm rated speed, designed for applications where space is constrained but more power than frame‑3 motors is needed. Multiple ordering suffixes exist (R0‑30, R0‑31, R0‑32, etc.), each with different feedback, shaft, and brake configurations.
Description
Technical Specifications (representative 8MSA4S.R0‑30 / R0‑31):
|
Parameter
|
Value
|
|---|---|
|
Rated torque
|
0.5 Nm (R0‑30) – 1.27 Nm (R0‑31 variant)
|
|
Rated speed
|
3000 rpm
|
|
Maximum speed
|
4500 rpm
|
|
Voltage range
|
200–240 VAC (3‑phase)
|
|
Weight
|
2.6 kg (R0‑30) – 3.2 kg (R0‑31)
|
|
Shaft diameter
|
14 mm
|
|
Outside diameter
|
131 mm (steel housing, hardness 58–62 HRC)
|
|
Cooling
|
Natural convection (self‑cooling)
|
|
Protection class
|
IP65
|
|
Encoder options
|
Single‑turn absolute (R0‑B5), multi‑turn absolute (various), EnDat (E2/E3 variants)
|
|
Shaft type
|
Smooth shaft (R0‑30), keyed shaft (R0‑31, DIN 5480 spline)
|
|
Connector
|
Hybrid connector (R0‑31, E3‑D2) or M23 (standard)
|
|
Module / gear options
|
Planetary gear (R0‑66), gear ratio 32:1 (R0‑32)
|
|
Gear efficiency
|
≥ 96 % (geared variants)
|
|
Peak torque (geared R0‑32)
|
Approx. 64 Nm
|
|
Compatible drives
|
B&R ACOPOS, ACOPOSmulti, ACOPOS P3
|
Functional Features:
-
Compact frame‑4 design bridges the gap between frame‑3 and larger frame‑4 motors
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Multiple feedback options: single‑turn absolute, multi‑turn absolute, EnDat 2.2
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Geared variants (planetary, 32:1) provide high torque at low speed for direct drive applications
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IP65 protection as standard for industrial environments
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Natural convection cooling – maintenance‑free, no fan
-
Optional planetary gearbox integration (R0‑66) for Lenze servo motor compatibility
Material & Structural Characteristics:
-
Housing: Steel, hardened to 58–62 HRC (R0‑31), providing exceptional rigidity
-
Stator: Silicon steel laminations
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Rotor: NdFeB permanent magnets
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Shaft: Hardened alloy steel, 14 mm diameter, DIN 5480 splined (R0‑31)
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Gearbox (R0‑66): Planetary gear design, module 4, flange mounting
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Bearings: Sealed ball bearings, grease‑lubricated
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Connectors: Rotatable hybrid connector (R0‑31) for flexible cable routing
Working Principle:
Three‑phase permanent‑magnet synchronous motor with absolute encoder feedback. In geared variants, the planetary gearbox steps down speed while multiplying torque (efficiency ≥ 96 %). The drive performs field‑oriented control using encoder position data for closed‑loop precision.
Application Scenarios:
-
Space‑constrained automation cells requiring moderate torque
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Direct‑drive rotary indexing tables (geared R0‑32, R0‑66 variants)
-
Conveyor and feeder drives in packaging lines
-
Robotic joint actuators (especially planetary‑geared versions)
-
Printing press auxiliaries and tension control rolls
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Compatible with Lenze servo motors via R0‑66 planetary gear design
Installation Requirements:
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IEC B5 flange mounting
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For geared variants: ensure gearbox lubrication is maintained per manufacturer schedule
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Use shielded motor and encoder cables
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Grounding resistance ≤ 1 Ω
-
Ensure minimum 50
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