B&R 8MSA3L.R0-30 3-Phase Servo Motor

Description

Key Technical Specifications

The 3,000 rpm, 0.68 kW, 2.15 Nm, 10 Nm maximum-torque, 3.2 kg, and ACOPOS 1022 data are supported by independent engineering documentation.

Important specification warning: online distributor records contain conflicting values for this exact part number. One current listing, for example, reports 0.25 Nm and 18 g, which is incompatible with the engineering documentation and other B&R records for an 8MSA3L size-3 motor. Do not use that listing for drive sizing.

For replacement procurement, the motor nameplate, resolver configuration, mechanical dimensions, and original machine documentation should take precedence over generic reseller specifications.

Product Introduction

The B&R 8MSA3L.R0-30 is a size-3, three-phase synchronous servo motor in the B&R 8MS family. It is rated at 3,000 rpm and approximately 0.68 kW, with R0 resolver feedback for closed-loop motion control. Published engineering documentation identifies it with the ACOPOS 1022 servo amplifier family.

The R0 resolver configuration is particularly relevant when maintaining older B&R motion systems. The motor’s published 12,000 rpm maximum speed and 10 Nm peak torque capability provide substantial dynamic range, but the actual permissible operating point remains dependent on the matched ACOPOS drive, machine mechanics, duty cycle, and thermal conditions.

8MSA3L.R0-30

8MSA3L.R0-30

Installation & Configuration Guide

Stage 1 — Pre-Installation

Estimated time: 30–60 minutes

1. Place the machine in a controlled maintenance state and notify affected operators.
2. Apply LOTO to the servo power supply and verify that the DC bus has discharged.
3. Record the existing motor’s:
   • Nameplate data
   • Resolver connector arrangement
   • Motor cable routing
   • Shaft/coupling position
   • Mechanical mounting orientation
4. Back up the machine project and motion parameters before disconnecting the existing motor.
5. Inspect the replacement for shipping damage, shaft damage, connector damage, contamination, and signs of moisture exposure.

⚠️ Do not energize the motor simply to confirm that it rotates. The resolver feedback, drive parameters, mechanical load, and commanded direction must all be verified first.

Stage 2 — Remove the Existing Motor

Estimated time: 30–60 minutes

1. Confirm electrical isolation with an appropriate meter.
2. Disconnect the motor power and resolver connections without pulling on the cable.
3. Mark the cable orientation and connector positions.
4. Release the mechanical coupling or belt connection.
5. Support the motor before removing its mounting hardware.
6. Remove the motor while preventing the shaft from carrying external radial or axial loads.

Keep the removed motor available until the replacement has passed commissioning. It can provide valuable dimensional and connector references if the machine documentation is incomplete.

Stage 3 — Install the 8MSA3L.R0-30

Estimated time: 45–90 minutes

1. Compare the replacement nameplate against the removed unit.
2. Confirm that the 8MSA3L.R0-30 R0 resolver configuration matches the machine’s original feedback system.
3. Install the motor without forcing the shaft into the coupling.
4. Align the motor and driven mechanism according to the machine manufacturer’s mechanical tolerances.
5. Tighten mounting hardware to the machine/OEM torque specification.
6. Connect the motor cable and resolver connection.
7. Verify cable shielding, grounding, bend radius, and strain relief.
8. Confirm that no mechanical load is being applied to the shaft during initial electrical checks.

⚠️ Do not substitute an EnDat/encoder motor for an R0 resolver motor simply because the mechanical housing appears identical. Feedback technology is part of the servo-system interface.

Stage 4 — Power-On and Testing

Estimated time: 30–90 minutes

1. Verify the ACOPOS drive configuration before enabling the power stage.
2. Confirm that the drive identifies the intended motor/feedback configuration.
3. Check resolver feedback while the motor is stationary.
4. Perform a controlled low-speed jog with the machine unloaded where practical.
5. Verify commanded direction against actual shaft direction.
6. Check motor current, following error, resolver feedback, acceleration, and abnormal vibration.
7. Increase speed gradually toward the required operating point.
8. Run the machine through a representative production cycle.
9. Monitor motor temperature and drive diagnostics during the first extended run.

A published engineering project specifically pairs the 8MSA3L.R0-30 with an ACOPOS 8V1022.00-2, including a documented torque constant of 1.39 Nm/A and motor inertia data.

FAQ

Is the B&R 8MSA3L.R0-30 still manufactured?

Available distributor documentation identifies the model as discontinued by the manufacturer. It is therefore primarily a legacy replacement and spare-parts procurement item.

What feedback system does the 8MSA3L.R0-30 use?

The R0 designation identifies the resolver version in available B&R-related documentation. This should be confirmed against the actual motor nameplate before replacement.

What are the key performance ratings?

Published engineering documentation gives 3,000 rpm rated speed, 0.68 kW rated power, 2.15 Nm rated torque, and 10 Nm maximum torque.

Can I replace it with another 8MSA3L motor?

Not automatically. The feedback type, winding/speed variant, mechanical configuration, brake arrangement, connector arrangement, and ACOPOS drive compatibility must all be checked. A visually similar 8MSA3L variant is not necessarily an electrical substitute.

Does replacing the motor require PLC program changes?

Normally, replacing an identical motor does not mean rewriting the PLC motion program. However, drive configuration, feedback parameters, motor identification, axis scaling, and direction must be verified before returning the machine to production.

Is the 8MSA3L.R0-30 available as a used or refurbished spare?

Yes. Current industrial surplus listings show this exact model in used inventory, while Radwell lists unused and refurbished condition categories. Condition, testing documentation, and actual nameplate revision should be confirmed before purchase.

What should procurement verify before ordering?

Provide the supplier with the complete 8MSA3L.R0-30 part number, machine application, existing motor nameplate photograph, resolver configuration, brake requirement if applicable, and preferred condition. This reduces the risk of receiving a mechanically similar but electrically incompatible 8MS motor.