ABB 1MRB150083R1F / 216EA62 – Servo Motor Feedback Assembly for precise motion on IRB and ACS-driven axes

The 1MRB150083R1F paired with 216EA62 is commonly supplied as an ABB motor-mounted feedback/encoder assembly, used to deliver accurate position feedback to ACS-series drives and IRB robot axes. From my experience, this unit is typically a drop-in replacement for selected ABB servo motor frames, helping maintenance teams restore positioning accuracy without re-engineering the system.

You might notice that sites running pick-and-place, arc welding, or palletizing cells keep a spare of this model on hand. The reason is simple: fast swap, consistent encoder alignment, and predictable compatibility with ABB motion control.

• Form-fit-function replacement – 1MRB150083R1F (assembly) with 216EA62 (feedback element) is designed to mount on specific ABB motor frames with no machining.

• High-resolution feedback – Supports smooth velocity control and tight path accuracy; in many cases this directly improves cycle-to-cycle repeatability.

• Signal compatibility – Typically resolver or incremental differential (A/B/Z) feedback for ABB ACS/DSQC control—confirm signal type before ordering.

• Industrial build – Robust housing and sealed connectors help the unit tolerate dust, oil mist, and vibration common in robot bases and machine frames.

• Fast turnaround maintenance – Factory indexed components reduce alignment time; technicians can usually replace and re-reference the axis during a short stop.

• Traceable part coding – Clear model and revision labeling assist with BOM matching across IRB families and motor variants.

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This model appears most frequently in ABB robotics and motion applications where precision and uptime matter. Typical deployments include:

• IRB robot axes for material handling, palletizing, and machine tending

• Automotive body-in-white fixtures and spot/arc welding cells

• Packaging and pallet cell conveyors driven by ABB ACS controllers

• General-purpose servo retrofits where ABB motors are retained

Feedback from a packaging customer: “Swapping the 1MRB…R1F kit with the 216EA62 head cut our changeover time to under 30 minutes, and the axis tuned cleanly on the first pass.”

• Risk reduction – Matching the ABB-coded model typically avoids pinout surprises and re-qualification on safety-rated cells.

• Shorter downtime – Pre-aligned hardware and familiar connectors help maintenance return a line to service quickly.

• Lifecycle compatibility – Works with established ABB drives and DSQC feedback modules, a practical choice for brownfield sites.

• Total cost – Fewer engineering hours and no mechanical rework often outweigh the unit price, especially in multi-robot plants.

• Technical support – Documentation and parameter references are widely available for ABB service personnel.

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• Environment – Mount in a clean, dry area of the motor endbell; ensure cabinet wiring uses shielded twisted pairs with proper drain/earth bonding.

• Alignment – Use the motor’s alignment marks/indexing tool; avoid forcing the coupling. Incorrect phasing can cause drive faults or oscillation.

• Ventilation – Keep the motor area free of built-up oil/dust; heat soak can affect sensor stability in extreme cases.

• Wiring – Route feedback cables away from VFD motor leads; maintain separation and use ferrules on terminal blocks to prevent whiskers.

• Safety – Lockout/tagout the drive, discharge DC bus, and follow ESD precautions when handling the feedback element.

• Routine checks – Inspect connector seals and cable strain relief quarterly; verify encoder counts per rev and direction during scheduled calibration.

• Firmware and tuning – After replacement, run the drive’s identification/tuning routine and confirm resolver/encoder parameters match the motor nameplate.

• CE and RoHS compliance typical for ABB feedback components

• Manufactured under ISO 9001 quality systems

• UL recognition may apply to associated assemblies; check your exact revision code

• Standard manufacturer warranty (commonly 12 months) against defects when installed per guidelines