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Copy| Product Name | ABB 3HAC046277-001 Serial Measurement Unit with RMU101 SMB |
| Item NO. | 2930445 |
| Weight | 0.1 kg = 0.2205 lb = 3.5274 oz |
| Category | ABB |
| Brand | ABB |
| Creation Time | 2026-11-06 |
ABB 3HAC046277-001 is a serial measurement unit used in ABB robot measurement systems to collect resolver position data and preserve axis revolution information for the robot controller. Its RMU101 serial measurement board and dedicated battery form the local measurement record that remains available when main controller power is removed.
Resolver leads from the robot axes terminate at ABB 3HAC046277-001, where the measurement board converts the resolver relationships into serial position data for the controller. The unit therefore links mechanical axis position, stored revolution counts and the controller's motion model instead of acting as a general-purpose I/O assembly.
During service, ABB 3HAC046277-001 is handled as one measurement chain comprising the enclosure, RMU101 board, 3HAC044075-001 battery and axis harnesses. Connector identity is retained during transfer, and the revolution counters are updated only after the replacement unit and physical robot axes have been reconciled.
| Technical item | Specification |
|---|---|
| Brand | ABB |
| Model | 3HAC046277-001 |
| Product name | Serial Measurement Unit with RMU101 SMB |
| Country | Sweden / Switzerland |
| System role | Axis resolver measurement and revolution storage |
| Measurement board | RMU101 3HAC044168-001 |
| Battery | Lithium battery pack 3HAC044075-001 |
| Input path | Robot-axis resolver harnesses |
| Output path | Serial measurement data to robot controller |
| Stored record | Axis revolution counters |
| Service boundary | Complete measurement unit and identified harnesses |
| Commissioning | Update revolution counters after verified replacement |
ABB 3HAC046277-001 keeps the physical axes and the controller's position model connected through one battery-backed measurement path.
Each resolver reports shaft angle to the RMU101 board. The board groups those signals into the serial position record consumed by the motion controller, so a disturbed connector can be distinguished from a mechanical axis movement.
The battery-backed memory preserves revolution counts while cabinet power is absent. Those counts give the controller the coarse multi-turn position that complements the resolver's position within one revolution.
After power returns, the unit sends measured axis data to the robot controller. Motion is accepted only when the stored counts, resolver signals and configured mechanical-unit record describe the same physical axes.
Service checks on ABB 3HAC046277-001 separate battery, connector and calibration conditions before robot motion is enabled.
A battery warning is treated as a storage-path issue rather than an immediate resolver failure. Replace the battery under the specified procedure so the stored revolution relationship is not lost unnecessarily.
Inspect every resolver and controller connector for its original position, locking feature and cable support. A crossed axis connector can produce coherent electrical data for the wrong mechanical axis.
After replacement, update the revolution counters at the robot's known calibration positions and compare displayed axis values with the physical marks before permitting automatic operation.
For ABB 3HAC046277-001, check the battery record and replace it under controlled power conditions before updating any revolution counter.
For ABB 3HAC046277-001, label every connector by axis and reconnect it to the same RMU101 position before power-up.
For ABB 3HAC046277-001, place the robot at its calibration references and update only the affected counters after the resolver path is verified.
For ABB 3HAC046277-001, compare several stationary axis readings and inspect the common serial-measurement path before disturbing the motor.
For ABB 3HAC046277-001, confirm connector locking, battery status, calibration marks and displayed axis values in manual mode.
For ABB 3HAC046277-001, keep the complete 3HAC046277-001 unit identity with its RMU101 board, battery and robot serial information.
Moore Automation keeps robot measurement-unit identifiers, supporting photographs and destination details associated with the same enquiry so a battery, board or complete unit request is not confused.
Moore Automation Sales Team
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