Mitsubishi OSA253S2 25,000 PPR Absolute Servo Encoder

Mitsubishi OSA253S2 is an A33 absolute-position servo motor encoder with a resolution of 25,000 pulses per revolution (PPR). It provides position and speed feedback on selected Mitsubishi Electric servo motors used in CNC machine tools and industrial automation equipment.

The OSA253S2 is documented for compatible HC, HC-R and HA-N servo motor configurations marked A33 within the Mitsubishi MELDAS MDS-B-SVJ2 servo system. Always confirm the complete motor nameplate, detector suffix, connector, mounting interface and original encoder model before replacement.

OSA253S2 Product Specifications

Absolute Servo Feedback Function

The OSA253S2 sends absolute position feedback to the servo control system, supporting repeatable machine positioning after correct installation and setup. Replacement may be required after encoder alarms, unstable feedback, physical damage, contamination or detector failure.

OSA253S2 vs. OSE253S2

OSA253S2 is an absolute A33 detector, while OSE253S2 is an incremental E33 detector. Both are rated at 25,000 pulses per revolution, but they are different feedback types and should not be assumed interchangeable. Verify an -A33 motor suffix and the OSA253S2 label before installation.

Compatibility and Installation Checks

Compare the complete servo motor model, encoder label, connector, cable arrangement and mounting details. Installation should be performed by qualified personnel. Absolute-position initialization, reference return or parameter verification may be required according to the machine and controller configuration.

Related resources: Mitsubishi servo encoders and Mitsubishi CNC and servo repair services.