FANUC A860-0340-T001, also searched as A8600340T001, is a Serial Pulse Coder A for position and speed feedback on selected legacy FANUC S-series and compatible AC servo motors.

GE FANUC identifies A290-0561-V569 as the ordering number corresponding to the A860-0340-T001 encoder nameplate number. A860-0340-T001 remains the primary identification model, while the A290 number is included as an auxiliary parts reference.

A860-0340-T001 Product Specifications

Serial A Position Feedback

Serial Pulse Coder A uses a serial interface and a different operating principle from conventional incremental encoders. FANUC documents approximately one million position divisions per motor revolution and battery-backed position retention when connected to a supported CNC system.

A860-0340-T001 vs. A860-0304-T113

A860-0340-T001 is Serial A, whereas A860-0304-T113 is a 3000P incremental pulse coder with A290-0561-V503 as its ordering reference. Their feedback principles and interfaces differ, so they are not interchangeable.

Compatibility, Testing and Installation

Confirm the complete A06B motor number, A860 encoder label, A290 ordering reference, Serial A designation, connector, cable, mounting and CNC/servo compatibility. Similar housings do not confirm compatibility. REACO CNC checks the label, connector, mechanical condition and serial feedback operation on an applicable FANUC test setup.

Back up machine data and record the original alignment and reference position before replacement. Qualified personnel should verify battery status, feedback direction, motor phase relationship, parameters and reference operation before returning the axis to production.

Related resources: FANUC CNC and robot parts, FANUC servo motors and FANUC encoder and servo repair services.