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MITSUBISHI Servo Drive
Brand: MITSUBISHI -
Code:MR-S12-80A-E01
| Combination name | Availability | Price |
|---|---|---|
CNC Axis Servo Amplifier – Mitsubishi MR-S12-80A-E01
The MR-S12-80A-E01 is an AC servo amplifier for CNC axis drives (“AC Servo Amplifier”) from the MELSERVO MR-S series, manufactured by Mitsubishi Electric. Rated at a continuous output current of 80 A, it is designed to drive AC servo motors on the feed axes of CNC machine tools equipped with a MELDAS controller (M60/M64/M500 series and derivatives). The suffix E01 identifies the specific product variant and revision. Communication with the CNC controller is via a dedicated serial bus (SSCNET) or analogue reference ±10 V; position feedback is handled via an incremental or absolute encoder mounted on the servo motor.
The servo amplifier converts the position and velocity commands from the CNC into power current applied to the servo motor windings, simultaneously closing the current, speed and position loops to ensure faithful tracking of the machining profile. In the event of failure the controlled axis is immobilised or loses positioning accuracy, making any machining operation impossible; in multi-axis systems, the failure of a single drive halts the entire machine.
Mitsubishi Electric is one of the world’s leading manufacturers of motion control and CNC systems, with the MELSERVO division producing AC servo amplifiers and motors for industrial automation and machine tools since the 1980s. The MR-S series is a legacy / discontinued family, superseded by the MR-J2, MR-J3 and MR-J4 generations; spare parts are available exclusively as used, NOS (new old stock) or through specialist repair services.
Main Technical Specifications
| Type | AC Servo Amplifier – CNC axis drive (MELSERVO MR-S series) |
| Part number | MR-S12-80A-E01 (MRS1280AE01) |
| Brand | Mitsubishi Electric – MELSERVO (legacy MR-S series) |
| Known application | CNC machine tools with Mitsubishi MELDAS controller (M60, M64, M64S, M500 series) |
| Function | AC servo motor drive for CNC axis – current, speed and position regulation |
| Rated output current | 80 A |
| Power supply | 3× AC 200–230 V, 50/60 Hz (typical) |
| DC bus voltage | ~280–320 V DC (typical) |
| CNC interface | SSCNET (dedicated serial bus) / analogue reference ±10 V |
| Feedback | Incremental or absolute encoder on servo motor |
| Built-in protections | Overcurrent, overtemperature, DC bus overvoltage, encoder fault |
| Weight | ~4–8 kg |
| Dimensions | ~150×300×200 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
