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AC Servo Amplifier – MITSUBISHI MR-S1-200-E01
The MR-S1-200-E01 is an AC servo amplifier (“AC Servo Amplifier”) from the MELSERVO MR-S1 series by Mitsubishi Electric, with a rated output of 200 W. It is documented as a component of CNC systems equipped with Mitsubishi MELDAS controllers, where it regulates a servo axis in machine tools. The suffix E01 identifies a specific hardware variant of the series; the primary stock code is MRS1200E01.
The servo amplifier is the power and regulation module that closes the position, speed, and current loops on a machine tool axis: it receives the position or speed reference from the CNC and drives the servo motor to ensure positioning accuracy and cycle repeatability. If it fails, the controlled axis goes offline and the machine cannot perform any machining operations; in multi-axis systems, a single faulty drive stops the entire production process.
Mitsubishi Electric is one of the world’s leading manufacturers of industrial automation and power electronics, with the MELSERVO line among the most widely deployed servo drive systems for CNC machine tools. The MR-S1 series has been superseded by later generations (MR-J2S, MR-J3, MR-J4, MR-J5); all products in this family are legacy / discontinued and available exclusively as used, surplus or through specialist repair services.
Main Technical Specifications
| Type | AC Servo Amplifier |
| Part number | MR-S1-200-E01 (MRS1200E01) |
| Brand | Mitsubishi Electric – MELSERVO line |
| Known application | CNC machine tools with Mitsubishi MELDAS control systems |
| Function | Position, speed and current regulation of CNC axis servo motor |
| Rated output power | 200 W |
| Power supply | 200–230 V AC, single phase (typical MR-S1 series) |
| Reference input | Pulse train / analogue ±10 V |
| Feedback | Incremental encoder from Mitsubishi HC/HA series servo motor |
| Connectors | CN1 (CNC command), CN2 (motor encoder), CN3 (digital I/O) |
| Weight | ~1.0–2.0 kg |
| Dimensions | ~150–250 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |