Mitsubishi MR-J2S-40CP-S212 MELSERVO J2S Series 400W AC Servo Amplifier with Built-in Positioning Function

Mitsubishi Electric MELSERVO J2S series MR-J2S-40CP-S212 is a compact AC servo amplifier with built-in positioning function for industrial motion control applications. Rated output 400 W at 200‑230 V AC, three‑phase or single‑phase input. Provides position, speed, and torque control modes via pulse train or analog command inputs. Supports absolute or incremental encoder feedback. Built‑in dynamic brake and regenerative resistor. Natural cooling, IP20 enclosure.

Applications:

• Pick‑and‑place robotics and handling systems

• Packaging machinery and labelling equipment

• CNC machine tools and automated assembly lines

• Conveyor control and material handling systems

Technical Specifications:

Core Specifications

• Product series: MELSERVO J2S series

• Rated output power: 400 W (0.4 kW)

• Rated current: 2.8 A (2.6 A or 3.0 A depending on reference)

• Control modes: Position, speed, torque control

• Command input: Pulse train (differential receiver, open collector, line driver) or analog (±10 V DC)

• Feedback system: Incremental or absolute encoder (17‑bit, 131072 pulses/revolution)

• Built‑in functions: Built‑in positioning, auto‑tuning, vibration suppression, electronic cam, mark detection

• Safety function: STO (Safe Torque Off)

Electrical Specifications

• Supply voltage (3‑phase): 200‑230 V AC, 50/60 Hz (permitted fluctuation 170‑253 V AC)

• Supply voltage (1‑phase): 230 V AC, 50/60 Hz (permitted fluctuation 207‑253 V AC)

• Power supply capacity: 0.9 kVA

• Control method: Sine‑wave PWM control

• Brake: Built‑in dynamic brake

• Regenerative braking: Built‑in regenerative resistor

• Main circuit inrush current: 30 A max.

• Control circuit inrush current: 70‑100 A max.

• Capacitor discharge time: 2 minutes

Performance Specifications

• Speed loop frequency response: 550 Hz or higher

• Positioning data points: Up to 31 points (standard 3‑point table, extendable via software)

• Absolute position detection: supported with battery

Environmental & Mechanical Specifications

• Operating temperature: 0 °C … 55 °C

• Storage temperature: –20 °C … +65 °C

• Operating humidity: 10 % … 90 % (non‑condensing)

• Vibration resistance: 5.9 m/s² (0.6 G) at 10 … 55 Hz

• Enclosure rating: IP20

• Cooling method: Natural cooling (fanless)

• Mounting: Panel mount

• Dimensions (W × H × D): 40 mm × 168 mm × 170 mm (approx.)

• Weight: approx. 0.7 – 1.2 kg (depending on reference)

Compatibility information:

• This servo amplifier belongs to the Mitsubishi Electric MELSERVO J2S series.

• Compatible with Mitsubishi AC servo motors: HC‑KFS series (low inertia), HC‑MFS series (medium inertia), HG‑KR series (400 W variants).

• Designed for connection to Mitsubishi motion controllers via pulse train I/O or analog interface.

• Configuration and tuning performed using MR Configurator software via RS‑422/RS‑232C communication port.

Product Status:
Discontinued. Replacement: Mitsubishi MR‑J4‑40B (MELSERVO J4 series). Alternative recommendation: MR‑JE‑40B (MELSERVO JE series) for 400 W applications requiring pulse train positioning.

Related Products:

• MR‑J4‑40B – MELSERVO J4 series 400 W servo amplifier (SSCNET III/H interface)

• MR‑JE‑40B – MELSERVO JE series 400 W servo amplifier with pulse train positioning

• HC‑KFS43 – Low‑inertia AC servo motor, 400 W, with 17‑bit absolute encoder (suitable mating motor)

• HC‑MFS43 – Medium‑inertia AC servo motor, 400 W, with 17‑bit absolute encoder (alternative mating motor)

• MR‑J2S‑40CP – Standard version (without “‑S212” suffix)