Mitsubishi MR-J2S-100B MELSERVO J2S 1kW SSCNET III/H Servo Amplifier

Mitsubishi Electric MELSERVO J2-Super series MR-J2S-100B is a high‑performance AC servo amplifier for industrial motion control and automation systems. Rated output 1 kW (1000 W) at 200‑230 V AC, three‑phase or single‑phase input. Integrated SSCNET III/H high‑speed fiber‑optic communication interface for synchronized multi‑axis control and flexible system integration. Supports position, speed, and torque control modes with 17‑bit absolute encoder feedback (131,072 pulses/revolution). Built‑in dynamic brake and regenerative resistor. This product is discontinued and available as a spare part for maintaining existing MELSERVO J2S‑based systems. For new installations, the recommended replacement is the MELSERVO‑J4 series (MR‑J4‑100B).

Applications:

• Multi‑axis motion control in automated assembly lines and pick‑and‑place robotics

• CNC machine tools and high‑speed positioning equipment

• Semiconductor manufacturing and precision electronics assembly

• Packaging machinery, labeling equipment, and material handling systems

Technical Specifications:

Core Specifications

• Rated output power: 1 kW (1000 W, 1 HP equivalent)

• Rated output current: approx. 5.6 A (actual value may vary depending on operating conditions)

• Supply voltage: 200‑230 V AC, 50/60 Hz (single‑phase or three‑phase input)

• Control interface: SSCNET III/H (high‑speed fiber‑optic communication)

• Control modes: Position, speed, torque control

• Encoder feedback: 17‑bit absolute/incremental encoder (131,072 pulses/revolution)

• Speed loop frequency response: ≥550 Hz

• Built‑in dynamic brake: yes

• Built‑in regenerative resistor: yes

• Cooling method: Natural convection (fanless)

• Enclosure rating: IP20

Physical Specifications

• Dimensions (W × H × D): 70 mm × 168 mm × 135 mm (approx.)

• Weight: 1.7 kg – 1.8 kg (approx. 3.7 – 3.9 lbs)

• Mounting: Panel mount (base unit mounting)

Protection & Environmental

• Protection functions: Overcurrent shut‑off, regeneration overvoltage shut‑off, overload shut‑off (electronic thermal), servo motor overheat protection, encoder fault protection, undervoltage protection, overspeed protection, excessive error protection

• Ambient operating temperature: 0 °C … +55 °C

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

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

• Altitude: 1,000 m max.

• Vibration resistance: 5.9 m/s² (10 to 55 Hz)

• Certifications: CE, UL, cUL, RoHS

Motor Compatibility:

• Designed for Mitsubishi HC‑KFS series (low inertia) and HC‑MFS series (medium inertia) servo motors.

• Compatible motors: HC‑KFS73 (1 kW), HC‑KFS73B (1 kW with brake), HC‑MFS73 (1 kW medium inertia), and other 1 kW class J2S/J3 series motors with 17‑bit encoder interface.

System Integration:

• This amplifier belongs to the Mitsubishi Electric MELSERVO J2-Super series.

• SSCNET III/H high‑speed fiber‑optic communication interface enables multi‑axis synchronization with Mitsubishi motion controllers (Q17, Q170, Q172, Q173, etc.).

• The MR-J2S-100B can operate in both absolute and incremental encoder modes; in absolute mode, a battery (MR‑BAT6V1SET) is required to retain position data during power‑off.

• For detailed installation, wiring, connector pinout, and parameter setting, refer to the MR-J2S‑B Instruction Manual.

Product Status:
Discontinued. Mitsubishi Electric has discontinued the MELSERVO J2S series. Repair service is no longer available. For legacy system maintenance, this module remains available as a spare part while stocks permit. For new installations, use the recommended successor (MR‑J4‑100B).

Recommended Replacement:

• MR‑J4‑100B: MELSERVO‑J4 series 1 kW servo amplifier with SSCNET III/H fiber‑optic communication, 22‑bit absolute encoder support, advanced vibration suppression control, and one‑touch tuning. Requires complete drive and motor replacement; not directly compatible with existing wiring or control systems without migration considerations.

Related Products:

• Entry level (lower power) → MR‑J2S‑70B (0.75 kW, SSCNET III/H)

• Current model (discontinued) → MR‑J2S‑100B (1 kW, SSCNET III/H)

• Higher power (2 kW) → MR‑J2S‑200B (2 kW, SSCNET III/H)

• Recommended replacement for new designs → MR‑J4‑100B (MELSERVO‑J4 series)

• Battery for absolute encoder → MR‑BAT6V1SET (6V battery set)