Mitsubishi MR-J2S-20B MELSERVO J2S 200W SSCNET III/H Servo Amplifier

Mitsubishi Electric MELSERVO J2‑Super series MR‑J2S‑20B is a high‑performance AC servo amplifier for precise motion control in industrial automation systems. Rated output 200 W (0.2 kW) at 200‑230 V AC, single‑phase or three‑phase input. Built‑in SSCNET III/H high‑speed fiber‑optic communication interface for synchronized multi‑axis control. Supports position, speed, and torque control modes with 17‑bit absolute encoder feedback (131,072 pulses/revolution). This product is discontinued and available as a spare part for maintaining existing MELSERVO J2S‑based systems.

Applications:

• High‑speed positioning for pick‑and‑place robotics and assembly systems

• CNC machine tools and automated production lines

• Packaging machinery and labeling equipment

• Semiconductor and electronics manufacturing equipment

• Material handling systems and small conveyor control

Core Specifications:

• Rated output power: 200 W (0.2 kW)

• Rated output current: 1.6 A

• 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 cooling (fanless)

• Enclosure rating: IP20

• Dimensions (W × H × D): 50 mm × 168 mm × 135 mm

• Weight: approx. 0.7 kg

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

• Storage temperature: –20 °C … 65 °C

Advanced Specifications:

• Maximum input pulse frequency (position control): 500 kpps (differential line driver), 200 kpps (open‑collector)

• Electronic gear: A/B multiplication (A = 1‑65535, B = 1‑65535, 1/50 < A/B < 500)

• Positioning complete width: 0 to ±10,000 pulses (command pulse unit)

• Speed control range: 1:2000 (analog speed command), 1:5000 (internal speed command)

• Analog speed command input: 0 to ±10 V DC / rated speed

• Torque command input: 0 to ±8 V DC

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

• Display: 5‑digit 7‑segment LED display

• Communication: RS‑422 (for parameter setting via MR Configurator)

• Conforms to standards: UL, cUL, CE

Motor Compatibility:

• Compatible with Mitsubishi HC‑KFS series (low inertia) and HC‑MFS series (medium inertia) servo motors

• Compatible motors: HC‑KFS13 (100 W), HC‑KFS23 (200 W), HC‑MFS13 (100 W), HC‑MFS23 (200 W)

• Supports 17‑bit absolute encoder feedback

System Integration:

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

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

• In absolute encoder mode, a battery (MR‑BAT6V1SET) is required for position retention during power‑off.

• Parameter setting and monitoring performed via MR Configurator software using RS‑422 communication.

• For detailed 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 (introduced 1999, discontinued 2015). Repair service ended August 2022. Available as a spare part for maintaining existing MELSERVO J2S‑based systems while stocks permit. For new installations, use the recommended successor (MR‑J4‑20B‑RJ020).

Recommended Replacement:

• MR‑J4‑20B‑RJ020: MELSERVO‑J4 series 200 W servo amplifier with SSCNET III/H fiber‑optic communication, 22‑bit absolute encoder support, advanced vibration suppression control, and one‑touch tuning. Designed for direct drop‑in replacement with MR‑J2S compatibility mode. Requires complete drive and motor replacement; not directly compatible with existing wiring or control systems without migration considerations.

Related Products:

• HC‑KFS23 – 200 W low‑inertia servo motor with 17‑bit absolute encoder

• HC‑MFS23 – 200 W medium‑inertia servo motor with 17‑bit absolute encoder

• MR‑J4‑20B‑RJ020 – Recommended replacement (MELSERVO‑J4 series)

• MR‑BAT6V1SET – Battery for absolute encoder

• MR‑J3ENCBL2M‑A1 – Encoder cable, 2 m (standard bending life)

• MR‑PWS1CBL2M‑A1 – Power cable, 2 m