MR-J4W2-44B Dual-Axis Servo Amplifier | Mitsubishi 0.4kW | STO Safety

MR-J4W2-44B Mitsubishi Dual-Axis Servo Amplifier

Mitsubishi MR-J4W2-44B runs two servo motors with one compact unit. Each axis delivers 0.4 kW of power. It accepts 1-phase or 3-phase 200-240V AC. Built-in STO safety (Safe Torque Off) meets IEC/EN 61800-5-2. Saves panel space and wiring time.

Key Features

• Two axes in one unit
  • Controls two motors independently
  • Cuts panel space by half
• Power and supply
  • Rated capacity: 0.4 kW per axis
  • Works with 1-phase or 3-phase 200-240V AC
• Safety function
  • STO (Safe Torque Off) per IEC/EN 61800-5-2
  • Stops torque without cutting main power
• Built-in dynamic brake
  • Stops motor fast during emergency
  • Protects load from free fall
• Fast communication
  • SSCNET III/H fiber-optic interface
  • Real-time control for both axes
• Light and compact
  • Weighs only 3.00 lbs (1.36 kg)
  • Easy to mount in small cabinets

Technical Specifications

• Manufacturer
  • Mitsubishi
• Model
  • MR-J4W2-44B
• Product Type
  • Digital AC-Servo Amplifier
• Product Line
  • MELSERVO MR-J4
• Weight
  • 3.00 lbs (1.36 kg)
• Rated Capacity
  • 0.4 kW per axis
• Number of Axes
  • 2 axes
• Safety Function Type
  • STO (IEC/EN 61800-5-2)
• Power Supply (1-phase)
  • 200-240 VAC
• Power Supply (3-phase)
  • 200-240 VAC
• Dynamic Brake
  • Built-in
• Command Interface
  • SSCNET III/H
• Category
  • Servo Products
• Subcategory
  • Servo Drive / Servo Control

Compatible Motors

• HG-KR series
  • 0.1kW to 0.4kW low-inertia motors
• HG-SR series
  • 0.2kW to 0.4kW medium-inertia motors
• MR-J4W2-44B runs two same or different motors

Installation Guide

• Mounting
  • Mount vertically on flat metal panel
  • Leave 10cm above and below for air flow
• Power wiring
  • Connect L1, L2 for 1-phase power
  • Connect L1, L2, L3 for 3-phase power
• Motor wiring
  • Connect Axis 1 motor to M1 terminals
  • Connect Axis 2 motor to M2 terminals
• Grounding
  • Ground the unit to reduce noise

Setup & Maintenance

• Auto-tuning
  • MR Configurator2 tunes both axes together
  • One click for both motors
• Diagnostics
  • LED shows status for each axis separately
  • Alarm codes tell which axis failed
• Firmware
  • Update via SSCNET III/H network
  • No need to remove the unit

Certifications

• CE compliant – Meets EU standards
• UL/cUL listed – For USA and Canada
• STO certified – IEC/EN 61800-5-2

Package Contents

• 1 x MR-J4W2-44B Dual-Axis Servo Amplifier
• 1 x Quick start guide (English)
• 2 x Fiber-optic cables (0.3m each)
• 1 x Terminal label sheet
• 1 x Safety warning sheet

Warranty & Shipping

• Warranty
  • 12-month warranty on parts and workmanship
• Dispatch
  • Orders ship within 12-24 hours
  • Same day if ordered before 2 PM (UTC+8)
• Couriers
  • Choose FedEx, UPS, or DHL at checkout
• Tracking
  • Number sent within 6 hours of dispatch

Expert Review

Senior controls engineer review: The MR-J4W2-44B is a smart space-saver. Two axes in one box means half the panel size. STO safety cuts wiring for safety relays. Built-in brake handles emergency stops well. I use it for small gantries with X and Y axes. SSCNET III/H keeps both axes in perfect sync. No lag between motors. Great for tight budgets and tight cabinets.

Manager’s Insight

Product manager note: Pick the MR-J4W2-44B when you need two axes but have limited space. One unit costs less than two single-axis drives. The 12-month warranty covers both axes fully. For fast delivery, choose DHL for Asia and Europe, FedEx for Americas. Order before 2 PM for 12-hour dispatch. Keep one spare unit – it replaces two drives, so you stock fewer parts.

Typical Applications

• Small gantry robots
  • X and Y axis control in one unit
• Pick-and-place machines
  • Arm and wrist motion together
• Labeling machines
  • Conveyor feed + label head
• Small CNC routers
  • Two axis control for light cutting
• Assembly stations
  • Parts feeder + placement head
• Test equipment
  • Two independent positioners

Frequently Asked Questions (FAQ)

Q: Can I run only one axis on the MR-J4W2-44B?

A: Yes. You can use Axis 1 only and leave Axis 2 disconnected. No alarm will occur.

Q: What is the difference between STO and dynamic brake?

A: STO cuts torque to motor but drive stays on. Dynamic brake shorts motor wires to stop rotation. Use both for safe vertical loads.

Q: My drive shows alarm AL-24 on Axis 2. What does it mean?

A: AL-24 means ground fault on Axis 2 motor cable. Check for wire damage or loose shield connection.

Q: Can I mix 1-phase and 3-phase input on same unit?

A: No. Choose either 1-phase or 3-phase. Do not connect both types at same time.

Q: Does the 12-month warranty cover both axes equally?

A: Yes. Warranty covers the whole unit. If one axis fails, we replace the entire amplifier.

Q: How fast can the SSCNET III/H network run?

A: Cycle time down to 0.222 ms for two axes. Real-time control without delay.

Q: Which courier is fastest for two-day delivery?

A: DHL Express Worldwide for Europe and Asia. FedEx Priority for USA and Canada.

Q: My machine has three axes. Can I use two of these units?

A: Yes. Use one MR-J4W2-44B for two axes and one MR-J4-10B for the third. Daisy-chain via SSCNET III/H.

Q: Does this drive work with HG-KN motors?

A: No. MR-J4W2-44B works with HG-KR and HG-SR series only. Check motor model before ordering.

Q: I need to replace a failed unit quickly. How to get a spare?

A: Order before 2 PM for 12-hour dispatch. Keep one MR-J4W2-44B as cold spare – it replaces two single drives.

Selection Guide – How to Choose

• Step 1 – Count your axes
  • Need two axes? MR-J4W2-44B saves space and cost
  • Each axis handles up to 0.4kW motor
• Step 2 – Check your power
  • Works with 1-phase or 3-phase 200-240V AC
  • No transformer needed within this range
• Step 3 – Verify safety needs
  • STO is built-in – no extra safety module
  • Good for machines that need SIL2 or PL d safety level
• Step 4 – Plan for delivery
  • Order before 2 PM for same-day ship
  • Choose DHL, FedEx, or UPS at checkout
• Step 5 – Use warranty wisely
  • 12 months from invoice date
  • Keep original box for safe return

Contact Information

For inquiries: sales@powergearx.com or +86 18030005825 (WhatsApp)

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