Mitsubishi Servo Migration Kits
Mitsubishi Servo Migration Kits: MR-J2/J2S to MR-J4
Upgrade Your Legacy Servo Systems with Pre-Packaged Migration Kits
If your production lines still rely on MR-J2 or MR-J2S servo systems, you’re not alone. These units were discontinued over a decade ago, and sourcing replacements from used equipment resellers can introduce unknown risks, unexpected downtime, and costly failures.
Butler & Land simplifies the upgrade with pre-packaged migration kits for A-Type and B-Type amplifiers, designed to make your upgrade fast, reliable, and stress-free.
Our kits allow you to:
- Keep your existing wiring intact – no rerouting required
- Minimize installation time – drop-in replacement with identical mounting
- Convert parameters quickly and accurately – get your system up and running efficiently
Migrate safely and confidently with Butler & Land, your trusted partner for Mitsubishi servo upgrades
All-in-One Migration Kits for Faster, Smarter Servo Upgrades
Our Mitsubishi servo migration kits are designed with your production in mind. From pre-packaged components to exact-fit amplifiers and flexible motor options, every kit simplifies the upgrade process, reduces downtime, and keeps your lines running smoothly. With conversion cables that preserve existing wiring and expert support for parameter setup, you can migrate from MR-J2/J2S to MR-J4 with confidence and efficiency, avoiding guesswork and minimizing production interruptions.
Pre-Packaged Convenience
Each kit contains everything you need – amplifier, motor (if required), and all conversion cables – so you can order a single part number and simplify inventory management.
Conversion Cables Included
Keep your existing wiring intact. No rerouting or rewiring required, saving time and reducing installation errors.
Exact Fit & Mounting Compatibility
MR-J4 amplifiers match the mounting patterns of your old MR-J2/J2S units, ensuring a drop-in replacement and minimal downtime.
Expert Support
Our team provides guidance for parameter conversion, startup, and troubleshooting. Most support is free during normal business hours within our APR region.
Fast, Reliable Upgrades
Pre-configured kits and parameter conversion tools allow you to go from old to new quickly, minimizing production interruptions.
Flexible Motor & Amplifier Options
Amplifiers can be replaced independently of motors, allowing for staged upgrades or backup kits. Motors cannot be replaced on their own; any motor replacement always requires replacing the corresponding amplifier to maintain proper operation and system performance.
Our Servo Migration Kits: All-In-One Solutions
A-Type Amplifier Kit: MR-J4-A
- Servo Amplifier
- Encoder Conversion Cable
- I/O Conversion Cable (I/O cable require external 24VDC)
- Monitor Conversion Cable
- Use Your Existing Wiring
Keep your current MR-J2/J2S wiring intact with the MR-J4-A kit. No rerouting or rewiring is required, saving installation time, reducing errors, and minimizing production downtime. - Parameter Conversion Included for Fast Startup
The kit includes MR-J2/J2S to MR-J4 parameter conversion, ensuring your servo system operates correctly immediately. Pre-configured settings preserve motion profiles and operational parameters, making the upgrade fast, reliable, and efficient. - Same Dimensions & Mounting as Old Amplifiers
MR-J4-A amplifiers match the size and mounting patterns of your existing MR-J2/J2S units. This drop-in compatibility simplifies installation, prevents cabinet modifications, and reduces overall downtime for industrial automation systems.
- Upload parameters from old amplifier
- Replace old amplifier with new amplifier in the cabinet
- Connect existing cables to new conversion cables
- Download converted parameters to new amplifier
- Power up amplifier
- Ready for operation
- Upload parameters from old servo amplifier
- Convert parameters (Full detail instructions will be provided)
- Disconnect existing cables from old servo amplifier and remove amplifier from cabinet (Make sure existing cables are labeled appropriately (they will be reconnected to new amplifier)
- Mount MR-J4 amplifier in the cabinet (MR-J4 amplifiers have the same dimensions for mounting)
- Connect IO, Encoder, and Monitor conversion cables to the MR-J4-A amplifier
- Connect existing cables to their respective conversion cables
- (If using on-board IO) – Connect 24VDC to the 2-pin (red/white) breakout connector on IO conversion cable
- Power up new MR-J4-A amplifier
- Download the converted parameters to the new MR-J4-A amplifier
- Cycle power on MR-J4-A amplifier
- Home servo amplifier
- Ready to begin normal operation
B-Type Amplifier Kit: MR-J4-B
- Servo Amplifier
- Encoder Conversion Cable
- I/O Conversion Cable (I/O cable require external 24VDC)
- Network Conversion Module
- No Program Changes Required
The MR-J4-B amplifier comes pre-configured in MR-J2S compatibility mode. This eliminates the need for any programming adjustments, allowing your system to operate immediately after installation. - Pre-Configured for MR-J2S Compatibility
Designed specifically to match MR-J2S parameters, the B-Type kit ensures a seamless transition to MR-J4 without altering your existing motion profiles, safety limits, or operational settings. - Quick Swap with Minimal Downtime
Drop-in design and conversion modules allow a fast replacement of old amplifiers. This reduces installation time and keeps production lines running smoothly, minimizing downtime and maintaining efficiency in industrial operations.
- Attach SSCNET adapter module to the side of the new amplifier
- Replace old amplifier with new amplifier in the cabinet
- Connect existing cables to new conversion cables
- Power up amplifier
- Ready for operation
- Disconnect existing cables from old servo amplifier and remove amplifier from cabinet (Make sure existing cables are labeled appropriately [they will be reconnected to new amplifier])
- Attach the SSCNET adapter module to the side of the MR-J4-B amplifier (The male socket on the side of the SSCNET module connects to the female socket on the side of the amplifier)
- Mount MR-J4-B amplifier in the cabinet (MR-J4-B amplifiers + adapter module have the same dimensions for mounting )
- Connect IO, Encoder, and Monitor conversion cables to the MR-J4-B amplifier (if using)
- Connect existing cables to their respective conversion cables
- (If using on-board IO) – Connect 24VDC to the 2-pin (red/white) breakout connector on IO conversion cable
- Power up new MR-J4-B amplifier
- Home servo amplifier
- Ready to begin normal operation
Technical Considerations for Migration Kits
- Flexible Upgrades: Replace the amplifier independently of your existing motor, allowing staged upgrades or backup kits.
- Motor Replacement Requirement: You cannot replace a motor without also replacing the amplifier due to the higher encoder resolution of MR‑J4 motors.
- Compatibility Assurance: Older MR‑J2/J2S amplifiers cannot process the MR‑J4 motor’s feedback; this ensures your system operates reliably.
- Minimized Downtime: Separate kits let you plan upgrades efficiently while keeping production running smoothly.
- What It Does: MR‑Configurator2 software converts your old MR‑J2/J2S amplifier parameters to the new MR‑J4 format, ensuring your servo system operates correctly after the upgrade.
- No License? No Problem: If you don’t have MR‑Configurator2, you can send us your existing parameter file, and our team will perform the conversion for you.
- Why It Matters: Proper parameter conversion preserves your system’s motion profiles, safety limits, and operational settings, avoiding unexpected downtime or errors.
- Ease and Confidence: Whether you convert parameters in-house or through Butler & Land, the process is streamlined so your MR‑J4 upgrade is smooth and reliable.
- Advanced Control Modes: CP and CL series amplifiers include specialized positioning methods, such as point tables and other modes that are not automatically converted to MR‑J4.
- Manual Entry May Be Required: Certain settings may need to be manually configured on the new MR‑J4 amplifier to preserve your system’s motion profiles.
- Our Guidance: Butler & Land will gather information about your CP/CL units to determine the exact software steps needed, ensuring a smooth upgrade.
- Why It Matters: Proper handling of CP/CL models avoids unexpected behavior, maintains precision, and minimizes downtime during your migration.
Check Your MR-J2S Models and Plan Your Upgrade
Make sure your servo system is eligible for a smooth MR-J4 upgrade. Our complete MR-J2S Motors and Amplifiers list shows all compatible models across A, B, CP, and CL series. Download the list to identify your units, plan your migration, and simplify ordering the correct migration kit. Keeping this list on hand ensures faster, more confident upgrades and reduces downtime.
Migrate Your Servo System with Confidence
Upgrading from MR-J2/J2S to MR-J4 raises important questions about compatibility, wiring, and installation. Find clear, actionable answers to help you choose the right kit, convert parameters accurately, and complete your upgrade efficiently, so your production stays online and your migration is smooth.
Our migration kits cover all MR-J2 and MR-J2S amplifier types, including A-Type, B-Type, CP, and CL series. The A and B models are the most common, but we can support CP and CL models as well with minor adjustments during migration.
You can replace the amplifier independently of the motor, but the motor cannot be upgraded without also replacing the amplifier. This is due to the higher encoder resolution of the J4 motor, which requires a compatible amplifier.
No. All our kits include conversion cables that let you connect your existing wiring to the new MR-J4 amplifier or motor. This minimizes installation time and reduces the risk of wiring errors.
Yes. MR-J4 amplifiers have identical or smaller dimensions and the same mounting locations, allowing a drop-in replacement with minimal downtime.
The MR-J4-B kits are pre-configured in MR-J2S compatibility mode and typically require no parameter changes. For A-Type kits, you can use MR-Configurator2 software to convert parameters. If you don’t have a license, you can send us your parameter file and we’ll convert it for you.
Our expert team provides guidance for parameter conversion, installation, and startup. Most support is free during normal business hours within our APR region.
Absolutely. Each kit comes with all required components packaged under one part number, making it easy to keep spare kits on hand for planned upgrades or unexpected failures.
Download our MR-J2S Motors and Amplifiers list to identify your units, then request a quote for the corresponding migration kit. Our team can also guide you to ensure you select the correct kit for your system.
