Mitsubishi MR-J2/J2S to MR-J4 Servo Migration Kits
Upgrade Legacy Servo Systems with Pre-Packaged Migration Kits
Many facilities still rely on Mitsubishi MR-J2 or MR-J2S servo systems to keep critical equipment running. However, as these legacy systems continue to age, replacement parts can become harder to find. As a result, relying on used or refurbished components may increase the risk of unreliable repairs, unexpected downtime, and costly production interruptions.
To help address these challenges, Clayton Controls helps simplify the move to MR-J4 technology with Pre-Packaged Migration Kits for A-Type and B-Type amplifier applications. In addition, these kits are designed to make the upgrade process easier, reduce installation challenges, and support a smoother transition with less disruption to production.
With the right migration kit, you can:
- Reuse existing wiring with conversion cables that help reduce rerouting and rewiring
- Simplify installation with drop-in mounting compatibility
- Support accurate parameter conversion to help maintain system performance
- Plan ahead for aging servo equipment and reduce the risk of unplanned downtime
- Get support from Clayton Controls for kit selection, upgrade planning, startup, and troubleshooting
Simplify MR-J2/J2S to MR-J4 Upgrades with Complete Migration Kits
Clayton Controls helps make MR-J2/J2S to MR-J4 upgrades easier to plan with Mitsubishi Servo Migration Kits built for active production environments. In addition, each kit brings together the components needed to simplify the migration, including pre-packaged hardware, exact-fit amplifier options, conversion cables, and flexible motor planning.
As a result, these kits help reduce wiring changes, shorten installation time, and support accurate parameter setup. This makes it easier to modernize aging servo systems while reducing guesswork, downtime risk, and production interruptions.
Pre-Packaged Convenience
Each kit includes the key components needed for your upgrade, including the amplifier, conversion cables, and motor when required. This helps simplify ordering with one part number and makes inventory planning easier.
Conversion Cables Included
Exact Fit & Mounting Compatibility
Expert Support
Clayton Controls provides guidance for parameter conversion, startup, and troubleshooting to help support a smoother migration. Most support is available at no cost during normal business hours within our APR region.
Fast, Reliable Upgrades
Flexible Motor & Amplifier Options
Complete Mitsubishi Servo Migration Kits for MR-J4 Upgrades
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
The MR-J4-A kit allows you to keep current MR-J2/J2S wiring in place without rerouting or rewiring. This helps reduce installation time, limit wiring errors, and minimize production downtime.
Parameter Conversion for Fast Startup
MR-J2/J2S to MR-J4 parameter conversion is included to help ensure your servo system operates correctly after the upgrade. Pre-configured settings preserve motion profiles and operating parameters, making the transition fast, reliable, and efficient.
Same Size and Mounting Compatibility
MR-J4-A amplifiers match the size and mounting patterns of existing MR-J2/J2S units. This drop-in compatibility helps simplify installation, avoid cabinet modifications, and reduce 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 is pre-configured in MR-J2S compatibility mode, eliminating the need for programming adjustments and allowing the system to operate immediately after installation.
Pre-Configured for MR-J2S Compatibility
Designed to match MR-J2S parameters, the B-Type kit supports a seamless transition to MR-J4 technology without changing existing motion profiles, safety limits, or operating settings.
Quick Swap with Minimal Downtime
A drop-in design and included conversion modules help make amplifier replacement fast and efficient, reducing installation time, minimizing downtime, and keeping production moving.
- 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: Upgrade the amplifier while keeping the existing motor in place, making it easier to plan phased migrations or maintain backup kits.
Motor Replacement Requirement: If a motor is replaced, the matching amplifier must be replaced as well because MR-J4 motors use higher encoder resolution.
Compatibility Assurance: MR-J2/J2S amplifiers cannot read MR-J4 motor feedback, so pairing the correct motor and amplifier helps ensure reliable system performance.
Minimized Downtime: Separate kit options help you plan upgrades more efficiently while reducing disruption to production.
Advanced Control Modes: CP and CL series amplifiers may use specialized positioning methods, including point tables and other modes that do not automatically convert to MR-J4.
Manual Entry May Be Required: Some settings may need to be entered manually on the new MR-J4 amplifier to help preserve existing motion profiles and system behavior.
Our Guidance: Clayton Controls can review your CP/CL unit details and help determine the correct software steps needed for a smoother upgrade.
Why It Matters: Properly addressing CP/CL model requirements helps prevent unexpected behavior, maintain precision, and reduce downtime during migration.
Identify Your MR-J2S Models Before You Upgrade
Confirm your current servo system before planning the move to MR-J4 technology. To make this easier, the complete MR-J2S Motors and Amplifiers list includes compatible models across A, B, CP, and CL series. With this information, you can identify your units, plan the right migration path, and order the correct kit.
Then, download the list to simplify upgrade planning, reduce guesswork, and support a faster, more confident servo migration with less downtime.
Plan Your MR-J4 Migration with Confidence
Clayton Controls can support Mitsubishi MR-J2 and MR-J2S servo migrations across A, B, CP, and CL series. A-Type and B-Type applications are the most common, while CP and CL models may require additional review because of advanced positioning methods or specialized settings.
In many cases, yes. Amplifiers can often be replaced while keeping the existing motor in place, which can support phased upgrades or backup kit planning. However, if the motor is being replaced, the matching amplifier must also be replaced because MR-J4 motors use higher encoder resolution.
No. Mitsubishi Servo Migration Kits include conversion cables that allow you to keep existing wiring in place. This helps reduce rerouting, rewiring, installation time, and potential wiring errors during the upgrade.
Yes. MR-J4 amplifiers are designed to match the size and mounting patterns of existing MR-J2/J2S units. This drop-in compatibility helps simplify installation, avoid cabinet modifications, and reduce downtime.
For A-Type migrations, MR-Configurator2 software converts existing MR-J2/J2S amplifier parameters into the MR-J4 format. If you do not have MR-Configurator2, you can send Clayton Controls your parameter file and our team can complete the conversion for you. For B-Type migrations, the MR-J4-B amplifier comes pre-configured in MR-J2S compatibility mode.
Clayton Controls can help with kit selection, parameter conversion, startup guidance, and troubleshooting. Our team can review your current setup, identify the correct migration kit, and support the technical details needed for a smoother upgrade.
Yes. Migration kits can be ordered for planned upgrades, critical machines, or backup inventory. Because each kit is packaged under a single part number, it is easier to simplify ordering, support spare parts planning, and prepare for aging servo system failures.
Start by identifying your current MR-J2 or MR-J2S amplifier and motor models. Clayton Controls can review your equipment information and help match your system to the correct MR-J4 migration kit for your application.
