Mitsubishi MR-J2/J2S to MR-J4 Servo Migration Kits
Modernize Legacy Servo Systems with Pre-Packaged Upgrade Kits
If your equipment still relies on Mitsubishi MR-J2 or MR-J2S servo systems, replacement parts are becoming harder to source. Used or refurbished components may provide a temporary fix, but they can also create downtime risk, reliability concerns, and unexpected repair costs.
Rankin Automation helps simplify the move to MR-J4 technology with pre-packaged Mitsubishi Servo Migration Kits for A-Type and B-Type amplifier applications. These kits are designed to reduce upgrade complexity, shorten installation time, and support a smoother transition with less disruption.
With the right migration kit, you can:
- Retain existing wiring with included conversion cables
- Reduce installation time with drop-in mounting compatibility
- Support parameter conversion to help preserve system performance
- Reduce downtime risk by planning upgrades before failure
- Get technical support from Rankin Automation for kit selection, startup, and troubleshooting
Whether you are replacing aging servo components or planning a phased upgrade, Rankin Automation can help identify the right MR-J4 migration path for your application.
All-in-One Migration Kits for Faster, Easier Servo Upgrades
Rankin Automation’s Mitsubishi Servo Migration Kits are built to help manufacturers modernize legacy equipment with less disruption. Each kit combines the components needed to simplify the move from MR-J2/J2S to MR-J4 technology, including exact-fit amplifier options, conversion cables, and support for flexible upgrade planning.
By helping retain existing wiring, reduce installation time, and support accurate parameter setup, these kits make it easier to upgrade aging servo systems while minimizing guesswork, downtime, and production interruptions.
Pre-Packaged Convenience
Get the key components needed for your migration in one streamlined kit, including the amplifier, conversion cables, and motor when required. A single kit helps simplify ordering, planning, and spare parts management.
Conversion Cables Included
Included conversion cables help you keep existing wiring in place, reducing rerouting, rewiring, and potential installation issues during the upgrade.
Exact Fit & Mounting Compatibility
MR-J4 amplifiers are designed to align with existing MR-J2/J2S mounting patterns, helping simplify replacement, reduce mechanical changes, and minimize downtime during installation.
Expert Support
Fast, Reliable Upgrades
Pre-packaged kits and parameter conversion support help streamline the move from MR-J2/J2S to MR-J4, reducing upgrade time and limiting production interruptions.
Flexible Motor & Amplifier Options
Amplifiers can often be replaced separately from the motor, making it easier to plan staged upgrades or keep backup kits on hand. If a motor needs to be replaced, the matching amplifier must also be replaced to maintain proper operation and system performance.
Mitsubishi Servo Migration Kits: Complete Upgrade 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
The MR-J4-A kit allows you to keep current MR-J2/J2S wiring in place, eliminating the need for 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 help preserve motion profiles and operating parameters for a faster, more reliable transition.
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 comes pre-configured in MR-J2S compatibility mode, eliminating the need for programming adjustments and allowing your 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 make it easier to replace aging amplifiers quickly, helping reduce installation time, minimize downtime, and keep production moving efficiently.
- 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 separately from the existing motor, giving you more flexibility for staged upgrades or backup kit planning.
Motor Replacement Requirement: MR-J4 motors cannot be replaced on their own. Because they use higher encoder resolution, the matching amplifier must also be replaced.
Compatibility Assurance: Older MR-J2/J2S amplifiers cannot process MR-J4 motor feedback, so replacing the required components together helps maintain reliable system operation.
Minimized Downtime: Separate kit options make it easier to plan upgrades efficiently, reduce disruption, and keep production moving.
What It Does: MR-Configurator2 software converts existing MR-J2/J2S amplifier parameters into the MR-J4 format, helping ensure the servo system operates correctly after the upgrade.
No License? No Problem: If you do not have access to MR-Configurator2, send Rankin Automation your existing parameter file and our team can complete the conversion for you.
Why It Matters: Accurate parameter conversion helps preserve motion profiles, safety limits, and operating settings, reducing the risk of startup issues, errors, or unexpected downtime.
Ease and Confidence: Whether parameters are converted in-house or with support from Rankin Automation, the process helps make your MR-J4 upgrade smoother, more efficient, and more reliable.
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 manually entered into the new MR-J4 amplifier to help preserve existing motion profiles and system behavior.
Our Guidance: Rankin Automation can gather the details of your CP/CL units and help determine the correct software steps needed for a smoother migration.
Why It Matters: Properly addressing CP/CL model requirements helps avoid unexpected operation, maintain precision, and reduce downtime during the upgrade.
Check Your MR-J2S Models and Plan Your Upgrade
Confirm your current servo system and identify the right path to MR-J4 technology. The complete MR-J2S Motors and Amplifiers list includes compatible models across A, B, CP, and CL series, making it easier to review your existing units, plan your migration, and order the correct kit. Download the list to support faster upgrade planning, reduce guesswork, and help minimize downtime during your servo migration.
Migrate Your Servo System with Confidence
Moving from MR-J2/J2S to MR-J4 technology can bring up important questions around compatibility, wiring, parameter conversion, and installation. Get straightforward guidance to help you select the right migration kit, preserve key system settings, and complete the upgrade with less disruption to your production.
Rankin Automation can support MR-J2 and MR-J2S amplifier migrations across A-Type, B-Type, CP, and CL series. A-Type and B-Type models are the most common, while CP and CL models may require additional migration review or setup adjustments.
In many cases, the amplifier can be replaced separately from the existing motor. However, MR-J4 motors cannot be upgraded on their own without also replacing the matching amplifier because of the higher encoder resolution used with MR-J4 motor feedback.
No. Mitsubishi Servo Migration Kits include conversion cables that allow existing wiring to connect to the new MR-J4 amplifier or motor. This helps reduce rewiring, shorten installation time, and lower the risk of wiring mistakes.
Yes. MR-J4 amplifiers are designed with identical or smaller dimensions and matching mounting locations, allowing for a drop-in replacement that helps reduce cabinet modifications and downtime.
For A-Type kits, MR-Configurator2 software can be used to convert MR-J2/J2S parameters to the MR-J4 format. For B-Type kits, the MR-J4-B amplifier is pre-configured in MR-J2S compatibility mode and typically does not require parameter changes. If you do not have MR-Configurator2, Rankin Automation can help convert your parameter file.
Rankin Automation can provide guidance for kit selection, parameter conversion, installation, startup, and troubleshooting. Most support is available at no cost during normal business hours within our APR region.
Yes. Each migration kit includes the required components under one part number, making it easier to order spare kits for planned upgrades, critical equipment, or unexpected servo failures.
Start by identifying your current MR-J2 or MR-J2S amplifier and motor models. Rankin Automation can review your setup and help match your system to the correct MR-J4 migration kit.
Ready to Plan Your MR-J4 Upgrade?
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