Mitsubishi Electric R612CPU-B MELSEC iQ-R Series CPU Module | Replacement, Equivalent & Selection Guide
The Mitsubishi Electric R612CPU-B is a high-performance CPU module from the MELSEC iQ-R Series, designed for demanding industrial automation and motion control applications. This page provides a comprehensive selection guide, compatible replacement models, and sourcing information to help engineers and procurement teams make confident decisions.
Technical Specifications
- Model: R612CPU-B
- Brand: Mitsubishi Electric
- Series: MELSEC iQ-R
- Type: Motion CPU Module (Servo Drive Controller)
- Axes Control: Up to 96 axes (servo/spindle)
- Communication: SSCNETIII/H (high-speed optical network)
- Program Memory: Built-in flash ROM
- Mounting: MELSEC iQ-R base unit compatible
- Power Supply: Supplied via base unit (5 VDC internal bus)
- Operating Temperature: 0 °C to 55 °C
- Standards: CE, UL, cUL, KC
- Country of Origin: Japan
Compatible Replacement & Equivalent Models
The following models are commonly evaluated as functional replacements or upgrades for the R612CPU-B. Always verify electrical and software compatibility before substitution.
- R616CPU-B — Upgraded variant, supports up to 96 axes with enhanced processing speed; direct drop-in for most iQ-R base configurations
- R632CPU-B — Extended motion CPU for larger axis counts; same SSCNETIII/H interface
- R64MTCPU — Legacy MELSEC iQ-R motion CPU; compatible with same servo amplifier network but different firmware ecosystem
- Q172DSCPU — MELSEC Q Series predecessor; requires base unit and software migration (GX Works2 → GX Works3)
- R08CPU / R16CPU — Standard PLC CPUs; suitable only if motion control axes are handled externally via MR-J4/MR-J5 amplifiers with Simple Motion modules
Note: Third-party or aftermarket CPU modules are not recommended for safety-critical motion control systems. Contact Konmask for OEM-sourced units.
Why Choose the Original R612CPU-B
- Factory-validated firmware and motion library compatibility
- Guaranteed interoperability with MR-J4 and MR-J5 servo amplifier series
- Full GX Works3 / MT Works2 engineering software support
- Mitsubishi Electric global warranty and lifecycle support
- Traceable serial number and production batch documentation
Typical Applications
- Multi-axis CNC machining centers and turning centers
- Semiconductor wafer handling and precision positioning
- Automotive body assembly lines and welding robots
- Packaging machinery with synchronized servo axes
- Printing and converting equipment requiring tight registration control
- Electronic component pick-and-place systems
System Compatibility
- Base Units: R35B, R38B, R312B, R38RB (MELSEC iQ-R series)
- Servo Amplifiers: MR-J4-B, MR-J4W-B, MR-J5-B, MR-J5W-B (SSCNETIII/H)
- Engineering Software: GX Works3 (v1.060N or later), MT Works2
- Power Supply Modules: R61P, R62P, R63P, R64P
- Network Modules: RJ71GF11-T2 (CC-Link IE Field), RJ71EN71 (Ethernet)
Selection Guide
Use the following criteria to select the correct CPU module for your application:
- Axis Count: R612CPU-B supports up to 96 axes — confirm your total servo + spindle axis count before ordering
- Network Type: Confirm SSCNETIII/H optical fiber cabling is in place; incompatible with SSCNETIII copper or older SSCNET
- Software Version: Verify GX Works3 project compatibility; older Q-series projects require migration
- Redundancy: For redundant CPU configurations, pair with R6RFM redundancy module on an R38RB base
- Expansion: Plan I/O and network module slots on the base unit before finalizing CPU selection
Quality Assurance & Sourcing
- All units sourced through authorized Mitsubishi Electric distribution channels
- Pre-shipment inspection: visual, functional power-on test, and firmware version verification
- Anti-static packaging with humidity indicator card
- Certificate of conformity and traceability documentation available on request
- Konmask.com maintains stock of both new and factory-refurbished units
How to Order
- Step 1: Confirm part number: R612CPU-B
- Step 2: Specify quantity and required delivery timeline
- Step 3: Request a quotation via [email protected] or call +0086 19859288691
- Step 4: Receive proforma invoice with lead time confirmation
- Step 5: Payment and shipment with full tracking and documentation
Replacement & Compatibility FAQ
Q: Can I replace R612CPU-B with R616CPU-B without reprogramming?
A: In most cases yes — the R616CPU-B is backward compatible at the hardware level, but firmware and MT Works2 project re-validation is recommended.
Q: Is R612CPU-B compatible with older MR-J3 amplifiers?
A: No. MR-J3 uses SSCNET (copper), while R612CPU-B requires SSCNETIII/H (optical fiber). An amplifier upgrade to MR-J4-B or MR-J5-B is required.
Q: Can this CPU run standard PLC ladder logic alongside motion programs?
A: Yes. The R612CPU-B supports both motion SFC/structured text and standard ladder logic within GX Works3.
Q: What is the typical lead time for R612CPU-B?
A: Stock units ship within 3–5 business days. Non-stock orders typically require 4–8 weeks. Contact us for current availability.
Q: Do you provide a warranty?
A: Yes. All new units carry Mitsubishi Electric’s standard warranty. Refurbished units include a 90-day Konmask functional warranty.
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