Mitsubishi Q65WRB – MELSEC-Q 5-Slot Redundant Power Supply Base Unit | MELSEC-Q Platform
Engineering Background: The Q65WRB is a dedicated redundant power supply base unit within Mitsubishi Electric’s MELSEC-Q series — one of the most widely deployed high-performance PLC platforms in global industrial automation. Designed for mission-critical applications where uninterrupted power delivery is non-negotiable, the Q65WRB provides a 5-slot rack architecture with dual power supply redundancy, ensuring continuous system operation even during a single power supply failure.
Product Positioning: Targeted at process control engineers, system integrators, and OEM machine builders operating in industries where downtime carries significant operational or safety consequences — including automotive manufacturing, chemical processing, water treatment, and power generation. The Q65WRB is the backbone of fault-tolerant MELSEC-Q control architectures.
Complete Technical Specifications
- Model Number: Q65WRB
- Series / Platform: MELSEC-Q (Mitsubishi Electric)
- Unit Type: Redundant Power Supply Base Unit
- Number of Slots: 5 (for I/O and intelligent function modules)
- Power Supply Configuration: Dual redundant power supply slots (supports simultaneous dual PSU installation)
- Compatible Power Supply Units: Q6-P series redundant power supply modules (e.g., Q63RP, Q64RP)
- Compatible CPU Modules: MELSEC-Q series CPU modules (Q02, Q06, Q13, Q26, Q50, Q100, etc.)
- Backplane Bus: MELSEC-Q high-speed system bus
- Country of Origin: Japan
- Weight: Approx. 940 g
- Compliance: CE, UL, cUL (refer to Mitsubishi Electric official documentation for current certification status)
- Operating Temperature: 0°C to 55°C
- Storage Temperature: -20°C to 75°C
- Relative Humidity: 5% to 95% RH (non-condensing)
- Vibration Resistance: Conforms to JIS B 3502 / IEC 61131-2
- Mounting: DIN rail or direct panel mounting
Proven Application Environments
- Automotive Manufacturing: Body welding lines, paint shop conveyors, and press control systems requiring zero unplanned downtime
- Chemical & Petrochemical Plants: Continuous process control where PSU failure cannot interrupt operations
- Water & Wastewater Treatment: Pump station control and SCADA-integrated PLC racks with redundant power
- Power Generation & Utilities: Substation automation and turbine control panels
- Food & Beverage Processing: High-availability production lines with strict hygiene and uptime requirements
- Semiconductor Fabrication: Cleanroom equipment control with fault-tolerant power architecture
Engineering Advantages
- True Redundant Power: Dual PSU slots allow hot-standby operation — one PSU can fail without any system interruption
- MELSEC-Q Ecosystem Compatibility: Fully compatible with the entire MELSEC-Q module library including I/O, analog, network, and motion modules
- High-Speed Backplane Bus: Supports the MELSEC-Q high-speed bus for deterministic, low-latency inter-module communication
- Compact 5-Slot Form Factor: Optimized for panel space efficiency while maintaining full redundant power capability
- Proven Reliability: Manufactured by Mitsubishi Electric in Japan under ISO 9001-certified production processes
- Long Product Lifecycle: MELSEC-Q platform supported with long-term parts availability and Mitsubishi Electric global service network
System Architecture & Signal Flow
The Q65WRB integrates into a MELSEC-Q redundant power system as follows:
- Slot 0: CPU module (Q-series CPU)
- Slots 1–5: I/O modules, intelligent function modules, or network modules
- PSU Slots (×2): Dual Q6-P series redundant power supply units installed in dedicated PSU bays
- Bus Architecture: All modules communicate via the MELSEC-Q internal high-speed bus; the redundant PSU configuration ensures continuous bus power without switchover delay
- Expansion: Can be used as a main base unit or extension base unit within a multi-rack MELSEC-Q system via extension cables
Sourcing & Quality Verification
- Source: Konmask.com sources Q65WRB units from authorized Mitsubishi Electric distributors and verified industrial surplus channels
- Inspection: Each unit undergoes visual inspection, label verification, and functional pre-shipment checks
- Authenticity: All units are verified against Mitsubishi Electric part number databases; counterfeit units are rejected at intake
- Condition: New (factory-sealed) and refurbished (tested, cleaned, re-certified) options available — specify at inquiry
- Documentation: Original Mitsubishi Electric datasheets and hardware manuals available upon request
Procurement Process
- Submit Inquiry: Contact [email protected] with your required quantity, delivery timeline, and destination country
- Quotation: Receive a formal quotation within 1 business day including unit price, shipping cost, and lead time
- Order Confirmation: Confirm purchase order; payment via T/T bank transfer, PayPal, or credit card
- Quality Check & Packing: Unit inspected, photographed, and packed in anti-static ESD packaging with foam protection
- Shipment: Dispatched via DHL / FedEx / UPS with full tracking; export documentation provided for international orders
- After-Sales Support: 12-month warranty on new units; 90-day warranty on refurbished units; technical support available
Technical FAQ
Q: Can the Q65WRB be used as an extension base unit?
A: Yes. The Q65WRB can function as both a main base unit and an extension base unit within a MELSEC-Q multi-rack configuration, connected via Mitsubishi Electric extension cables.
Q: What power supply modules are compatible with the Q65WRB?
A: The Q65WRB is designed for use with Mitsubishi Electric Q6-P series redundant power supply modules. Standard Q-series PSUs (non-redundant) are not compatible with this base unit.
Q: Is the Q65WRB compatible with MELSEC iQ-R series modules?
A: No. The Q65WRB is specific to the MELSEC-Q platform. MELSEC iQ-R modules use a different base unit form factor and are not interchangeable.
Q: What is the maximum number of I/O points supported?
A: The number of I/O points depends on the CPU module and I/O modules installed. The Q65WRB provides 5 module slots; total I/O capacity is determined by the specific modules fitted. Refer to the MELSEC-Q System Manual (SH-080483) for detailed configuration guidelines.
Q: Do you provide export documentation for international shipments?
A: Yes. Konmask.com provides commercial invoices, packing lists, and certificates of origin for all international orders. HS Code: 8537.10 (programmable controllers and associated base units).
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