Description
Key Technical Specifications
- Model Number: PW301
- Manufacturer: YOKOGAWA
- Series: Centum XL / CS 3000
- Module Type: Power Supply Module
- Input Voltage: 100-200 VAC
- Style: S4
- Output Frequency: 50-60 Hz
- System Integration: DCS Rack Power Distribution
- Application: Industrial Process Control Systems
- Status: Legacy / Obsolete (Spares Available)
Functional Role & Application Analysis
The YOKOGAWA PW301 serves as a primary power supply module within the Centum XL distributed control system architecture. It solves the critical problem of delivering stable, regulated DC power to backplane modules and I/O cards in harsh industrial environments. This unit converts standard 100-200 VAC mains power into the precise low-voltage DC rails required by sensitive DCS logic and communication boards. Without this module, the entire rack loses power, halting production.
Typical use cases include:
- Primary power distribution in legacy Centum XL DCS racks at refineries and chemical plants.
- Replacement of failed power supplies in aging CS 3000 control systems.
- Maintenance spares inventory for facilities running 20+ year old Yokogawa infrastructure.
- System migration projects where existing PW301 modules must remain operational during phased upgrades.
Our Quality Standard & Testing Process
We understand that the cost of an unreliable power supply is far greater than its purchase price. A failed PW301 can take down an entire DCS rack. We have established a rigorous, multi-stage testing process to ensure every module we ship is 100% functional and meets original equipment specifications.
- Visual & Component Inspection: All parts undergo professional cleaning and visual inspection under magnification. We check for capacitor bulging, corrosion, burnt traces, or compromised solder joints common in aged power modules.
- Live System Test: The module is installed in a live YOKOGAWA test rack and run for a minimum of 24 hours to verify continuous operation, thermal stability, and backplane communication.
- Full-Function Diagnostics: We measure output voltage ripple, load regulation, and overcurrent protection thresholds against factory specifications. We verify AC input tolerance and confirm all status LEDs function correctly.
- Warranty Backing: Only parts that pass all diagnostic tests are approved for shipment and backed by our full 12-month warranty. Test reports with actual voltage readings are available upon request.
YOKOGAWA PW301
Compatibility & Migration Paths
To ensure this PW301 is 100% compatible with your system, you must check these key compatibility points. Power supply mismatches are among the most common and costly mistakes in legacy DCS maintenance.
- Firmware/Hardware Revisions: Confirm your Centum XL rack version supports the PW301 S4 style. Earlier S1-S3 variants may have different pinouts or mounting dimensions. Check your system documentation or send us a photo of your existing module.
- Required Components: This module must be used with compatible Centum XL backplanes and rack enclosures. Verify your rack part number (e.g., ABC11D-H2111) before ordering. The is not interchangeable with PW401 or PW701 without rack modification.
- Replacement & Alternatives: The has been discontinued by YOKOGAWA. If your application allows, the PW302 (220-240V) or PW401 series may serve as drop-in upgrades with proper configuration. For 100-200VAC applications, we can source verified refurbished units or recommend certified third-party equivalents.
- Get Expert Help: Unsure about your system? Contact our technical team today for a free compatibility check. Send us a photo of your existing power module and rack, and we will confirm fitment and recommend the best path forward.
