YOKOGAWA PW302 S4 – 220-240V AC Power Supply Module | CENTUM CS/VP DCS Platform
Engineering Background
The YOKOGAWA PW302 S4 is a field-proven AC power supply module designed for the CENTUM CS and CENTUM VP Distributed Control System (DCS) platforms — YOKOGAWA’s flagship process automation architecture deployed across refining, petrochemical, power generation, and pharmaceutical industries worldwide. The S4 suffix designates the 220–240V AC input variant, optimized for international grid standards.
Product Positioning
As the backbone of DCS cabinet power distribution, the PW302 S4 delivers regulated, isolated DC power to field control stations (FCS), I/O modules, and communication buses. Its redundant-capable architecture ensures zero-interruption operation in safety-critical environments where unplanned downtime carries six-figure hourly costs. Procurement engineers specify this module when replacing aging power infrastructure or expanding existing CENTUM installations.
Complete Technical Specifications
| Part Number | PW302 S4 |
| Manufacturer | YOKOGAWA Electric Corporation |
| Module Type | AC/DC Power Supply Module |
| Input Voltage | 220–240V AC, 50/60 Hz |
| Output Voltage | 24V DC (regulated) |
| Compatible Platform | CENTUM CS 1000 / CS 3000 / VP |
| Mounting | DIN rail / cabinet backplane |
| Redundancy Support | Yes – dual-module hot-standby capable |
| Protection Class | Overvoltage, overcurrent, short-circuit |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -25°C to +70°C |
| Humidity | 5–95% RH (non-condensing) |
| Weight | 3.6 kg |
| Approvals | CE, UL (refer to YOKOGAWA datasheet for full certification list) |
Proven Application Environments
- Oil & Gas: Upstream wellhead control, midstream pipeline SCADA, downstream refinery DCS cabinets
- Petrochemical: Reactor control systems, distillation column automation, safety instrumented systems (SIS) power backup
- Power Generation: Turbine governor control, boiler management systems, grid-tie automation panels
- Pharmaceutical: GMP-compliant batch control, clean-room environmental monitoring systems
- Pulp & Paper / Water Treatment: Continuous process control requiring 24/7 uptime with redundant power
Engineering Advantages
- Hot-Swap Redundancy: Dual PW302 modules can operate in parallel; one can be replaced without shutting down the control system
- Wide Input Tolerance: Accepts 220–240V AC ±10%, accommodating grid fluctuations common in industrial facilities
- Galvanic Isolation: Full isolation between AC input and DC output protects sensitive I/O modules from grid transients
- Compact Form Factor: Designed for high-density cabinet integration within CENTUM standard enclosures
- Long Service Life: Industrial-grade capacitors and thermal management rated for continuous 24/7 operation
- Direct OEM Compatibility: Plug-and-play replacement for existing CENTUM CS/VP installations — no firmware changes required
System Architecture & Signal Flow
In a typical CENTUM VP field control station, the PW302 S4 receives 220–240V AC from the facility’s UPS-backed distribution panel. It converts and regulates this to 24V DC, which is distributed via the cabinet backplane to:
- Field Control Station (FCS) processor cards
- Analog and digital I/O modules (AAI, ADV, ADA series)
- Vnet/IP communication interface modules
- Fieldbus interface modules (FOUNDATION Fieldbus, HART)
When configured in redundant mode, a second PW302 S4 monitors the primary unit’s output. On fault detection, load transfer occurs within milliseconds — transparent to the control system and field devices.
Sourcing & Quality Verification
- Origin: Sourced from authorized YOKOGAWA distributors and verified industrial surplus channels
- Inspection Protocol: Each unit undergoes visual inspection, label/serial verification, and functional power-on test prior to shipment
- Condition: New (factory-sealed) and refurbished (tested, warranted) stock available — specify at inquiry
- Documentation: Original YOKOGAWA datasheet, test report, and certificate of conformance available on request
- Counterfeit Prevention: All units verified against YOKOGAWA part number databases; holographic labels and serial traceability confirmed
Procurement Process
- Submit Inquiry: Contact us with your required quantity, condition preference (new/refurbished), and delivery timeline
- Quotation: Receive a formal quotation with unit price, lead time, and shipping options within 24 business hours
- Order Confirmation: Purchase order accepted via email; proforma invoice issued for payment processing
- QC & Dispatch: Unit inspected, photographed, and packed in anti-static ESD packaging with foam protection
- Shipping: DHL / FedEx / sea freight options available; export documentation (commercial invoice, packing list, COO) provided
- After-Sales: 90-day warranty on refurbished units; 12-month warranty on new stock; RMA process available
Technical FAQ
Q: Is the PW302 S4 compatible with CENTUM CS 3000 and CENTUM VP simultaneously?
A: Yes. The PW302 S4 is mechanically and electrically compatible with both CENTUM CS 3000 and CENTUM VP cabinet architectures. Verify your specific FCS model against YOKOGAWA’s compatibility matrix before ordering.
Q: Can I use a single PW302 S4 without redundancy?
A: Yes, single-module operation is fully supported. Redundancy is optional and recommended for SIL-rated or mission-critical loops.
Q: What is the difference between PW302 S4 and PW302 S3?
A: The S4 variant is rated for 220–240V AC input; the S3 variant is rated for 100–120V AC. Ensure your facility’s supply voltage matches before specifying.
Q: Do you provide YOKOGAWA factory repair services?
A: We can facilitate return-to-factory repair coordination for units under YOKOGAWA service contracts. Contact us for details.
Q: What export restrictions apply?
A: YOKOGAWA products may be subject to export control regulations (EAR/ECCN). Buyers are responsible for compliance with applicable import/export laws in their jurisdiction. We provide all necessary export documentation.
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