Yokogawa SPW484 Modules: SPW484-13 Power Supply,

Technical Dossier

Product Details And Specifications

Yokogawa SPW484 Series Technical Notes

The Evolution of SPW484 Architecture

The SPW484 series was introduced as part of Yokogawa's CENTUM CS platform in the mid-1990s, designed to replace earlier discrete power distribution architectures with a modular, hot-swap-capable power supply format. The original CENTUM CS (released 1993) established the backplane bus standard that SPW484 modules are engineered to serve. With the transition to CENTUM VP (2005 onward), Yokogawa maintained backward compatibility for SPW484 modules within existing field control station (FCS) cabinets, allowing brownfield sites to retain existing power infrastructure during partial system upgrades.

Key architectural milestones include: the introduction of redundant power supply configurations (dual SPW484 modules in parallel), integration with the CENTUM VP enhanced diagnostics bus for real-time power status monitoring, and the eventual designation of several SPW484 variants as mature or RFQ availability review products as CENTUM VP R6 and later revisions introduced next-generation power supply designs. Sites running CENTUM CS 1000, CS 3000, and early CENTUM VP installations remain dependent on SPW484 series modules for ongoing maintenance and emergency replacement.

SPW484 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly sourced models within the Yokogawa SPW484 power supply module family, classified by output configuration, redundancy support, and target field control station type.

Power Supply Modules — Standard Output

• SPW484-13: 24VDC regulated output power supply module for CENTUM CS/VP FCS cabinets; single-slot form factor.
• SPW484-11: Primary power supply unit for CENTUM CS 1000/3000 field control stations; non-redundant configuration.
• SPW484-12: Variant with enhanced thermal tolerance for high-ambient-temperature installation environments.
• SPW484-14: Extended output current rating; supports higher I/O density FCS configurations.
• SPW484-21: Redundant-capable power supply; designed for dual-module parallel operation in critical process loops.
• SPW484-22: Redundant power supply with automatic failover; used in SIL-rated safety instrumented system adjacent cabinets.
• SPW484-31: 48VDC output variant for communication bus power distribution within CENTUM VP ESB architecture.
• SPW484-32: Dual-voltage output module supplying both 24VDC and 5VDC rails for mixed-logic I/O backplanes.

Power Supply Modules — Redundancy & Distribution

• SPW484-41: Power distribution module; routes regulated DC from primary SPW484 supply to downstream I/O node buses.
• SPW484-42: Redundant power distribution unit with diode-OR output isolation for N+1 cabinet configurations.
• SPW484-51: Compact power supply for remote I/O node enclosures; reduced form factor vs. standard FCS variants.
• SPW484-52: RIO-rated power supply with surge protection for field-mounted enclosures in outdoor or hazardous area installations.
• SPW484-61: Power supply module with integrated battery backup interface for UPS-linked FCS cabinets.
• SPW484-71: High-efficiency switching power supply; introduced in later CENTUM VP revisions to reduce cabinet thermal load.
• SPW484-81: Replacement module for early CENTUM CS power supply slots; pin-compatible with legacy backplane connectors.
• SPW484-91: Diagnostic-enabled power supply with status output for integration with asset management systems.

Quality Control for the SPW484 Range

SPW484 power supply modules interface directly with CENTUM CS/VP backplane bus connectors and regulate power to safety-critical I/O and controller nodes. DriveKNMS applies a dedicated test protocol for all SPW484 units:

• DC output voltage verification across all rated load conditions (no-load, 50%, 100%, and overload trip).
• Backplane connector pin continuity and insulation resistance testing per IEC 61010 requirements.
• Thermal cycling test to verify capacitor and switching regulator integrity in aged units.
• Redundancy failover simulation for SPW484 dual-module configurations (SPW484-21, -22, -42).
• Functional integration test using CENTUM VP test bench to confirm bus communication and diagnostic register response.
• Visual and X-ray inspection for counterfeit component detection on refurbished units sourced from secondary markets.