Product Core Brief

• Model: PW301
• Brand: YOKOGAWA
• Series: CENTUM VP / ProSafe-RS System Power Supply
• Core Function: System power supply module providing regulated DC power for Yokogawa control stations and safety control stations.
• Product Type: Power Supply Module
• Key Specs: 24 V DC output | Redundant power support | DIN-rail / rack mount | Fault alarm output
• Condition: New Original / New Surplus
• Status: Limited availability; confirm revision and system platform before ordering

Key Technical Specifications

• Product type: Yokogawa system power supply module
• Model code: PW301 (suffix such as S4 indicates revision/configuration)
• System compatibility: Yokogawa CENTUM VP Field Control Station (FCS) and ProSafe-RS Safety Control Station (SCS)
• Output: 24 V DC system power (typical for Yokogawa FCS/SCS racks)
• Input: AC or DC system input depending on revision and installation; confirm from nameplate
• Redundancy: Supports dual-redundant power configuration for high-availability control stations
• Diagnostics: Built-in status indication and fault alarm output for power failure or abnormal conditions
• Mounting: DIN-rail or control station rack mount, depending on application
• Handling: ESD-sensitive power module; verify revision, input rating, and slot compatibility before installation

Note: Public listings describe the PW301 as a Yokogawa power supply module used in CENTUM VP and ProSafe-RS systems, with some variants listed as DIN-rail 24 V DC supplies. Exact input voltage range, output current, dimensions, and revision should be confirmed from the module nameplate or official Yokogawa hardware manual.

 

Product Introduction

The PW301 is a Yokogawa power supply module used to provide regulated DC power for control system hardware. It is commonly associated with CENTUM VP Field Control Stations and ProSafe-RS Safety Control Stations, where stable and redundant power is critical for continuous process control and safety system operation.

In CENTUM VP and ProSafe-RS architectures, power supply modules are not generic replacements. They must match the controller family, rack type, revision, and redundancy configuration. The PW301 is therefore primarily relevant for maintenance, replacement, and spare-parts procurement in existing Yokogawa DCS and SIS installations.

For system integrators and maintenance teams, verifying the exact revision and installation context is important before procurement. A PW301 used in a CENTUM VP FCS node may have different mechanical or electrical requirements than one used in a ProSafe-RS SCS node.

 

QA & Inspection SOP

Each unit is inspected before release:

1. Nameplate verification: Confirm the model reads PW301 and record any suffix such as S4, revision, and serial number.
2. Visual inspection: Check the housing, terminals, connectors, and mounting clips for damage or corrosion.
3. Terminal check: Inspect input/output terminals for loose contacts, oxidation, or burned marks.
4. Insulation check: Verify no visible short circuits between input, output, and ground terminals.
5. Power-on test: Apply rated input power and confirm normal output voltage.
6. Alarm output check: Verify fault/alarm relay or status indication if accessible.
7. Redundancy check: If used in a redundant pair, confirm both units match revision and output characteristics.
8. Packaging: Protect terminals and connectors with anti-static packaging.

Full system validation requires installation in a compatible CENTUM VP or ProSafe-RS rack with authorized configuration access.

Installation Pitfalls & Guide

❗ Confirm the system platform. The PW301 may be used in CENTUM VP FCS or ProSafe-RS SCS applications. Do not assume cross-compatibility without checking the rack type and hardware manual.

❗ Match the revision code. Suffixes such as S4 may indicate different revisions or configurations. Replacing with a mismatched revision can affect mounting, wiring, or diagnostics.

❗ Verify input voltage. Some listings describe 100–240 V AC input versions, but the exact input rating must be confirmed from the nameplate before energizing.

❗ Check redundancy configuration. If the original power supply was installed as a redundant pair, both units should match in revision and output specification.

❗ Do not substitute with generic 24 V supplies. System power modules are integrated with rack bus, diagnostics, and protection circuits. Generic replacements may not provide proper fault detection or system compatibility.

Installation steps:

1. Pre-install: Record the original module model, revision, slot position, and wiring configuration.
2. Isolate power: Follow site electrical safety procedures before removing or replacing power modules.
3. Install: Seat the PW301 firmly in the correct rack or DIN-rail position.
4. Wire: Reconnect input power and output terminals according to the original wiring.
5. Power-up: Restore power and check output voltage and status indicators.
6. Verify: Confirm normal controller or safety station operation and absence of power alarms.

 

Technical FAQ

What is PW301?
PW301 is a Yokogawa power supply module used to provide system DC power for control and safety stations.

Which systems use PW301?
It is commonly used in Yokogawa CENTUM VP and ProSafe-RS systems, particularly in FCS and SCS racks.

Is PW301 a DIN-rail or rack module?
Both descriptions exist in public listings. The exact mounting type depends on the application and revision, so confirm from the nameplate and hardware manual.

Can I replace it with any 24 V power supply?
No. System power modules must match the controller family, rack interface, revision, and redundancy design. Using a generic power supply may cause compatibility or safety issues.

What should I check before ordering?
Confirm the full model code, revision, input voltage, output rating, mounting type, original system platform, and rack position. A nameplate photo is the most reliable way to verify compatibility.