Product Core Brief

• Model: PW484-50 S1
• Brand: YOKOGAWA
• Series: CENTUM VP Field Control Station Power Supply
• Core Function: 24 V DC input power supply module that provides regulated internal DC power for Yokogawa CENTUM VP Field Control Stations.
• Product Type: FCS Power Supply Module
• Key Specs: 24 V DC input | Standard non-explosion-proof type | Basic configuration | Style S1
• Condition: New Original / New Surplus
• Status: Limited availability; confirm style code, revision, and FCS model before ordering

Key Technical Specifications

• Product type: Yokogawa CENTUM VP Field Control Station power supply module
• Model code:
• Style code: S1
• Input voltage: 24 V DC, based on the PW484 family definition
• Suffix meaning: “-5” = standard type without explosion protection; “0” = basic type without ISA G3 option
• System compatibility: Yokogawa CENTUM VP Field Control Station (FCS)
• Redundancy: Supports dual-redundant power configuration for high-availability FCS nodes
• Diagnostics: Module status indication and fault detection typical of CENTUM VP power supplies
• Typical applications: FCS rack power supply replacement, maintenance spares, system upgrades, and plant shutdown turnarounds
• Handling: ESD-sensitive control system module; verify input voltage, style code, and FCS compatibility before installation

Note: The PW484 family is documented as a 24 V DC input power supply for CENTUM VP FCS. The “-50” suffix indicates the standard non-explosion-proof type with basic configuration, and “S1” is used as a style code on the nameplate. Exact output ratings, mechanical dimensions, and compatible FCS models should be confirmed from the module nameplate or Yokogawa hardware manual.

 

Product Introduction

The PW484-50 S1 is a Yokogawa CENTUM VP Field Control Station power supply module designed for 24 V DC input applications. In CENTUM VP systems, power supply modules provide regulated internal DC power to processors, I/O nodes, and communication components within the FCS rack.

The “-50” suffix indicates the standard type with no explosion protection and basic configuration, meaning it does not carry the ISA G3 conformal coating option. The “S1” marking refers to the module’s style code, which identifies a specific manufacturing revision or configuration variant. This makes the PW484-50 S1 primarily relevant for replacement, maintenance, and spare-parts procurement in existing CENTUM VP installations.

For system integrators and maintenance teams, verifying the style code is important. A PW484-50 with a different style or revision may not be a direct drop-in replacement without confirming compatibility with the existing FCS rack and project configuration.

 

QA & Inspection SOP

Each unit is inspected before release:

1. Nameplate verification: Confirm the model reads PW484-50 and the style code reads S1.
2. Visual inspection: Check the housing, terminals, connectors, and mounting hardware for damage.
3. Terminal check: Inspect DC input terminals and system-side connectors for corrosion, looseness, or burn marks.
4. Insulation check: Verify no visible short circuits between input, output, and ground.
5. Power-on test: Apply rated 24 V DC input and confirm normal output voltage.
6. Status check: Verify module status LEDs or alarm indicators after startup.
7. Redundancy check: If used in a redundant pair, confirm both power supplies match model, style code, and output characteristics.
8. Packaging: Protect terminals and connectors with anti-static packaging.

Full system validation requires installation in a compatible CENTUM VP FCS rack with authorized configuration access.

 

Installation Pitfalls & Guide

❗ Confirm input voltage. PW484 is specified for 24 V DC input. Do not substitute with PW481 (100–120 V AC) or PW482 (220–240 V AC) without verifying voltage and FCS compatibility.

❗ Match the style code. The S1 suffix is a style or revision code. Replacing a PW484-50 S1 with a non-S1 unit may affect compatibility, even if the base model is the same.

❗ Verify FCS compatibility. PW484 modules are designed for CENTUM VP Field Control Stations, not generic 24 V DC supplies or unrelated Yokogawa platforms.

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

❗ Follow plant electrical safety procedures. DC power supply replacement should follow lockout/tagout and site maintenance procedures.

Installation steps:

1. Pre-install: Record the original module model, style code, slot position, and wiring.
2. Isolate power: De-energize the FCS power input according to site safety procedures.
3. Install: Seat the PW484-50 S1 firmly in the correct FCS power slot.
4. Wire: Reconnect DC input and system connectors according to the original wiring.
5. Power-up: Restore DC power and check module status indicators.
6. Verify: Confirm normal FCS operation and absence of power alarms.

Technical FAQ

is S1? It is a Yokogawa CENTUM VP Field Control Station power supply module for 24 V DC input, standard non-explosion-proof type with basic configuration, style code S1.

Which system does it belong to? It belongs to the Yokogawa CENTUM VP FCS power supply family.

Can it replace PW481 or PW482? Not without verification. PW484 is for 24 V DC input, PW481 is for 100–120 V AC, and PW482 is for 220–240 V AC. The FCS model and input voltage must match.

What does the “-50” suffix mean? “-5” = standard type with no explosion protection; “0” = basic type without ISA G3 option.

What should I check before ordering? Confirm the full model code, style code (S1), original FCS model, input voltage, redundancy requirement, and revision. A nameplate photo is the most reliable way to verify compatibility.