Product Core Brief

• Model: PW481-50
• Brand: YOKOGAWA
• Series: CENTUM VP Field Control Station Power Supply
• Core Function: 100–120 V AC 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: 100–120 V AC input | Standard type, non-explosion-proof | Wide temperature range -20°C to 70°C | Redundant power support
• Condition: New Original / New Surplus
• Status: Limited availability; confirm revision and FCS model before ordering

Key Technical Specifications

• Product type: Yokogawa CENTUM VP Field Control Station power supply module
• Model code:
• Input voltage: 100–120 V AC
• Suffix meaning: “-5” = standard type with no explosion protection; “0” = basic type without ISA G3 option
• Temperature range: -20°C to 70°C operating temperature option
• System compatibility: Yokogawa CENTUM VP Field Control Station (FCS)
• Redundancy: Supports 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, revision, and FCS compatibility before installation

Note: The PW481 family is documented as a 100–120 V AC input power supply for CENTUM VP FCS. The “-50” suffix indicates the standard non-explosion-proof type with basic configuration. Exact output ratings, mechanical dimensions, and compatible FCS models should be confirmed from the module nameplate or Yokogawa hardware manual.

 

Product Introduction

The PW481-50 is a Yokogawa CENTUM VP Field Control Station power supply module designed for 100–120 V AC 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 (without ISA G3 conformal coating). This module also carries the wide temperature range option (-20°C to 70°C), making it suitable for environments with broader ambient temperature variations.

For maintenance and procurement teams, the PW481-50 is primarily used as a direct replacement or spare part for existing CENTUM VP installations. Because CENTUM VP power supplies must match the FCS model, input voltage, and redundancy configuration, verifying the original nameplate is essential before ordering.

QA & Inspection SOP

Each unit is inspected before release:

1. Nameplate verification: Confirm the model reads PW481-50 and record revision and serial information.
2. Visual inspection: Check the housing, terminals, connectors, and mounting hardware for damage.
3. Terminal check: Inspect AC 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 100–120 V AC 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 revision 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. PW481 is specified for 100–120 V AC input. Do not substitute with PW482 (220–240 V AC) or PW484 (24 V DC) without verifying voltage and FCS compatibility.

❗ Match the suffix code. PW481-50 is the standard non-explosion-proof type with basic configuration. Replacing it with PW481-51 or PW481-E0 may change environmental protection or configuration compatibility.

❗ Verify FCS compatibility. PW481 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, revision, and output specification.

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

Installation steps:

1. Pre-install: Record the original module model, suffix, revision, slot position, and wiring.
2. Isolate power: De-energize the FCS power input according to site safety procedures.
3. Install: Seat the PW481-50 firmly in the correct FCS power slot.
4. Wire: Reconnect AC input and system connectors according to the original wiring.
5. Power-up: Restore AC power and check module status indicators.
6. Verify: Confirm normal FCS operation and absence of power alarms.

Technical FAQ

is ? It is a Yokogawa CENTUM VP Field Control Station power supply module for 100–120 V AC input, standard non-explosion-proof type with basic configuration.

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

Can it replace PW482 or PW484? Not without verification. PW481 is for 100–120 V AC, PW482 is for 220–240 V AC, and PW484 is for 24 V DC input. 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, original FCS model, input voltage, redundancy requirement, and revision. A nameplate photo is the most reliable way to verify compatibility.