Product Overview

The Yokogawa PW484-11 serves as the primary high-output power source for the CENTUM VP and CS 3000 Distributed Control System (DCS) architectures. This rack-mountable module converts DC input into a precision-regulated 24V DC supply, delivering up to 240W to power system processors and dense I/O configurations. We supply this unit as 100% Brand New and Original, featuring the Style S1 revision. This model includes enhanced anti-corrosion protection (G3 compliant) to ensure stable logic execution in the most demanding industrial environments.

Part Number Breakdown: PW48x Series

• PW484: 24 V DC Input Power Supply Module.

• Suffix -1: Indicates the high-spec version with ISA Standard G3 conformal coating.

• Suffix 1: Specifies extended temperature range and specialized hardware testing.

• Style S1: Features the latest internal board layout for improved heat dissipation and transient suppression.

Technical Specifications

• Manufacturer: Yokogawa Electric Corporation

• Model Number: PW484-11 (Style S1)

• Input Voltage: 24 V DC (Standard Industrial Range)

• Output Voltage: 24 V DC (Regulated ±1%)

• Output Power: 240 Watts (High Capacity)

• Efficiency: ≥ 85%

• Protection Features: Over-voltage, Over-current, Short-circuit, and Thermal protection

• Cooling Method: Natural Convection (Fanless design)

• Redundancy Support: Yes, supports dual redundant operation with active load sharing

• Operating Temperature: -20 °C to +70 °C (Wide Range Support)

• Weight: 0.8 kg (Net) / 2.0 kg (Shipping)

• Country of Origin: Japan

Engineering Advantages

• ISA G3 Harsh Environment Protection: The PW484-11 comes standard with ISA G3 conformal coating. This chemical barrier shields internal circuitry from corrosive atmospheric agents like Hydrogen Sulfide ($H_2S$) and Sulfur Dioxide ($SO_2$), which typically cause premature failure in standard power cards used in refineries and chemical plants.

• Massive 240W Power Density: This module delivers significantly higher wattage than standard DCS power cards. A single pair of PW484-11 modules provides enough current to energize a fully expanded DCS rack, reducing the number of power modules required and lowering the overall cost of ownership.

• Fanless Maintenance-Free Reliability: Natural convection cooling eliminates mechanical fans—the most common failure point in industrial power systems. This design prevents the intake of conductive dust and metallic shavings, ensuring the module remains maintenance-free throughout its service life.

• Active-Active Redundancy: The PW484-11 supports dual redundant configurations with seamless load sharing. If a primary power source fails, the secondary module instantly assumes the total electrical load without a voltage dip, preventing catastrophic CPU resets or process trips.

• Hot-Swap Maintenance Efficiency: In a redundant setup, technicians can replace a faulty PW484-11 while the system remains live. This "zero-downtime" capability allows for critical hardware updates or repairs without stopping the plant process.

FAQs

• Does the PW484-11 support 110V or 220V AC input?No. The PW484-11 is a 24 V DC Input module. If your rack requires AC power, you must utilize the PW481 (110V AC) or PW482 (220V AC) variants.

• Is the Style S1 backward compatible with S0 installations?Yes. The Style S1 revision maintains full mechanical and electrical compatibility with earlier PW484 versions while offering superior thermal resilience and improved internal component lifespan.

• Why is the G3 coating important for my application?In industries like Pulp & Paper or Petrochemicals, corrosive gases rapidly oxidize copper traces on PCBs. The G3 coating on the PW484-11 prevents this oxidation, ensuring your DCS maintains its safety and control integrity for the full 10-15 year design cycle.

• Why should I only purchase Brand New PW484-11 modules?Power modules utilize high-stress power transistors and electrolytic capacitors. Used or "refurbished" units often have aged components that cannot sustain a full 240W load under high temperatures. A 100% Brand New PW484-11 ensures you receive the maximum MTBF (Mean Time Between Failures) and the full protection of fresh conformal coating.