Yokogawa PW442-50 STARDOM Series AC Power Supply Module

Product Description

The PW442-50 is a high-integrity power regulation module engineered for legacy Yokogawa control environments, specifically within the STARDOM and associated controller series. This unit functions as the primary energy converter for control nodes, transforming high-voltage AC input into the stabilized DC current required for CPU operation and I/O backplane signaling. Although classified as a discontinued legacy component by the manufacturer, the PW442-50 remains a critical spare part for maintaining existing industrial infrastructures that require 220-240V AC power distribution.

Constructed for high-duty cycles, this power supply utilizes high-grade internal capacitors and magnetic components to ensure long-term stability and ripple-free output. It is designed to fit standard Yokogawa power supply nests, providing a secure electrical and mechanical interface for mission-critical automation hardware.

Detailed Technical Specifications

• Model Number: PW442-50

• Primary Input Voltage: 220 V to 240 V AC (nominal)

• Frequency Range: 50/60 Hz Dual-frequency support

• Current Rating: 0.7 A to 4.0 A (load dependent)

• Output Configuration: Stabilized DC output for controller logic

• Hardware Status: Discontinued / Legacy Support Item

• Physical Weight: 1.00 lbs (approximately 0.45 kg)

• Module Category: Industrial AC/DC Power Supply Unit (PSU)

Legacy Support and Application

The PW442-50-S2 is essential for facilities utilizing older generations of Yokogawa distributed control hardware. It is commonly found in utility monitoring systems, small-to-medium scale process automation, and regional power substations where the original equipment manufacturer (OEM) hardware must be maintained for compliance and continuity.

Engineering FAQ

What is the significance of the S2 suffix in the part number?

The PW442-50-S2 designation typically refers to a specific hardware revision or internal component sourcing standard used during its production cycle. It is vital to match this suffix during replacement to ensure 100% mechanical and electrical compatibility with the existing rack.

How should I handle the replacement of a discontinued PW442-50-S2?

Since this module is no longer in active production, it is recommended to maintain a localized stock of "New Old Stock" or professionally refurbished units. Before installation, the input voltage settings and fuse integrity should be verified against the specific cabinet schematic.