Yokogawa PW302 S4 Power Supply Module

Description

The Yokogawa PW302-S4 is an Input Power Supply Module designed for use in Yokogawa’s legacy and transition-phase Distributed Control Systems (DCS), specifically the CENTUM CS and CENTUM CS 3000 series. It is typically installed in RIO (Remote I/O) nodes or local bus nodes to provide stabilized DC power to the nested I/O modules and communication interfaces. 

Specifications

• Model Number: PW302-S4
• Input Voltage: 100 to 120 VAC nominal.
• Frequency: 50/60 Hz.
• Application: Powering Remote I/O (RIO) units and node units.
• Compatibility: Used in AFV, ANB, and ANT series racks (depending on baseplate version).
• Output: Regulated internal system voltages (+5V, +24V typical for backplane).
• Mounting: Dedicated power supply slots (usually the leftmost slots in a rack).
• Shipping Weight: Approximately 2.0 kg.

Features

• Dual Redundancy: Designed to be installed in pairs. In a redundant setup, the two PW302 modules share the current load. If one fails, the other instantly assumes the full load without any disruption to the process control logic.
• Self-Diagnostics: The module monitors its own internal health and output stability. Any deviation from standard parameters triggers a status signal to the system processor, resulting in a DCS console alarm.
• Electrical Isolation: Provides high-grade galvanic isolation between the plant's AC mains and the sensitive digital electronics of the DCS, protecting against surges and noise.
• Robust Thermal Design: Engineered for continuous operation in industrial control rooms, with internal heat dissipation optimized for high-density rack configurations.
• Status Monitoring: Equipped with LED indicators on the front panel (POWER/FAULT) for immediate visual verification of power status by maintenance personnel.