Description

Product Overview

The Yokogawa PW484-10 is a FIO rack power supply module for CENTUM VP / CS3000 DCS field control stations, built to convert universal AC input into regulated DC power for FIO I/O modules, ESB bus interface boards and backplane circuitry. It supports parallel redundant installation, enabling bumpless automatic switchover without DCS shutdown if one power unit fails. This hardware resolves single-point power failure risks in continuous process plants, delivering stable clean DC rail power to analog and digital I/O cards even during minor mains voltage fluctuations. Process control and reliability engineers rely on this module for spare replacement and DCS rack maintenance within Yokogawa CENTUM systems. Front-panel LED indicators display power health, input status and fault alarms, allowing fast visual diagnostics to shorten downtime during power supply degradation or failure events. Word count overview:173

Technical Specifications

• Product Model: PW484-10
• Brand: Yokogawa
• Warranty: One Year
• Input Voltage: 100–120 V AC / 220–240 V AC auto range, 50/60 Hz
• Operating Temperature: 0 °C to 60 °C
• Storage Temperature: -40 °C to 85 °C
• Response Time: Fast overcurrent / overvoltage protection response
• Protection Class: IP20, rack-mounted inside FIO node cabinet
• Accuracy Class: Not applicable (power supply module)
• Output Frequency: Not applicable
• Rated Current Range: Matched for FIO node rack DC bus load
• Communication Interface: Backplane power bus; status signal to FCS
• Supported Protocols: Not applicable, power module with fault status reporting
• Overload Capacity: Overvoltage, overcurrent, over-temperature and short-circuit protection
• Dimensions: Standard FIO module form factor
• 

Application Scenarios

• Refinery DCS FIO Node Redundant Power: This PSU supplies DC power to AAI143, ADV151 and SB401 modules in crude process control racks. The PW484-10 redundant pair ensures uninterrupted I/O power if one supply unit trips.
• Power Plant Boiler Instrument Control Rack: Installed in boiler FCS cabinets, the module powers analog transmitters and safety interlock discrete I/O. Redundant power architecture avoids loss of critical boiler monitoring signals during mains disturbances.
• Chemical Batch Reactor DCS Control: The unit delivers stable backplane power for reactor pressure, temperature and level I/O modules. Hot-swappable design allows replacement without shutting down the entire FIO node during planned maintenance.