Overview
Manuals
Typical Industry Use Cases
Working Principle
Features:
- Accepts nominal 24V DC with a ±10% tolerance (21.6V to 26.4V DC) to handle line fluctuations
- Supports hot-standby configuration to guarantee automatic, bumpless power switchover and continuous operation
- Converts primary input into stable internal 5.1V DC and 24V DC rails for rack cards
The primary function of the Yokogawa PW404 S1 is to provide an extremely stable and clean DC power supply for the core components of a DCS system. As a power module specifically designed for critical control bus devices such as field control units (FCUs), FIO node units, and fiber optic ESB bus repeaters, it is specifically responsible for receiving the 24VDC power commonly found in industrial environments and converting it into a high-precision internal operating voltage to directly power the processor, I/O modules, and various communication interfaces.
Furthermore, this module boasts excellent resistance to environmental fluctuations and high availability protection. It allows input voltage fluctuations within a wide range of ±10%, perfectly resisting interference from power grid drops or harsh industrial electromagnetic environments, ensuring continuous power supply to core equipment on the production line. To meet the high standards required for uninterrupted production, the PW404 S1 natively supports dual redundancy configurations. With hot-swappable technology, it allows for online replacement of individual modules without affecting the production process, thereby minimizing the risk of system downtime due to power outages.
The PW404 S1 YOKOGAWA Power Supply Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
YOKOGAWA PW404 S1 Power supply module INFO(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The Yokogawa PW404 S1 power supply module is used in high-availability DCS networks across these sectors:
- Oil & Gas / Refining: Upstream platforms, pipelines, and downstream refineries.
- Chemical & Petrochemical: Continuous production plants and reactor control stations.
- Power Generation: Boiler controls, turbine protection, and plant automation.
- Metallurgy & Heavy Industry: Blast furnaces and rolling mill control cabinets.
The Yokogawa PW404 S1 filters a nominal 24V DC input and uses high-frequency DC-DC switching technology to regulate it into stable 5.1V DC and 24V DC rails for rack cards. Internal auctioneering diodes allow parallel hot-standby redundancy for instantaneous, bumpless load-transfer during a failure, while an integrated S9504VK fuse provides immediate overcurrent protection.
