Product Overview

The Yokogawa PW301-S3 serves as a high-output power backbone for CENTUM VP Distributed Control Systems (DCS) and ProSafe-RS Safety Instrumented Systems (SIS). This module converts universal AC mains into a precision-regulated 24V DC rail, providing the 288W capacity required for mission-critical CPUs and high-density I/O clusters. We supply this unit as 100% Brand New and Original, ensuring your facility utilizes the latest Style S3 engineering revisions for maximum electrical stability and fault tolerance.

Part Number Breakdown: PW301 Series

• PW301: Base Model: High-Capacity Industrial Power Supply Module.

• S3: Style 3 Revision: Features upgraded fan-assisted cooling and enhanced transient protection circuits for superior longevity over S1/S2 versions.

Technical Specifications

Engineering Advantages

• High-Current 12A Output: The PW301-S3 delivers a powerful 12 Amp continuous current, making it the ideal choice for powering multi-rack DCS nodes and power-hungry communication modules. This high wattage eliminates the need for multiple smaller power supplies, simplifying cabinet wiring.

• Active Redundancy for SIS Applications: Designed for fault-tolerant architectures, this module supports 1:1 redundancy. In critical ProSafe-RS safety loops, the PW301-S3 ensures that a single power source failure never results in a safety trip or process shutdown.

• Superior Thermal Management: Unlike fanless modules, the PW301-S3 utilizes fan-assisted cooling. This active airflow allows the module to maintain a high 288W output even in ambient temperatures up to +60 °C, preventing the thermal throttling often seen in passive units within crowded control panels.

• Grid-Independent Stability: The advanced internal regulation circuitry maintains a strict 24V DC output despite wide fluctuations in input voltage (100–240V AC). This protects sensitive logic processors from brownouts, surges, and electrical noise typical of heavy industrial grids.

• Fail-Safe Circuitry: Integrated over-voltage and over-current protection mechanisms safeguard your multi-million dollar CPU and I/O hardware. In the event of a field-side short circuit, the module isolates the fault to prevent damage to the backplane.

FAQs

• Can the PW301-S3 be used in place of an older PW301 Style S1?

  Yes. The Style S3 revision maintains full mechanical and electrical backward compatibility with previous PW301 versions. It offers improved efficiency and better thermal performance, making it a superior replacement for maintenance and upgrades.

• How does the redundancy failover function?

  When installed in a redundant pair, the modules share the load. If one unit fails, the internal diode-ORing circuitry allows the healthy module to assume the full 12A load instantaneously without a voltage dip, keeping the DCS or SIS fully operational.

• What are the specific mounting requirements?

  The PW301-S3 supports both rack and DIN rail mounting. Because this module uses fan-assisted cooling, you must ensure that the intake and exhaust vents remain unobstructed by cables or adjacent modules to prevent heat buildup.

• Why is "Brand New" condition mandatory for this specific module?

  The PW301-S3 is often deployed in Safety Instrumented Systems (SIS). Used or "refurbished" modules may have internal fans near the end of their bearing life or capacitors with reduced ripple-filtering capability. A 100% Brand New unit ensures the hardware meets its certified reliability metrics for critical safety functions.