YOKOGAWA PW301 Power Supply Module for Control System Racks

The YOKOGAWA PW301 is a dependable power supply module used to feed stable DC power to Yokogawa control system backplanes. From my experience, it’s chosen as a drop‑in replacement in DCS/PLC cabinets when plants need a quick recovery path with minimal disruption. You might notice that it’s designed for 24/7 industrial duty—solid noise immunity, straightforward status indication, and installation that typically fits neatly into existing Yokogawa system racks.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery time: 1 week for in-stock; no more than one month at the latest
• Payment terms: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Stable DC output to the backplane – Provides regulated power to CPUs and I/O modules for reliable system operation.
• Universal AC input – Typically supports 100–240 VAC, 50/60 Hz, making it suitable for global installations.
• Built-in protection – Overload, over-voltage, and thermal safeguards are commonly included to protect downstream electronics.
• Status indication – Front LEDs (Power/Alarm) help maintenance teams spot issues quickly during rounds.
• Redundancy-ready – On compatible Yokogawa bases, dual supplies can be paired for higher availability.
• Industrial design – Convection-cooled, low ripple/noise output, and robust performance for 24/7 service.

Technical Specifications

Application Fields

The PW301 is typically used in process automation racks where continuous DC power is critical:

• Petrochemical and refining DCS cabinets (controller and I/O bays)
• Power generation and utilities (boiler/BOP control nodes)
• Water and wastewater plants (pump station control panels)
• Pharmaceutical batch skids and OEM machine control panels using Yokogawa racks

A maintenance supervisor told us they swapped a PW301 during a night shift and had a down I/O node back online in under 15 minutes—no rewiring, just slide, seat, and verify the LEDs. That kind of simplicity tends to save a lot of headache during unplanned stops.

Advantages & Value

• Reliability – Stable backplane power reduces nuisance trips and intermittent module faults.
• Compatibility – Designed for Yokogawa control system racks; typically works as a direct replacement without panel changes.
• Reduced downtime – Clear front indicators and easy access help technicians troubleshoot faster.
• Stocking strategy – A single spare can cover multiple cabinets, which in many cases cuts carrying costs.
• Support – We can assist with selection (single vs. redundant) and cabinet power budgeting if needed.

Installation & Maintenance

• Cabinet & mounting – Install in a clean, dry control cabinet with adequate ventilation. Keep a minimum clearance around vents for convection cooling.
• Wiring – Isolate incoming mains, verify correct grounding, and follow torque specs on terminal screws. Use ferrules for stranded conductors.
• Redundancy – For dual supplies, confirm proper load sharing and alarm wiring on the base unit before energizing.
• Environmental – Operate within the specified temperature range; avoid corrosive atmospheres without appropriate cabinet protection.
• Routine maintenance – Quarterly dust removal (dry air), visual check of LEDs and terminals, confirm no discoloration or odor from overheating.
• Spare policy – Keeping one PW301 on the shelf per control room typically covers most emergency scenarios.

Quality & Certifications

• Compliance: CE and RoHS in most cases; UL/CSA recognition may apply depending on configuration and region.
• Manufacturing quality system: ISO 9001 (manufacturer-level quality system)
• Warranty: 365 days from shipment

If you’d like, send the rack/backplane model or a panel photo and I’ll double-check redundancy support and power budgeting for your exact node. That little step usually prevents sizing surprises during shutdowns.