YOKOGAWA PW481-50

Description

Product Description

Product Parameters

Advantages and Features

1. Redundant Power Delivery: YOKOGAWA PW481-50’s dual AC input channels and automatic failover (<5 ms) ensure uninterrupted power to critical DCS/safety systems, eliminating downtime from single-input failures or grid outages.
2. Precision Voltage Regulation: ±1% output voltage accuracy for 24 VDC and 5 VDC outputs prevents voltage fluctuations that could damage sensitive CENTUM VP modules or disrupt process control signals.
3. Comprehensive Protection: Built-in overvoltage, overcurrent, short-circuit, and over-temperature protection safeguards both YOKOGAWA PW481-50 and connected DCS components, reducing the risk of electrical faults in harsh industrial environments.
4. Safety-Critical Compliance: IEC 61508 SIL 2 and ATEX Zone 2 certifications make YOKOGAWA PW481-50 suitable for hazardous process environments (e.g., refineries, chemical plants) where safety is non-negotiable.
5. Seamless Yokogawa Ecosystem Integration: Pre-configured for CENTUM VP and ProSafe-RS systems, the module requires no additional calibration and integrates directly with Yokogawa’s rack architecture, minimizing installation time.
6. Built-In Diagnostics: Real-time monitoring of input voltage, output current, and module temperature provides early warnings of potential failures, enabling proactive maintenance before power disruptions occur.

Application Fields and Cases

Core Application Fields

• Oil & Gas Industry: Refinery CENTUM VP DCS rack power, offshore platform safety system power
• Chemical Industry: Reactor control system power, batch process DCS redundant power supply
• Power Generation Industry: Boiler control unit power, turbine monitoring system redundant power
• Water & Wastewater Industry: Treatment plant SCADA system power, pump station control rack power

Typical Application Case

Competitor Comparison (vs. Emerson DeltaV KJ1501X1-BC2 Power Supply)

Selection Suggestions

1. Ecosystem Compatibility: Prioritize YOKOGAWA PW481-50 for Yokogawa CENTUM VP/ProSafe-RS installations; choose Emerson DeltaV power supplies for Emerson DCS systems.
2. Redundancy Requirements: Select YOKOGAWA PW481-50 for critical process industries (oil & gas, chemicals) requiring <5 ms failover; longer failover times are acceptable for non-critical applications.
3. Hazardous Environment Needs: Use YOKOGAWA PW481-50 for ATEX Zone 2 hazardous areas; non-hazardous environments may use standard redundant power supplies.
4. Load Capacity: Choose YOKOGAWA PW481-50 (20 A 24 VDC output) for large DCS racks with multiple I/O modules; smaller racks may use lower-capacity modules.
5. Spare Parts Planning: Reserve one YOKOGAWA PW481-50 module per 3 redundant power systems to ensure quick replacement in case of failure, especially in remote industrial locations.

Precautions

1. Install YOKOGAWA PW481-50 in a 19-inch rack with adequate ventilation (minimum 10 cm clearance on all sides) to prevent overheating and ensure compliance with ATEX Zone 2 requirements (if applicable).
2. Connect the dual AC inputs to separate power sources (e.g., main grid and UPS) to maximize redundancy and eliminate single points of failure in the power supply chain.
3. Verify load sharing between redundant YOKOGAWA PW481-50 modules after installation to ensure balanced current distribution and prevent overloading of a single module.
4. Use Yokogawa’s diagnostic software to monitor module health (temperature, input/output voltage) and set up alerts for abnormal conditions (e.g., overcurrent, phase loss).
5. Perform firmware updates only via Yokogawa’s official support portal to avoid compatibility issues with CENTUM VP modules; back up configuration data before updating.
6. Store spare modules in a dry, temperature-controlled environment (-20°C ~ 70°C) with anti-static packaging to prevent moisture or electrostatic damage to internal components

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