Yokogawa PW502 S1 Power Supply Unit | 5V DC Industrial PSU

Yokogawa PW502 S1 Power Supply Unit - Reliable 5V DC Output for Industrial Control Systems

The Yokogawa PW502 S1 Power Supply Unit is engineered to deliver stable, regulated 5V DC power for demanding industrial automation environments. Designed specifically for Yokogawa CENTUM DCS systems and compatible control platforms, this compact PSU ensures uninterrupted operation of critical field control units, I/O modules, and communication interfaces.

Technical Specifications

• Model: PW502 S1
• Output Voltage: 5V DC ±3%
• Output Current: 10A maximum
• Input Voltage Range: 100-240V AC, 50/60Hz (universal input)
• Power Capacity: 50W continuous
• Mounting: DIN rail (35mm standard)
• Operating Temperature: -10°C to +55°C
• Protection: Overvoltage, overcurrent, short-circuit protection
• Efficiency: >85% at full load
• Dimensions: 120mm × 90mm × 65mm
• Weight: 0.98 kg
• Certifications: CE, UL, cUL

Key Features & Benefits

Universal Input Compatibility: Accepts 100-240V AC input, making it suitable for global deployment without voltage conversion requirements.

High Reliability Design: Built with industrial-grade components and comprehensive protection circuits to ensure continuous operation in harsh environments including temperature extremes, electrical noise, and voltage fluctuations.

Compact DIN Rail Form Factor: Space-efficient design allows easy integration into control cabinets alongside other automation components, reducing installation footprint.

Low Ripple & Noise: Advanced filtering circuitry maintains clean DC output with minimal ripple, protecting sensitive electronic components from power-related failures.

Application Scenarios

CENTUM DCS Power Distribution: Primary power source for Yokogawa CENTUM VP/CS 3000 field control units, processor modules (CP series), and I/O subsystems requiring stable 5V logic power.

Process Control Retrofits: Ideal replacement PSU for aging power supplies in existing installations, offering improved efficiency and extended MTBF compared to legacy units.

Distributed I/O Systems: Powers remote I/O racks, communication modules, and field devices in distributed control architectures across oil & gas, chemical processing, and power generation facilities.

Safety Instrumented Systems: Provides reliable power for safety-critical applications when paired with redundant configurations, supporting SIL-rated system requirements.

Integration & Compatibility

The PW502 S1 integrates seamlessly with Yokogawa's CENTUM family of control systems, including field control nodes (FCN), autonomous field controllers (AFC), and legacy CENTUM CS platforms. It supplies power to processor modules such as CP451, CP461, CP471 series, as well as analog/digital I/O cards, communication interfaces, and ESB bus components.

For redundant power configurations, pair with a second PW502 unit using diode-OR modules to achieve N+1 reliability. The unit's LED status indicators provide at-a-glance diagnostics for output voltage and fault conditions.

Installation & Maintenance

Installation requires standard DIN rail mounting with screw terminals for AC input and DC output connections. Ensure adequate ventilation clearance (minimum 50mm on sides) for convection cooling. No forced air cooling required under normal operating conditions.

Routine maintenance involves periodic inspection of terminal connections and visual verification of LED status. The unit features a maintenance-free design with no user-serviceable components, reducing lifecycle costs.

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