YOKOGAWA PW401-S2

Description

1. Product Overview

2. Product Parameters

2.1 Core Power Specifications

• Input Voltage: 85-264V AC (50/60Hz, universal input) or 120-370V DC (dual input capability)
• Output Voltage: 24V DC (adjustable ±1%), single output channel
• Output Current: 5A (continuous), 7.5A (peak for 10s)
• Efficiency: ≥90% (at full load), reducing energy waste and heat generation
• Ripple & Noise: ≤30mV p-p (24V output), ensuring clean power for sensitive DCS/SIS components

2.2 Electrical & Protection Features

• Protection Mechanisms: Overvoltage protection (27.6V DC max), overcurrent protection (6A min), overheating protection (105°C shutdown), short-circuit protection (auto-recovery)
• Isolation Rating: 3000V AC input-to-output, 500V AC output-to-ground
• Power Factor Correction (PFC): Passive PFC (≥0.85 at full load), compliant with EN61000-3-2 Class A
• Diagnostic Signals: DC OK relay output (contacts for power status monitoring), LED indicators (power ON, fault)

2.3 Environmental & Mechanical Parameters

• Operating Temperature: -10°C to +60°C (derating 2.5% per °C above 50°C)
• Storage Temperature: -25°C to +70°C
• Relative Humidity: 5% to 95% (non-condensing), IP20 protection
• Vibration Resistance: 5-2000Hz, 1g (IEC 60068-2-6, X/Y/Z axes)
• Shock Resistance: 15g (11ms half-sine wave, IEC 60068-2-27)
• Mounting: DIN rail-mounted (35mm standard) or panel-mounted, compact design (120mm × 100mm × 70mm)

2.4 Certifications & Compatibility

• Safety Certifications: UL/cUL 61010-1, CE, ATEX Zone 2 (Ex nA IIC T4)
• Industry Certifications: RoHS, REACH, IEC 61010-1
• Compatibility: YOKOGAWA CENTUM VP I/O modules (AAI141, ADV141), ProSafe-RS basic modules, YOKOGAWA remote I/O racks
• MTBF: ≥400,000 hours (per Telcordia SR-332 standards)

3. Advantages & Features

1. Dual Input Flexibility: YOKOGAWA PW401-S2 supports both AC (85-264V) and DC (120-370V) input, making it suitable for applications with unstable power grids or backup DC systems—critical for remote oil & gas sites and emergency power setups.
2. Compact & Space-Saving: With a DIN rail/panel-mountable design and small footprint, YOKOGAWA PW401-S2 fits into tight control cabinets and skid-mounted systems, eliminating the need for large power enclosures and reducing installation costs.
3. Reliable Protection: Comprehensive OVP, OCP, overheating, and short-circuit protection safeguards connected DCS/SIS components from power anomalies, while auto-recovery after short-circuit faults minimizes manual intervention.
4. Easy Monitoring & Maintenance: The DC OK relay output and LED indicators provide real-time power status feedback, allowing integration with plant monitoring systems. YOKOGAWA PW401-S2’s plug-and-play design enables quick replacement without specialized tools.
5. Global Compatibility: The universal AC input (85-264V) ensures YOKOGAWA PW401-S2 works with power grids worldwide, from 110V AC (North America) to 220V AC (Europe/Asia), simplifying international project deployments.

4. Application Fields & Cases

4.1 Application Fields

• Oil & Gas: Remote wellhead monitoring systems, offshore platform distributed I/O racks, pipeline SCADA power supplies
• Petrochemical: Skid-mounted process units, modular reactor control systems, small-scale refinery auxiliary controls
• Power Generation: Turbine auxiliary system controls, transformer monitoring units, renewable energy inverter controls
• Water & Wastewater: Pump station control systems, water quality analysis equipment, sewage treatment plant distributed I/O

4.2 Typical Cases

1. Offshore Wellhead Monitoring: A Norwegian offshore oil company deployed YOKOGAWA PW401-S2 to power remote wellhead pressure/temperature sensors and CENTUM VP I/O modules. The module’s dual AC/DC input capability ensured uninterrupted power during grid outages (switching to backup DC), while its compact design fit into the limited space of wellhead control enclosures.
2. Modular Chemical Skid: A German chemical manufacturer integrated YOKOGAWA PW401-S2 into skid-mounted reactor systems to supply power to ProSafe-RS safety modules. The module’s 90% efficiency reduced heat generation in the sealed skid cabinet, and overheating protection prevented shutdowns during high-temperature operation.
3. Water Treatment Plant: A U.S. municipal water treatment facility used YOKOGAWA PW401-S2 to power distributed I/O racks monitoring filter systems and chemical dosing pumps. The universal AC input simplified installation across multiple plant locations with varying power grid voltages, and the DC OK relay output enabled remote monitoring of power status via the plant’s SCADA system.

5. Competitive Comparison

6. Selection Suggestions & Precautions

6.1 Selection Suggestions

1. Space & Input Needs: Choose YOKOGAWA PW401-S2 for compact enclosures or applications requiring dual AC/DC input (e.g., remote oil & gas sites); select larger power supplies for high-current (≥10A) DCS/SIS racks.
2. Hazardous Area Requirements: Opt for YOKOGAWA PW401-S2 for ATEX Zone 2 hazardous locations (e.g., petrochemical skids); non-certified supplies are suitable for safe-area installations.
3. Monitoring Needs: Select YOKOGAWA PW401-S2 if remote power status monitoring (DC OK relay) is required; basic supplies may lack this feature.

6.2 Precautions

1. Installation Guidelines:
   • Mount YOKOGAWA PW401-S2 on a 35mm DIN rail or panel with minimum 5cm clearance for ventilation; avoid direct sunlight or heat sources.
   • Wire input power with appropriate fusing (10A for AC input) and use shielded cables for output connections to reduce noise.
2. Configuration Notes:
   • Adjust output voltage (24V ±1%) using the built-in potentiometer before connecting to DCS/SIS components to match load requirements.
   • Connect the DC OK relay output to the plant’s monitoring system for real-time power fault alerts.
3. Troubleshooting:
   • For no output: Check input power, fuse status, and overheating (module will auto-recover once cooled); verify short-circuit conditions in the load.
   • For unstable output: Inspect input voltage fluctuations (use a stabilizer if needed) and loose output connections.
4. Maintenance:
   • Inspect input/output terminals for corrosion annually and tighten loose connections.
   • Replace the module if efficiency drops below 85% (indicates component degradation) or if protection mechanisms trigger frequently.
   • Stock spare YOKOGAWA PW401-S2 modules for critical remote applications to minimize downtime.

IC693CPU366 GE PLC
IC693CPU367 GE PLC
IC694MDL645 GE PLC
IC694MDL646 PLC
GE IC693CPU370 PLC
IC694MDL648 GE
IC694MDL654 DCS GE
IC694MDL655 GE PLC
IC694MDL658 PLC GE