Yokogawa PW401-10

Product Description

Product Parameters

• Brand/Model: Yokogawa PW401-10
• Core Power Parameters
  • Input Voltage: 100-240V AC (50/60Hz) or 110-300V DC (dual redundant input)
  • Output Voltage: 24V DC (regulated), ±0.5V accuracy
  • Output Current: 10A (continuous), 12A (peak for 10s)
  • Efficiency: ≥90% (at full load)
  • Ripple & Noise: ≤50mV p-p (24V output)
• Protection & Safety Parameters
  • Overvoltage Protection: 28V DC (automatic shutdown, self-reset)
  • Overcurrent Protection: 11A (constant current limiting)
  • Surge Protection: Compliant with IEC 61000-4-5 (±2kV surge immunity)
  • Isolation: Input-output isolation (3kV AC), output-output isolation (500V AC)
• Environmental & Physical Parameters
  • Operating Temperature: -10°C ~ +60°C
  • Storage Temperature: -25°C ~ +70°C
  • Vibration Resistance: 5g (10-500Hz, IEC 60068-2-6 standard)
  • Power Consumption: ≤5W (no-load)
  • Protection Grade: IP20 (cabinet installation)
  • Installation Method: DIN 35mm rail mounting or Yokogawa standard rack installation
  • Dimensions: 150mm × 120mm × 100mm

Advantages & Features

1. Dual Redundant Input for Uninterrupted Power: Yokogawa PW401-10 supports dual AC/DC input sources, automatically switching to the backup power supply if the primary source fails. This eliminates single points of failure in the power system, critical for safety-critical applications like emergency shutdown systems.
2. Comprehensive Protection Mechanisms: Equipped with overvoltage, overcurrent, and surge protection, Yokogawa PW401-10 shields connected DCS/SIS components from electrical damage caused by grid instability or equipment faults. The self-reset function reduces manual intervention after minor faults.
3. High Efficiency & Low Heat Dissipation: With ≥90% efficiency at full load, Yokogawa PW401-10 minimizes energy waste and heat generation, reducing the load on cabinet cooling systems and extending the service life of adjacent components.
4. Hot-Swappable & Easy Monitoring: Yokogawa PW401-10 supports hot-swappable replacement, allowing maintenance without shutting down the control system. Built-in LED indicators display input/output status and fault alerts, while communication with the CENTUM VP system enables remote power supply monitoring.

Application Fields & Cases

1. Oil Refinery DCS Power Supply: A major oil refinery deployed Yokogawa PW401-10 modules to power its CENTUM VP DCS controllers and I/O modules in the crude distillation unit. The dual redundant input design ensured continuous power during a grid outage, preventing a costly shutdown of the refinery’s production line.
2. Chemical Plant SIS Power Backup: A petrochemical plant integrated Yokogawa PW401-10 into its ProSafe-RS SIS, providing redundant power to emergency shutdown controllers. During a surge event caused by a nearby transformer failure, the module’s surge protection safeguarded the SIS components, maintaining the system’s ability to trigger critical safety interlocks.
3. Power Plant Boiler Control System: A coal-fired power plant used Yokogawa PW401-10 to supply power to boiler control I/O modules. The module’s high efficiency reduced energy consumption in the control room, while real-time status monitoring via the DCS allowed operators to detect power anomalies before they impacted boiler operation.

Competitor Comparison

Selection Suggestions & Precautions

1. Selection Suggestions: Yokogawa PW401-10 is the optimal choice for Yokogawa CENTUM VP/ProSafe-RS users requiring redundant, high-reliability power supplies for critical control systems. For applications with lower current demands (5A), Yokogawa PW401-05 is recommended. Non-Yokogawa system users may prefer Siemens SITOP PSU8200 for broader compatibility.
2. Precautions:
   • Ensure dual input sources are connected to independent power grids (e.g., main grid + UPS) to maximize redundancy benefits.
   • Install the module in a well-ventilated cabinet to prevent overheating, especially when operating at full load.
   • Verify output voltage accuracy before connecting to sensitive DCS/SIS components to avoid damage from voltage fluctuations.
   • Regularly inspect LED indicators and remote monitoring data to detect early signs of power supply degradation (e.g., reduced efficiency, frequent self-resets).