Product Overview

The PW502 (Model: PW502) is a high-availability power supply module specifically engineered for Yokogawa’s CENTUM VP and CENTUM CS 3000 Distributed Control Systems (DCS). Operating as a critical infrastructure component within the Field Control Station (FCS) and bus repeater assemblies, the PW502 (Style S1) provides highly regulated DC power to control processors, I/O modules, and internal communication circuitry, ensuring deterministic system performance in mission-critical automation environments.

To guarantee maximum plant uptime, the PW502 (Part Number: PW502) supports dual-redundant configurations. In a duplex setup, two modules operate in parallel to share the system load. Should one unit detect an internal hardware fault or a loss of input voltage, the secondary unit assumes the full load instantaneously with a "bumpless" transition. This fault-tolerant architecture is vital for industries such as oil refining, chemical processing, and power generation, where even a momentary power dip can lead to costly system trips or unsafe conditions.

Detailed Technical Specifications

The PW502 (Style S1) combines a compact modular footprint with robust electrical protection and high conversion efficiency.

• Manufacturer: Yokogawa Electric Corporation (Japan)

• Model Number: PW502

• Hardware Revision: Style S1

• DCS Series Compatibility: CENTUM VP, CENTUM CS 3000

• Product Type: System Power Supply Unit (PSU)

• Input Voltage: 100–240 V AC (Universal wide-range input)

• Input Frequency: 50/60 Hz (± 3 Hz)

• Output Voltage: 24 V DC (Regulated nominal bus voltage)

• Output Current Capacity: Up to 5.0 A continuous

• Redundancy Support: 1:1 Dual-redundant (Primary/Secondary) operation

• Conversion Efficiency: Typically >85% at full rated load

• Integrated Protection: Overvoltage, Overcurrent, Short-circuit, and Thermal Shutdown

• Cooling Method: Natural Convection (No moving fans for increased MTBF)

• Operational Temperature: 0°C to +60°C

• Storage Temperature: -20°C to +85°C

• Dimensions (W x H x D): 2.5 cm x 12.7 cm x 20.3 cm

• Net Weight: 0.8 kg (1.76 lbs)