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). As a critical infrastructure component within the Field Control Station (FCS), the PW502 (Style S1) provides regulated DC power to control processors, I/O modules, and bus repeaters, ensuring deterministic system performance in mission-critical automation environments.
Designed for maximum uptime, the PW502 (Part Number: PW502) supports dual-redundant configurations. In a duplex setup, two modules operate in parallel to share the load; should one unit detect an internal fault or loss of input voltage, the secondary unit assumes the full load instantaneously without any interruption to the process. This "bumpless" transition 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.
The PW502 (Model: PW502) combines a compact modular footprint with robust electrical protection and high efficiency.
| Feature | Details |
| Manufacturer | Yokogawa Electric Corporation |
| Model Number | PW502 |
| Style Code | Style S1 |
| Series Compatibility | CENTUM VP / CENTUM CS 3000 |
| Product Type | Power Supply Unit for Repeater / FCS |
| Input Voltage | 100–240 V AC (Universal Input, 50/60 Hz) |
| Output Voltage | 24 V DC (Regulated Nominal) |
| Current Capacity | Up to 5 A continuous (load dependent) |
| Redundancy | Supports Dual-Redundant (Primary/Backup) Operation |
| Efficiency | >85% typical |
| Protection | Overvoltage, Overcurrent, Short-circuit, and Thermal |
| Cooling | Natural Convection |
| Operating Temperature | 0°C to +60°C |
| Dimensions | 2.5 cm $\times$ 12.7 cm $\times$ 20.3 cm |
| Net Weight | 0.8 kg (Note: Corrected industrial weight) |
| Country of Origin | Japan |
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