Product Overview

The Yokogawa PW402-S2 functions as a high-performance power conversion module for the CENTUM CS3000 and CENTUM VP Distributed Control System (DCS) platforms. This Style S2 revision delivers a regulated 24 VDC output (supporting up to 102W total power) to energize controllers, I/O modules, and fieldbus communication interfaces. We offer this unit as 100% Brand New and Original in Factory Packing, providing the updated safety and reliability standards inherent to the S2 revision for critical oil & gas, chemical, and power generation assets.

Part Number Breakdown: PW402-S2

• PW402: Base model identifier for the CENTUM series power supply module.

• Style S2: Designates the second-generation hardware revision, which features optimized internal circuitry and enhanced thermal dissipation characteristics compared to legacy Style S1 units.

Technical Specifications

Engineering Advantages

• Revision S2 Hardware Optimization: The Style S2 revision eliminates common failure points found in older power modules. It utilizes high-grade industrial capacitors and an updated PCB layout to ensure stable 24VDC delivery even during high-frequency switching or fluctuating AC input conditions.

• Fault-Tolerant Redundancy: Two PW402-S2 modules integrate seamlessly into a single system rack to facilitate N+1 redundancy. If the primary module fails, the redundant partner assumes the full electrical load instantly, preventing controller reboots and maintaining continuous process control.

• Active Status Monitoring: Front-panel diagnostic LEDs provide real-time visual feedback on module health. The unit communicates internal fault states—such as overvoltage or thermal thresholds—directly to the DCS software, enabling predictive maintenance before a secondary failure occurs.

• Hot-Swappable Maintenance: The module architecture allows for live replacement. Maintenance teams extract and replace faulty units without interrupting the power bus or shutting down the plant, significantly reducing Mean Time to Repair (MTTR).

FAQs

Q: Does the PW402-S2 replace the older PW402 Style S1?

A: Yes. The Style S2 is a direct, backward-compatible replacement for Style S1 modules. It offers superior thermal management and meets more stringent modern safety certifications while fitting the same rack footprint.

Q: What happens if the input voltage spikes beyond the rated range?

A: The PW402-S2 incorporates robust overvoltage and surge protection. It clamps excessive voltage to protect downstream controllers and, in extreme cases, triggers a safe thermal shutdown to prevent damage to the DCS backplane.

Q: Can I mix a PW402-S2 with an older revision in a redundant setup?

A: While Style S2 modules can operate alongside older revisions, Yokogawa recommends using matched S2 pairs for redundant configurations to ensure perfectly balanced load-sharing and identical diagnostic response times.