Product Details

Product Overview

The Yokogawa PW401-S2 (Style S2) serves as the high-integrity power core for the CENTUM CS3000 and CENTUM VP Distributed Control Systems (DCS). It delivers regulated 24VDC power to process controllers, I/O modules, and critical bus interfaces. We supply this module as 100% Brand New and Original, featuring the Style S2 revision which incorporates improved safety circuitry and optimized thermal management. This module ensures stable operation for continuous processes in refineries, chemical plants, and power generation facilities.

Part Number Breakdown: PW401 STYLE S2

• PW401: Base model for CENTUM system power supply.

• STYLE S2: Indicates the second major hardware revision, providing enhanced reliability standards and updated component specifications compared to the original Style S1.

Technical Specifications

Engineering Advantages

• Revision S2 Reliability: The Style S2 revision addresses long-term component wear found in legacy units. It utilizes higher-grade capacitors and improved heat-sink positioning to extend the Mean Time Between Failures (MTBF) in non-climate-controlled environments.

• Seamless Redundancy Integration: Two PW401-S2 modules work in parallel within a CENTUM rack to provide a fault-tolerant power bus. If one module detects an internal failure, the secondary unit assumes the full 102W load instantly, preventing controller reboots and process trips.

• Advanced Fault Isolation: The module features overvoltage and thermal protection that isolates the power unit during electrical surges. This prevents field-side disturbances from damaging the expensive C300 or CS3000 processor cards.

• Rapid Diagnostics: Integrated front-panel LEDs provide instant visual confirmation of input power status and output health. This allows maintenance teams to identify and hot-swap a failing unit before it compromises the redundant pair.

FAQs

Q: Is the PW401-S2 backward compatible with racks using Style S1 modules?

A: Yes. The PW401-S2 maintains physical and electrical compatibility with legacy CENTUM racks. You can utilize Style S2 modules as direct replacements for older S1 units to improve overall system stability.

Q: Does this module support 220VAC input?

A: The standard PW401-S2 optimizes performance for 100-120 VAC input ranges. For 220-240 VAC requirements, please verify the specific suffix on your existing hardware, as Yokogawa offers distinct versions for different regional voltage standards.

Q: How should I handle the grounding for the PW401-S2 during installation?

A: You must seat the module firmly into the CENTUM system rack to engage the grounding bus. Proper frame grounding prevents common-mode noise from affecting sensitive analog I/O signals processed by the DCS.

Are you looking to replace a single unit or do you need a matched redundant pair for a new installation?