The Yokogawa PW441-10 is a highly reliable Power Supply Module specifically designed for the CENTUM VP and CENTUM CS 3000 Field Control Stations (FCS). It is the primary energy source for the AFV30 and AFV40 Field Control Units, converting standard AC utility power into the stable DC voltages required by the controller’s internal processors and communication modules.

1. Introduction

The PW441-10 is a “system-side” power supply. In a typical Yokogawa DCS setup, these modules are installed in pairs to provide redundant power. If one module fails or its power source is interrupted, the other module takes over the full load instantly without causing a system reset. The “-10” suffix denotes the standard style code for the 100-120V AC input version.

2. Technical Parameter Table

3. Product Advantages and Features

Built-in Redundancy Management: Seamlessly integrates with a second PW441 to ensure 24/7 uptime for critical controllers.

AC Fail Detection: Includes a sophisticated detection circuit that notifies the CPU of an impending power loss, allowing the system to execute “Power Fail” processing to protect memory.

Hot-Swappable: A faulty power module can be replaced while the controller is running, provided the redundant partner is healthy.

G3 Conformal Coating: Standard protection against harsh industrial atmospheres containing corrosive gases like $H_2S$ and $SO_2$.

Robust Thermal Design: Specifically engineered to dissipate heat effectively within the compact confines of an FCS cabinet.

4. Application Cases

Continuous Process Industries: Used in oil refineries and chemical plants where a power failure could lead to dangerous pressure buildups or massive production losses.

Safety Instrumented Systems (SIS): Providing the stable power base for logic solvers in emergency shutdown scenarios.

Power Plant Control: Managing the critical control loops for turbines and boilers where electrical stability is paramount.

Remote Instrumentation Sheds: Operating in unmanned stations where high-reliability hardware is required due to infrequent maintenance access.

5. Related Models & Same Series

The PW44x series is categorized based on the input voltage requirements of the plant.

Other Models in the Same Series

PW442-10: The 220-240 V AC version of the power supply (used in European and Asian markets).

PW444-10: The 24 V DC input version, often used in sites powered by battery banks or solar arrays.

PW481 / PW482: Power supply modules for different node types or specific legacy backplanes.

Related System Components

AFV30D / AFV40D: The Field Control Units that house the PW441 modules.

VI451: The Vnet/IP communication module that receives its power from the PW441.

PW441-S1: A special style code version for specific environmental or regional certifications.