Product Overview

The Yokogawa PW441-11 is a high-reliability power supply module designed for the CENTUM VP Distributed Control System (DCS). This module serves as the primary energy source for Field Control Units (FCU), converting standard AC utility power into the regulated DC voltages required by the internal processor and I/O modules. Engineered for the rigors of 24/7 industrial operations, the PW441-11 ensures that sensitive control logic remains isolated from the electrical noise, voltage spikes, and frequency fluctuations commonly found on industrial power grids.

By implementing advanced regulation circuitry, the PW441-11 provides a stable power backbone for mission-critical automation. It is typically deployed in redundant pairs within a rack-mount chassis to facilitate a high-availability architecture, ensuring that the control system remains fully operational even if one power source or module fails.

Technical Specifications

• Manufacturer: Yokogawa

• Model Number: PW441-11

• Module Type: Power Supply Module

• Input Voltage: 100 V to 120 V AC (85 V to 132 V AC range)

• Input Frequency: 50/60 Hz (47 Hz to 63 Hz range)

• Output Power: Regulated DC supply for system internal logic

• Efficiency: High-conversion efficiency with integrated heat dissipation

• Isolation: Galvanic isolation between primary AC input and secondary DC output

• Mounting: Rack-mount / Slot-in for Field Control Units (AFV30, AFV40)

• Dimensions: 48.2 mm x 146 mm x 130 mm

• Weight: 0.6 kg

• Origin: Japan

Key Technical Characteristics

• Advanced Noise Filtering: Features integrated high-frequency noise suppression to prevent electromagnetic interference (EMI) from affecting the accuracy of analog signal processing and digital logic.

• Redundant Operation Support: Designed for bumpless load-sharing. When two PW441-11 modules are used in a duplexed configuration, they provide automatic failover protection to maintain 100% system uptime.

• Comprehensive Circuit Protection: Built-in safeguards protect against overvoltage, undervoltage, and short-circuit conditions, preventing damage to the expensive processor and I/O modules downstream.

• Voltage Stability: Maintains a consistent output despite significant fluctuations in input mains (supporting a wide tolerance range), reducing the need for external line conditioners.

• Diagnostic Monitoring: Features front-panel status indicators (LEDs) for instant verification of power health, making troubleshooting straightforward for maintenance personnel.

• Standardized Integration: Natively compatible with Yokogawa’s FIO-based Field Control Units, allowing for tool-free installation and seamless fitment into standard 19-inch industrial racks.