PW401 YOKOGAWA

PW401 Yokogawa Input module

Brand：Yokogawa Model number：PW401

Country of origin: Japan Product weight：0.55kg

HS code：8538900000

Product Details：

Product Dimensions：

The PW401 power supply module is engineered for high-availability process control environments. It mounts directly into the dedicated power supply slots of Yokogawa CENTUM nodes or field control units. Operating as a switch-mode power supply, it features internal filtering and regulation circuits to protect sensitive microprocessor-based control cards from input line transients and voltage fluctuations. The module is designed with redundant operation capabilities, allowing two PW401 units to run in parallel in a dual-redundant power configuration. If one module fails or loses input power, the second module automatically bears the full load without causing a system reset or control disruption. Front-panel status LEDs provide immediate visual feedback regarding AC input power presence and DC output voltage health.

Product Parameters

Model Name: PW401 Power Supply Module
Input Voltage Range: $100 \text{ V}$ to $120 \text{ VAC}$ or $220 \text{ V}$ to $240 \text{ VAC}$ (auto-sensing or switch-selectable depending on hardware revision)
Input Frequency: $50 \text{ Hz}$ or $60 \text{ Hz}$ nominal
Output Voltage: Regulated $5 \text{ VDC}$ system voltage and internal system distribution voltages
Maximum Output Power: Approximately $100 \text{ W}$ to $150 \text{ W}$ continuous duty rating
Efficiency: Typically greater than 80 percent at full rated load
Dielectric Withstand Voltage: $1500 \text{ VAC}$ between input terminals and system ground for 1 minute
Operating Temperature: $0\text{°C}$ to $50\text{°C}$ ( $32\text{°F}$ to $122\text{°F}$ )
Operating Humidity: 20% to 80% Relative Humidity, non-condensing
Mounting Type: Dedicated slot-mount on CENTUM CS 3000 / CENTUM VP rack backplane

Product Advantages

A primary advantage of the PW401 is its Dual-Redundant Support, which allows for online hot-swapping in high-availability configurations. Maintenance personnel can extract and replace a faulted power supply while the host control unit remains fully operational. The High Noise Immunity built into its input filtering stage prevents electrical noise on the plant main line from reaching the internal system bus, protecting control logic execution.

Its High Reliability MTBF (Mean Time Between Failures) minimizes the probability of hardware failure in continuous 24/7 industrial processes. Furthermore, the module includes Comprehensive Electrical Protection, such as over-voltage, over-current, and thermal shutdown circuits, ensuring that a fault inside the power module does not damage expensive downstream processor or I/O modules on the backplane.

Important Considerations and Precautions

When installing or servicing the PW401, proper AC Input Verification is essential; applying voltages outside the specified operating window can damage internal components before protective fuses trip. When using dual-redundant power supply configurations, ensure that each PW401 receives power from an Independent AC Power Source (such as separate UPS lines) to maximize system fault tolerance.

Because power supplies generate heat during AC-to-DC conversion, maintain clear Ventilation Paths above and below the rack chassis; restricted airflow leads to heat accumulation, shortened component lifespans, or unexpected thermal shutdowns. Always handle the module using ESD (Electrostatic Discharge) Precautions to protect exposed backplane connectors. When hot-swapping a module, ensure the locking mechanism is completely disengaged before pulling, and insert the replacement firmly to ensure full connector seating before locking it into place.

Product Applications

The Yokogawa PW401 is deployed across critical industrial control infrastructure where process downtime is costly or hazardous.

Oil and Gas Refining: Supplying reliable power to DCS nodes managing distillation, cracking, and blending operations.
Chemical and Petrochemical Processing: Powering field control units in continuous reaction loops and batch process controllers.
Power Generation Facilities: Main control cabinet power supply for steam turbine controls, boiler management, and balance-of-plant automation systems.
Pharmaceutical Manufacturing: Used within validated automation hardware where power drops could cause batch loss.
Water and Wastewater Facilities: Powering centralized control racks that manage treatment sequences and distribution pump stations.

AAI835-S50 /K4A0 Yokogawa

We have the same series of models in stock. If you don't find the model you need, please contact us and we will provide you with an official quotation！

YokogawaAFV10D

YokogawaUT55A-040-11-00

YokogawaADV151

YokogawaANB10D

YokogawaAAI143-S

YokogawaAAI543-S

YokogawaADV551

YokogawaSAI143-H63

YokogawaPW301

YokogawaAAI543-H00

YokogawaEB401-10

YokogawaUM-330-00