PW401 Yokogawa DCS Series Datasheet & Technical Manual

Yokogawa PW401 Power Supply Module CENTUM DCS and ProSafe-RS

Yokogawa PW401 Power Supply Module CENTUM DCS and ProSafe-RS

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Yokogawa PW401 Power Supply Module The Yokogawa PW401 Power Supply Module, also cataloged as the PW401 Power Supply, serves as...

SKU: PW401

Manufacturer: Yokogawa
Product No.: PW401
Product Type: Power Supply Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 1200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa PW401 Power Supply Module

The Yokogawa PW401 Power Supply Module, also cataloged as the PW401 Power Supply, serves as the primary hardware component utilized to execute regulated DC voltage distribution across CENTUM DCS, CENTUM VP, and ProSafe-RS platforms. It provides direct electrical conversion from AC input to controlled DC output for CPUs, I/O modules, and associated control-station electronics within mission-critical architectures.

Suffix Breakdown & Model Matrix

The PW401 series utilizes specific suffixes to designate voltage output and physical form factors. Ensure the selected model aligns with the specific backplane or rack requirements of the installation:

Model Suffix	Output Voltage	Application
PW401	24 VDC	CENTUM DCS
PW401-S2	24 VDC	Standard Control Station
PW401-S4	5 VDC / 20 A	CENTUM VP / ProSafe-RS

Hardware Specifications

Parameter	Specification
Model	PW401
Brand	Yokogawa
Input Voltage	85-264 VAC / 100-240 VAC (Model Dependent)
Output Current	Up to 20 A (S4 variant)
Operating Temp	-20 deg C to +60 deg C
Weight	1.2 kg - 3.26 kg (Model Dependent)
Dimensions	5.08 x 20.32 x 20.32 cm (S2 variant)
Power Consumption	Model Dependent

Process Control & Power Distribution

The module facilitates stable power delivery through dedicated internal circuitry designed to mitigate voltage fluctuations. Integral to the Yokogawa DCS ecosystem, it supports channel-to-channel isolation and load sharing in redundant power configurations. The module is engineered to provide cold junction compensation (CJC) stability for peripheral I/O modules, ensuring that transient AC input variations do not compromise the DC rail integrity required for deterministic controller logic processing.

Frequently Asked Questions (FAQ)

Q: Does the PW401 support hot-swap replacement under load?

A: Yes, the module is designed for hot-swap capability. It allows for field replacement without necessitating a full shutdown of the associated control station, provided that redundant power supplies are active and the backplane configuration permits.

Q: How does the unit manage thermal dissipation in high-density racks?

A: The chassis is constructed to utilize convection cooling. Ensure that ventilation clearances are maintained according to the rack specification to prevent thermal derating of the internal components.

Field Installation Guidelines

Mounting: Ensure the PW401 is securely seated into the designated DCS/SIS backplane slot. Confirm that the mechanical locking mechanism engages fully to maintain proper electrical contact with the bus.
Wiring: Use shielded, twisted-pair cabling for power distribution to minimize electromagnetic interference (EMI). Ensure that input AC terminals are tightened to manufacturer-specified torque limits to prevent resistive heating at the contact point.
Grounding: Maintain a low-impedance connection to the system ground bus. The metal chassis must be bonded to the cabinet ground to ensure effective surge protection and noise immunity.
Inspection: Periodically check the diagnostic LED indicators for power status. A steady state confirms nominal operation; flashing indicators typically signal an overvoltage or current-limit condition requiring investigation of the connected load.

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