The Yokogawa PW402 is a power supply module designed for the CENTUM VP and CENTUM CS 3000 distributed control systems (DCS). It is installed in a dedicated power supply nest within the Field Control Station (FCS) and converts AC line voltage into the stable DC power required by the system's CPU, communication bus, and I/O modules. The module supports dual-redundant configuration, ensuring continuous operation even if one unit fails.
Item No :
PW402Order(MOQ) :
1Payment :
EXWProduct Origin :
JapanShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
3kgPRODUCT INFORMATIOM
PW402 Power Supply
| Brand Name: | Yokogawa | Condition: | 100%New And Original |
| Product Name: | PW402 | Warranty: | 1Year |
| MOQ: | 1Piece | Packing: | Original Packing |
OVERVIEW
The Yokogawa DCS MODULE is an input/output module designed by Yokogawa for its CENTUM series of distributed control systems (DCS).
These modules offer high performance and a wide range of functions to meet the needs of a wide range of control systems. As an important part
of the CENTUM system, Yokogawa DCS MODULE plays a key role in the field of industrial automation and process control.
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Q1: What is the Yokogawa PW402 used for?
It is a power supply module for Yokogawa CENTUM VP / CS 3000 DCS systems, providing regulated DC power to the CPU, communication bus, and I/O modules within the Field Control Station .
Q2: What are the exact output specifications?
This is the most critical point of confusion. The most frequently cited specification for the CENTUM PW402 is +5.1V DC at 20A (102W) . However, other sources claim 24V DC output or dual 5V/24V outputs . You must obtain the official Yokogawa datasheet for the exact order number (including any suffix) to confirm the output voltage and current.
Q3: Does the PW402 support redundancy?
Yes, it is designed to be installed in pairs for dual-redundant configuration, ensuring continuous operation if one module fails .
Q4: What is the input voltage?
Sources cite 100–120 VAC or 200–240 VAC (selectable), or a wide range of 100–240 VAC .
Q5: What is the difference between PW402 and PW401?
One source describes the PW402 as a "next-generation redundant power supply" with enhanced precision (±0.3V vs. ±0.5V) and higher surge immunity compared to the PW401 . However, this source's specifications (24V, 20A, 4kV surge) conflict with other sources describing the PW402 as a 5.1V CENTUM power supply. Verify the exact model relationship with Yokogawa.
Q6: What is the difference between PW402 and PW402 S2?
The S2 suffix indicates a style revision. One source describes the PW402 S2 as a +5.1V, 20A, 102W module . Confirm the exact compatibility of the S2 variant with your system revision.
Q7: Is this a current or legacy product?
The PW402 is associated with CENTUM VP / CS 3000 systems, which are mature platforms. Confirm current product status and availability with Yokogawa or an authorized distributor.
Q8: Where can I get technical documentation?
Official Yokogawa documentation is essential. The third-party search results are unreliable and contradictory. Contact Yokogawa or an authorized distributor directly for the datasheet matching your exact order number.
| Model | Description | When to Choose |
|---|---|---|
| PW402 | Power Supply Module for CENTUM VP / CS 3000 | When replacing or stocking spares for existing CENTUM installations (confirm exact variant and availability) |
| PW402 S2 | Style S2 revision of the PW402 | When the S2 revision is required for your specific system (confirm compatibility) |
| PW401 | Predecessor power supply module | When an older CENTUM system requires a compatible predecessor (confirm with Yokogawa) |
| PW481 / PW482 / PW484 | Power supply modules for CENTUM VP / CS 3000 (newer generation) | When a current-generation Yokogawa DCS power supply is required (consult Yokogawa) |
| PW601 / PW602 / PW604 | 24V DC output power supplies for FIO fieldbus applications | When a dedicated 24V DC fieldbus power supply is required (different application) |
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