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.
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 |
| 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 |
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.
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.
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