Configured for stable power distribution in CENTUM CS-series control stations, the Yokogawa PW301-S4 (PW301 Power Supply Module) provides direct electrical conversion of AC mains into regulated 5 VDC and 24 VDC outputs for backplane electronics and CPU logic.
The PW301 utilizes specific suffixes to denote input voltage requirements and configuration. Verify the primary AC input rating before installation to ensure compatibility with local power infrastructure.
| Model Suffix | Input Voltage Range | Primary Output |
|---|---|---|
| PW301-S4 | 100-120 VAC / 200-240 VAC | 5 VDC @ 20 A / 24 VDC @ 3 A |
| Parameter | Specification |
|---|---|
| Model | PW301-S4 |
| Brand | Yokogawa |
| Origin | Singapore |
| Weight | 3.0 kg to 3.5 kg |
| Dimensions | 280 x 100 x 280 mm |
| Operating Temp | 0 deg C to +55 deg C |
| Power Consumption | Dependent on system load |
| Logic Output | 5 VDC @ 20 A |
| Auxiliary Output | 24 VDC @ 3 A |
The PW301 maintains operational integrity through robust internal regulation circuits. The design implements channel-to-channel isolation to prevent noise propagation from auxiliary 24 VDC loops back into the 5 VDC CPU logic rails. When operating in dual-redundant configurations, the module manages current sharing to ensure seamless transition if a single unit fails. The architecture facilitates cold junction compensation (CJC) stability for connected I/O modules by maintaining precise voltage regulation despite fluctuations in input frequency or line impedance.
Q: Does the PW301 support hot-swap replacement?
A: The module is designed for hot-swap operations within a redundant pair, provided the installation rack is equipped with the appropriate backplane connectors that support safe disconnection while the system is energized.
Q: How should I verify the operational health of the power supply?
A: Monitor the front-panel LED indicators. A constant illumination indicates normal voltage output. Flashing indicators suggest an overvoltage, overcurrent, or thermal trip condition; verify the load distribution if a fault is indicated.
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