Yokogawa PW401 S2 Power Supply
The Yokogawa PW401 S2, also cataloged as the PW401 Power Supply Module, operates as a dedicated hardware component for converting wide-range AC/DC input power into regulated low-voltage DC power within CENTUM VP / CS 3000 Field Control Station (FCS) architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PW401 S2 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 1.54 kg (3.4 lbs) |
| Dimensions | 166 x 64 x 36 mm |
| Operating Temp | -10 deg C to +50 deg C |
| Output Power | 102 W nominal |
| Input Voltage Range | 85-264 VAC / 100-370 VDC |
| Output Voltage Range | 24-60 VDC adjustable |
| Output Current | 1-10 A (load dependent) |
| Efficiency | Up to 96% |
| Power Factor | 0.95 |
| Protection Rating | IP20 |
Galvanic Isolation and Power Conditioning Architecture
The module incorporates high-frequency transformer coupling to establish electrical isolation between primary AC supply lines and downstream control circuitry. This internal switching topology suppresses line transients and prevents common-mode noise propagation onto the system backplane bus. Passive heat-sink conduction and active power factor correction (0.95) optimize power conversion while preserving thermal limits during continuous operation. Output regulation feedback loops ensure strict channel voltage tolerance for analog input/output subsystems and cold junction compensation (CJC) field terminations.
Frequently Asked Questions
Q: What input power sources are supported by the PW401 S2 input terminal block?
A: The module accepts single-phase AC line power from 85 to 264 VAC or direct-current supplies from 100 to 370 VDC without physical jumper reconfigurations.
Q: Can the output DC bus voltage be adjusted in the field?
A: Yes, the DC output stage can be adjusted between 24 VDC and 60 VDC to suit specific Field Control Station and I/O module bus voltage requirements.
Field Installation Guidelines
- Mount the module vertically into the designated power supply slot of the DCS base rack, ensuring the rear backplane connectors align fully before securing the retention screws.
- Verify that line power is de-energized before connecting input conductors to the primary terminal block.
- Route field wiring with sufficient separation from high-noise power lines to limit electromagnetic interference.
- Maintain a minimum of 50 mm clearance above and below the module ventilation slots to ensure passive airflow dissipation within IP20 rated control enclosures.
- Apply input voltage and verify DC output bus regulation within expected operating bounds prior to commissioning downstream I/O cards.
Yokogawa PW401 S2 Power Supply
Yokogawa PW401 S2 Power Supply
The Yokogawa PW401 S2, also cataloged as the PW401 Power Supply Module, operates as a dedicated hardware component for converting wide-range AC/DC input power into regulated low-voltage DC power within CENTUM VP / CS 3000 Field Control Station (FCS) architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PW401 S2 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 1.54 kg (3.4 lbs) |
| Dimensions | 166 x 64 x 36 mm |
| Operating Temp | -10 deg C to +50 deg C |
| Output Power | 102 W nominal |
| Input Voltage Range | 85-264 VAC / 100-370 VDC |
| Output Voltage Range | 24-60 VDC adjustable |
| Output Current | 1-10 A (load dependent) |
| Efficiency | Up to 96% |
| Power Factor | 0.95 |
| Protection Rating | IP20 |
Galvanic Isolation and Power Conditioning Architecture
The module incorporates high-frequency transformer coupling to establish electrical isolation between primary AC supply lines and downstream control circuitry. This internal switching topology suppresses line transients and prevents common-mode noise propagation onto the system backplane bus. Passive heat-sink conduction and active power factor correction (0.95) optimize power conversion while preserving thermal limits during continuous operation. Output regulation feedback loops ensure strict channel voltage tolerance for analog input/output subsystems and cold junction compensation (CJC) field terminations.
Frequently Asked Questions
Q: What input power sources are supported by the PW401 S2 input terminal block?
A: The module accepts single-phase AC line power from 85 to 264 VAC or direct-current supplies from 100 to 370 VDC without physical jumper reconfigurations.
Q: Can the output DC bus voltage be adjusted in the field?
A: Yes, the DC output stage can be adjusted between 24 VDC and 60 VDC to suit specific Field Control Station and I/O module bus voltage requirements.
Field Installation Guidelines
- Mount the module vertically into the designated power supply slot of the DCS base rack, ensuring the rear backplane connectors align fully before securing the retention screws.
- Verify that line power is de-energized before connecting input conductors to the primary terminal block.
- Route field wiring with sufficient separation from high-noise power lines to limit electromagnetic interference.
- Maintain a minimum of 50 mm clearance above and below the module ventilation slots to ensure passive airflow dissipation within IP20 rated control enclosures.
- Apply input voltage and verify DC output bus regulation within expected operating bounds prior to commissioning downstream I/O cards.
