YOKOGAWA NFPW442-50 Power Supply
Configured for high-efficiency DC voltage conversion in STARDOM control station nodes, the Yokogawa NFPW442-50 (NFPW442 Power Supply Module) provides direct physical/electrical execution. It transforms 220 to 240 V AC mains input into a regulated +5.1 V DC output rail required to energize internal backplane buses and system controller electronics.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NFPW442-50 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.6 kg |
| Dimensions | 49.7 mm x 130 mm x 146.5 mm |
| Operating Temp | 0 to 50 deg C |
| Power Consumption | Total output 40 W (60 W peak) |
| Rated Input Voltage | 220 to 240 V AC (170 to 264 V AC rms range) |
| Input Frequency | 47 to 66 Hz (50/60 Hz nominal) |
| Max Input Current | 0.7 A |
| Inrush Current | 90 A for 5 ms or less |
| Rated Output Voltage | +5.1 V DC |
| Rated Output Current | 0 to 7.8 A (Peak 11.8 A) |
| Protection Limits | Overvoltage max 7 V; Overcurrent shutdown min 105% after 4 to 14 s |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The NFPW442-50 incorporates internal galvanic isolation and filtering to prevent line noise and high-voltage surges from coupling onto the internal backplane bus. By maintaining an insulation resistance of 50 MΩ at 500 V DC and standard withstanding voltage limits of 500 V AC for 1 minute, the module insulates control processing units from AC supply fluctuations. This isolated supply foundation prevents ground loops and electrical interference from degrading signals on adjacent analog I/O cards and 4-20 mA HART loop communication circuits.
Frequently Asked Questions
Q: How quickly does the NFPW442-50 establish stable output voltage upon mains power energization?
A: The NFPW442-50 achieves nominal output voltage stability within a startup time of maximum 100 ms following AC power application.
Q: What protection behavior occurs if an overcurrent condition persists on the output rail?
A: The module triggers overcurrent protection when output load exceeds a minimum of 105%, initiating automatic output shutdown after 4 to 14 seconds of sustained overcurrent.
Field Installation Guidelines
- Ensure input power cables are de-energized prior to inserting or removing the NFPW442-50 from the STARDOM node chassis slot.
- Confirm the main system earth ground is securely bonded to the chassis grounding point to preserve the 500 V AC dielectric isolation capability.
- Route incoming AC power leads separately from sensitive low-voltage instrumentation and field signal cabling within cabinet wire channels.
YOKOGAWA NFPW442-50 Power Supply
YOKOGAWA NFPW442-50 Power Supply
Configured for high-efficiency DC voltage conversion in STARDOM control station nodes, the Yokogawa NFPW442-50 (NFPW442 Power Supply Module) provides direct physical/electrical execution. It transforms 220 to 240 V AC mains input into a regulated +5.1 V DC output rail required to energize internal backplane buses and system controller electronics.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NFPW442-50 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.6 kg |
| Dimensions | 49.7 mm x 130 mm x 146.5 mm |
| Operating Temp | 0 to 50 deg C |
| Power Consumption | Total output 40 W (60 W peak) |
| Rated Input Voltage | 220 to 240 V AC (170 to 264 V AC rms range) |
| Input Frequency | 47 to 66 Hz (50/60 Hz nominal) |
| Max Input Current | 0.7 A |
| Inrush Current | 90 A for 5 ms or less |
| Rated Output Voltage | +5.1 V DC |
| Rated Output Current | 0 to 7.8 A (Peak 11.8 A) |
| Protection Limits | Overvoltage max 7 V; Overcurrent shutdown min 105% after 4 to 14 s |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The NFPW442-50 incorporates internal galvanic isolation and filtering to prevent line noise and high-voltage surges from coupling onto the internal backplane bus. By maintaining an insulation resistance of 50 MΩ at 500 V DC and standard withstanding voltage limits of 500 V AC for 1 minute, the module insulates control processing units from AC supply fluctuations. This isolated supply foundation prevents ground loops and electrical interference from degrading signals on adjacent analog I/O cards and 4-20 mA HART loop communication circuits.
Frequently Asked Questions
Q: How quickly does the NFPW442-50 establish stable output voltage upon mains power energization?
A: The NFPW442-50 achieves nominal output voltage stability within a startup time of maximum 100 ms following AC power application.
Q: What protection behavior occurs if an overcurrent condition persists on the output rail?
A: The module triggers overcurrent protection when output load exceeds a minimum of 105%, initiating automatic output shutdown after 4 to 14 seconds of sustained overcurrent.
Field Installation Guidelines
- Ensure input power cables are de-energized prior to inserting or removing the NFPW442-50 from the STARDOM node chassis slot.
- Confirm the main system earth ground is securely bonded to the chassis grounding point to preserve the 500 V AC dielectric isolation capability.
- Route incoming AC power leads separately from sensitive low-voltage instrumentation and field signal cabling within cabinet wire channels.
