Yokogawa NFPW441-50 Power Supply Module
The Yokogawa NFPW441-50, also cataloged as the NFPW441 Power Supply Module, serves as the primary NFPW441 Power Supply Module utilized to execute primary power conversion across STARDOM control station platforms. It transforms 100-120 V AC incoming mains distribution into dual-regulated output rails consisting of +5.1 V DC for system backplane electronics and 24 V DC for field device excitation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NFPW441-50 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.6 kg |
| Dimensions | Standard STARDOM module slot format |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | Dual output system and field load profile |
| Input Voltage | 100-120 V AC |
| Output Voltage | +5.1 V DC (7.8 A) and 24 V DC (4 A) |
| Humidity | 5% to 95% RH (non-condensing) |
| Diagnostics | SYS LED (+5.1 V DC ON), FLD LED (24 V DC ON) |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The NFPW441-50 incorporates internal switching regulation and physical isolation barriers that prevent AC line noise from transferring to downstream system backplane logic. By providing a clean, ripple-free 24 V DC auxiliary supply rail, the module powers local loop transmitters while preserving channel-to-channel isolation. This stable supply foundation minimizes common-mode interference on connected I/O channels, protecting 4-20 mA HART loop communication networks against power line ripple and voltage sagging.
Frequently Asked Questions
Q: Can the NFPW441-50 module be replaced without removing AC mains power from the entire rack?
A: Yes, the NFPW441-50 features a hot-swappable architecture that enables module replacement during system operation when used in redundant node power configurations, preventing control station downtime.
Q: How do the local panel LEDs indicate the operational state of the dual DC output rails?
A: The front panel includes a green SYS LED that illuminates when the +5.1 V DC internal system backplane rail is active, and a FLD LED that indicates active status for the 24 V DC field device power rail.
Field Installation Guidelines
- Confirm the node base chassis is securely grounded to a local protective earth bar before seating the power supply module into its dedicated backplane slot.
- Slide the NFPW441-50 firmly into the chassis guide rails until the backplane multi-pin connectors engage completely, then hand-tighten the module mounting screws.
- Route incoming 100-120 V AC mains wiring through dedicated high-voltage channels, maintaining physical separation from low-voltage field signal and bus cables.
Yokogawa NFPW441-50 Power Supply Module
Yokogawa NFPW441-50 Power Supply Module
The Yokogawa NFPW441-50, also cataloged as the NFPW441 Power Supply Module, serves as the primary NFPW441 Power Supply Module utilized to execute primary power conversion across STARDOM control station platforms. It transforms 100-120 V AC incoming mains distribution into dual-regulated output rails consisting of +5.1 V DC for system backplane electronics and 24 V DC for field device excitation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | NFPW441-50 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.6 kg |
| Dimensions | Standard STARDOM module slot format |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | Dual output system and field load profile |
| Input Voltage | 100-120 V AC |
| Output Voltage | +5.1 V DC (7.8 A) and 24 V DC (4 A) |
| Humidity | 5% to 95% RH (non-condensing) |
| Diagnostics | SYS LED (+5.1 V DC ON), FLD LED (24 V DC ON) |
4-20 mA HART Loop Protocol & Channel-to-Channel Isolation
The NFPW441-50 incorporates internal switching regulation and physical isolation barriers that prevent AC line noise from transferring to downstream system backplane logic. By providing a clean, ripple-free 24 V DC auxiliary supply rail, the module powers local loop transmitters while preserving channel-to-channel isolation. This stable supply foundation minimizes common-mode interference on connected I/O channels, protecting 4-20 mA HART loop communication networks against power line ripple and voltage sagging.
Frequently Asked Questions
Q: Can the NFPW441-50 module be replaced without removing AC mains power from the entire rack?
A: Yes, the NFPW441-50 features a hot-swappable architecture that enables module replacement during system operation when used in redundant node power configurations, preventing control station downtime.
Q: How do the local panel LEDs indicate the operational state of the dual DC output rails?
A: The front panel includes a green SYS LED that illuminates when the +5.1 V DC internal system backplane rail is active, and a FLD LED that indicates active status for the 24 V DC field device power rail.
Field Installation Guidelines
- Confirm the node base chassis is securely grounded to a local protective earth bar before seating the power supply module into its dedicated backplane slot.
- Slide the NFPW441-50 firmly into the chassis guide rails until the backplane multi-pin connectors engage completely, then hand-tighten the module mounting screws.
- Route incoming 100-120 V AC mains wiring through dedicated high-voltage channels, maintaining physical separation from low-voltage field signal and bus cables.
