Product Description
YOKOGAWA NFPW444 is a dedicated power supply module for STARDOM FCN‑RTU control system. It accepts 24 VDC input, provides stable 5.1 VDC system power for rack CPU, logic circuits and backplane communication, and supplies 24 VDC analog field power for analog I/O modules and field loops. The module mounts on NFBU200 base unit. Two NFPW444 modules can be configured for 1:1 power redundancy; secondary unit takes over seamlessly upon primary failure to ensure continuous system operation. Built‑in over‑voltage, over‑current and short‑circuit protection with auto‑recovery function. Fan‑less natural convection cooling, back‑plane hot‑plug‑gable modular design for easy maintenance. CE and UL safety certified, IP20 for cabinet‑only installation. Widely used as spare parts for legacy STARDOM systems; available as surplus new, used‑tested and refurbished units on market.
Technical Specifications
| Item | Specification |
|---|---|
| Model | NFPW444 (typical suffix NFPW444‑50) |
| Type | FCN‑RTU Power Supply Module |
| Compatible System | Yokogawa STARDOM FCN‑RTU; Base Unit NFBU200 |
| Input | 24 VDC rated, operating range 21.6‑31.2 VDC; Max input current 3.3A; internal 6.3A fuse; Max inrush current 20A |
| System Output | 5.1 VDC; rated 7.8A; peak 11.8A; rated power 40W, peak 60W |
| Analog Field Output | 24 VDC, max 4A for analog I/O field loops |
| Redundancy | 1:1 hot‑standby redundancy support, bumpless switch‑over |
| Protection | Over‑voltage, over‑current, short‑circuit protection, auto‑recovery |
| Cooling | Natural convection, fan‑less |
| Protection Class | IP20 (cabinet installation only) |
| Ambient Temperature | 0℃ ~ +55℃; derating required above +55℃ |
| Dimensions | 49.7 × 130 × 146.5 mm |
| Weight | Approx. 0.6 kg |
| Certifications | CE, UL |
| Status | Some sub‑models phased out by manufacturer; surplus / used‑tested / refurbished only |
Industry Applications
- Oil & Gas: Remote RTU stations for gas & oil fields and pipelines; redundant power for field process control.
- Petrochemical & Chemical: Power supply for STARDOM DCS/RTU racks in refineries and chemical plants; analog I/O loop power; spare‑part replacement for legacy systems.
- Power Generation: Auxiliary plant control, substation remote monitoring & interlock control systems.
- Water Treatment: Distributed remote monitoring stations for water & waste‑water plants.
- Metallurgy & Building Materials: Distributed RTU racks, power supply for field instruments and I/O modules.
- General Process Industry: Spare‑part service for existing Yokogawa STARDOM FCN‑RTU installations to sustain legacy automation systems.
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