Product Overview

The Yokogawa NFPW444-50 provides high-precision DC power specifically for the STARDOM FCN (Field Control Node) Autonomous Controller series. This module converts a 24V DC field supply into a regulated 5.1V DC logic rail, powering the CPU and internal circuitry with deterministic stability. We supply this unit in New & Original Factory Packing, ensuring your distributed control architecture utilizes fresh, Style S2 hardware for maximum uptime and protection against power-line transients.

Part Number Breakdown: NFPW444 Series

• NFPW444: Power Supply Module (24 V DC Input)

• Suffix -5: Standard type with no explosion protection

• Suffix 0: Basic type

• Style S2: Features updated internal power-handling components and improved thermal dissipation over S1 revisions.

Technical Specifications

• Manufacturer: Yokogawa Electric Corporation

• Model Number: NFPW444-50 (Style S2)

• Rated Input Voltage: 24 V DC

• Input Voltage Range: 21.6 to 31.2 V DC

• Rated Output Voltage: +5.1 V DC (Precision Regulated)

• Rated Output Current: 0 to 7.8 A

• Efficiency: ≥ 85%

• Protection Features: Over-voltage, Over-current, Short-circuit protection

• Cooling Method: Natural Convection (Fanless design)

• Operating Temperature: 0 to 55 °C

• Dimensions: 14.65 x 4.97 x 13 cm

• Weight: 0.6 kg (Net) / 1.5 kg (Shipping)

Engineering Advantages

• Optimized DC-DC Conversion: The NFPW444-50 excels in environments where AC power is unavailable or unreliable. It accepts a wide 24V DC input range (21.6 to 31.2 VDC), allowing it to operate directly from battery backup systems or industrial DC buses without additional filtering.

• High-Current Logic Support: Delivering up to 7.8 Amps at 5.1V DC, this module provides the heavy-duty current necessary for high-performance STARDOM CPUs and fully populated communication racks. This ensures your processor never throttles or resets due to voltage drops during peak calculations.

• Elimination of Mechanical Failures: The fanless, natural convection cooling design removes the most common failure point in industrial power supplies. By preventing the intake of dust and metallic particles, the module extends the service life of internal capacitors and transistors.

• Zero-Downtime Redundancy: When installed in a redundant base module, the NFPW444-50 supports 1:1 redundancy. It shares the load with its partner module; should one unit fail, the other instantly assumes the total load to prevent a system-wide process trip.

• Industrial Fault Isolation: Advanced protection circuits safeguard the internal FCN backplane. In the event of an external 24V surge or a field-side short circuit, the module isolates the fault, preventing damage to the expensive CPU and I/O hardware.

FAQs

• Can the NFPW444-50 handle 110V or 220V AC input?No. The NFPW444 is a 24 V DC Input module only. Connecting this module to AC mains will result in immediate hardware failure. Use the NFPW442 variant for AC-to-DC conversion requirements.

• Is the Style S2 compatible with racks originally using S1 modules?Yes. The Style S2 revision maintains full mechanical and electrical backward compatibility with the NFPW444-S1, offering improved efficiency and better transient resilience.

• Does the module support hot-swapping?Yes, provided you mount it on a compatible redundant rack. You can replace a faulty NFPW444-50 while the system is energized, allowing for maintenance without interrupting the plant process.

• Why is "Brand New" condition vital for this module?DC-DC converters like the NFPW444-50 utilize power transistors and electrolytic capacitors that face high thermal stress during current conversion. Used or "New Old Stock" units may have aged components that cannot maintain the 7.8A peak rating. A 100% Brand New unit ensures you receive the full 12-month factory warranty and maximum operational life.