Product Overview

The Yokogawa NFPW442-50 (Style S2) serves as the primary energy conversion interface for the STARDOM FCN (Field Control Node) Autonomous Controller and FCN-RTU systems. This compact, rack-mountable module transforms a wide range of AC input into precision-regulated 24V DC power, sustaining the CPU's logic processing and I/O module communication. We supply this unit in New & Original Factory Packing, ensuring your distributed control architecture utilizes factory-fresh components for mission-critical reliability in process automation.

Part Number Breakdown: NFPW442 Series

• NFPW442: Base Power Supply Module (100–240 V AC / 220–240 V AC support).

• Suffix -5: Standard type designed for non-explosion environments.

• Suffix 0: Basic type configuration for general industrial racks.

• Suffix 1 (Optional): Includes ISA Standard G3 conformal coating for corrosive environments.

• Style S2: Features the latest internal board layout for improved thermal management and higher transient suppression compared to older S1 versions.

Technical Specifications

• Manufacturer: Yokogawa Electric Corporation

• Model Number: NFPW442-50 (Style S2)

• Input Voltage: 100–240 V AC, 50/60 Hz

• Output Voltage: 24 V DC (Regulated ±1%)

• Output Power: 50 Watts

• Efficiency: ≥ 85%

• Cooling Method: Natural Convection (Fanless design)

• Redundancy Support: Yes, supports 1:1 dual redundant operation

• Operating Temperature: 0 to 55 °C

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

• Dimensions: 50 × 130 × 146 mm

• Country of Origin: Japan

Engineering Advantages

• Optimized Thermal Reliability: The NFPW442-50 utilizes a fanless, natural convection cooling design. By eliminating mechanical moving parts, Yokogawa removes the primary failure point found in lower-tier power supplies, preventing the intake of industrial dust and metallic particles into the circuitry.

• Deterministic Redundancy: When installed in pairs, these modules support active load sharing. If a primary power source fails or a module malfunctions, the redundant partner instantly assumes the full electrical load without a voltage dip, preventing catastrophic CPU resets or data loss.

• Space-Efficient 50W Architecture: The compact width (approx. 50mm) allows for high-density deployments in small-scale control cabinets. This solves the industrial pain point of limited cabinet space in offshore platforms or remote wellhead telemetry stations.

• Precision Voltage Regulation: The module maintains a strict 24V DC output across the entire 100–240V AC input spectrum. This precision protects sensitive analog I/O modules from input fluctuations and ensures high-accuracy signal conversion for process instruments.

• Hot-Swap Maintainability: Depending on your rack configuration, the NFPW442-50 supports hot-swapping. Maintenance personnel can replace a faulty power module while the controller remains live, eliminating the need for expensive plant shutdowns during routine maintenance.

FAQs

• Is the NFPW442-50 compatible with the NFPW442-51?Yes. The NFPW442-51 is functionally equivalent but includes the ISA Standard G3 option for protection against corrosive gases. You can often use the -51 as a high-spec replacement for the -50 in standard environments.

• What is the significance of the "Style S2" designation?Style S2 indicates an engineering revision that improves component longevity and thermal efficiency. It remains fully backward compatible with racks originally designed for Style S1 modules.

• Can this module power 24V field devices directly?While the NFPW442-50 provides regulated 24V DC, its primary role is to power the backplane and FCN-RTU hardware. For heavy field loads (valves, motors), we recommend a dedicated field power supply to prevent noise interference with the controller logic.

• Why must I purchase "Brand New" for a power module?Power modules contain electrolytic capacitors that dry out and degrade over time, even in storage. A 100% Brand New NFPW442-50 guarantees a full chemical lifecycle and maximum efficiency, whereas pre-owned or "new old stock" units carry a significantly higher risk of premature failure.