Product Short Description
Product Overview & Brief Introduction
FPD 375.16PC24.4 is a high-efficiency single-output DIN rail switching power supply manufactured by Kniel, engineered for heavy-duty industrial automation control cabinet power distribution. It delivers regulated 24VDC 16A continuous output power (375W total rated power) with universal wide-range AC input, integrated power factor correction and full multi-stage circuit protection for PLC, safety I/O modules, sensor and actuator 24VDC power loads.
Description
Core Technical Specifications & Performance Parameters
- Rated Output Power: 375 Watts total continuous power
- Output Electrical Rating: 24VDC stabilized output voltage, 16A maximum continuous output current
- AC Input Range: Universal single-phase 85–264VAC wide input voltage (47–63Hz)
- Power Factor Correction: Active PFC circuit, power factor ≥0.95 full load operating range
- Conversion Efficiency: Up to 93.5% peak energy efficiency at nominal load
- Output Ripple Noise: <120mV peak-to-peak low ripple DC output for sensitive analog sensor loads
- Overload Protection: Auto-recovery constant current fold-back overload limiting
- Operating Temperature: -20°C ~ +60°C derated above 45°C ambient
- Isolation Rating: 3000VAC reinforced isolation between AC input and DC output circuits
- Parallel Redundancy Support: Built-in load-sharing circuitry for multiple units parallel redundant power systems
Function Features
- Universal worldwide AC input voltage compatibility eliminating regional power supply variant inventory
- Active power factor correction reduces industrial facility reactive power consumption and utility harmonic distortion
- Complete multi-layer circuit protection: Overvoltage, overcurrent, short-circuit, over-temperature shutdown with auto-recovery after fault clearance
- Built-in load-sharing circuitry allows up to 4 identical FPD units parallel connected for redundant 24VDC power distribution
- DC OK relay signal contact output for remote power health monitoring to PLC/Safety Manager systems
- Compact high-power density DIN rail form factor minimizing cabinet space consumption
- EMC Class B industrial electromagnetic compliance for sensitive measurement and safety control environments
- Adjustable output voltage trim potentiometer (22–26VDC output fine tuning for long cable voltage drop compensation)
Working Principle
Wide-range single-phase AC mains power enters the input EMI filter circuit to suppress grid noise interference. Active PFC correction circuitry shapes input current waveform to maintain high power factor, reducing mains harmonic distortion. High-frequency switching MOSFET power conversion circuits step down high AC voltage to stabilized low-ripple 24VDC DC output power, filtered via secondary LC smoothing circuits to deliver clean DC power to industrial control loads. Integrated monitoring circuits continuously track output voltage, current and internal heat sink temperature; out-of-spec operating conditions trigger immediate power shutdown protection. The load-sharing communication bus synchronizes output current across parallel-connected power supplies to evenly distribute total load power demand between redundant units.
Material Composition & Structural Characteristics
- Outer Housing: Black extruded aluminum heat sink enclosure for passive convection cooling
- Main PCB Board: Double-sided FR4 high-temperature printed circuit board with high-current copper power traces
- Power Switch Components: Industrial-grade silicon carbide MOSFET high-frequency switching transistors
- EMI Filter Hardware: Multi-stage wound ferrite core input/output noise suppression inductors
- Terminal Blocks: Screw-type high-current copper terminal blocks rated for 6mm² input/output power cables
- Mounting Hardware: Integrated 35mm DIN rail clip with anti-slip locking mechanism
Installation Requirements
- Vertical DIN rail mounting with unobstructed vertical airflow clearance (minimum 40mm top/bottom spacing)
- AC input wiring protected by dedicated circuit breaker matched to unit input inrush current rating
- Parallel redundant installation requires dedicated load-sharing communication wiring between all connected FPD units
- DC output positive/negative wiring routed separately from AC mains input cables in isolated cable trays
- DC OK relay dry contact wiring connected to safety controller fault monitoring digital input channels
Application Scenarios
- Process plant safety control cabinet SIL-rated 24VDC system power supply
- Automotive manufacturing assembly line PLC and sensor power distribution units
- Packaging machinery heavy-duty solenoid valve 24VDC power sources
- Offshore platform electrical cabinet redundant DC power supply systems
- Pharmaceutical cleanroom automation control panel primary power units
Usage Precautions
- Derate output current by 20% for continuous operation above 45°C cabinet ambient temperature
- Do not connect capacitive load banks exceeding manufacturer specified maximum capacitive load rating to avoid startup inrush current damage
- Verify load-sharing communication wiring polarity during redundant parallel installation to prevent uneven power distribution
- Conduct semi-annual heat sink dust cleaning to maintain passive cooling efficiency and prevent over-temperature shutdown events
- Adjust output trim potentiometer only during off-peak maintenance to avoid overvoltage damage to sensitive safety I/O modules
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