Honeywell FC-PSU-UNI2450U V1

Product Overview

Technical & Performance Parameters

• AC Input Range: 85 VAC ~ 264 VAC universal mains, 47–63 Hz
• DC Output Specification: 24 VDC ± 0.1% load regulation, 5 A continuous rated output current
• Output Ripple Noise: < 10 mV peak-to-peak
• Full Load Efficiency: 96% maximum energy efficiency
• Power Factor: ≥ 0.95 active power factor correction
• Standby Power Consumption: < 1 W no-load standby draw
• Isolation Rating: 3000 VAC input-to-output galvanic isolation
• Protection Functions: OVP, OCP, short-circuit auto-restart, thermal shutdown, reverse polarity protection
• Operating Temperature: -10 °C ~ +50 °C
• Storage Temperature: -20 °C ~ +70 °C
• Environmental Protection: IP54 conformal coated internal circuits
• Physical Dimensions: 120 mm (H) × 85 mm (W) × 51 mm (D)
• Net Weight: 1.2 kg
• Certifications: CE, UL 508, FCC Class B, IEC 61508 SIL 3 Certified

Material Composition

1. Housing: Die-cast aluminum alloy enclosure with integrated cooling fins
2. Power PCB: 6-layer high-current FR4 PCB with full silicone conformal coating
3. Switching Components: Industrial-grade MOSFET power semiconductors with bonded aluminum heat sinks
4. EMI Filter: Multi-stage wound toroidal inductor filter for mains noise suppression
5. Terminals: Nickel-plated copper screw terminals for AC input and DC output wiring

Structural Characteristics

• Compact 19-inch half-width rackmount module design for dual redundant side-by-side installation
• Front panel LED status indicators: Input Active, Output Healthy, Over-Temp Fault, Communication Bus Fault
• Internal digital diagnostic circuit communicates power supply health data via FC backplane IOBUS
• Integrated load-sharing control circuit for synchronized parallel redundant operation
• Sealed enclosure with IP54 dust/moisture resistance for lightly ventilated cabinet environments

Working Principle

1. Wide-range AC mains input passes through multi-stage EMI filter and active power factor correction circuit
2. High-frequency soft-switching converter generates ultra-stable 24 VDC isolated output with minimal ripple
3. Digital monitoring IC continuously samples output voltage, output current, internal temperature, and input mains status
4. Built-in load-sharing logic synchronizes output voltage between two parallel FC-PSU-UNI2450U modules for balanced power distribution
5. Fault diagnostic data transmitted to FC-QPP quad processors via chassis backplane bus for central DCS alarm logging

Core Function Features

1. Active power factor correction eliminates industrial mains reactive power waste
2. Digital load-sharing enables seamless 1:1 redundant parallel power deployment without external balancing hardware
3. Conformal coated PCB internal circuits resist cabinet humidity and chemical vapor corrosion
4. SIL 3 safety integrity certified for high-risk ESD safety instrumented system power feeds
5. Low standby power draw reduces long-term facility energy consumption for idle redundant power modules

Advantage Highlights

1. 96% peak efficiency reduces cabinet waste heat generation compared to standard FC-PSU-240516 models
2. IP54 internal circuit protection eliminates need for sealed control cabinets in moderate industrial environments
3. Built-in digital diagnostic bus provides real-time power supply health monitoring via Experion PKS HMI
4. Ultra-tight ±0.1% load regulation maintains precise 24 VDC power for sensitive analog safety I/O modules
5. Soft-switching converter design minimizes high-frequency EMI interference with plant sensor wiring

Applicable Industries

Installation Requirements

1. Mount as paired dual modules on 19-inch rack for redundant power bus feeding to FC-IOCHAS chassis
2. Separate AC mains circuit breakers required for each parallel UNI2450U module to eliminate shared input failure
3. Minimum 20 mm horizontal spacing between paired modules for cross-flow heat dissipation
4. DC output wiring connected to chassis dual redundant power bus terminals with 4 mm² copper cable minimum
5. Backplane communication bus wiring must be connected to chassis IOBUS-HB2 interface for diagnostic data transmission

Usage Precautions

1. V1.0 hardware revision does not support mixed parallel deployment with V2 revision modules; voltage balancing mismatch occurs
2. Do not install module in ambient temperature exceeding +50 °C; permanent thermal degradation of power semiconductors
3. Conformal coating prohibits on-site PCB repair; full module replacement required upon internal circuit failure
4. Verify firmware compatibility with FC-QPP quad processors before cabinet integration
5. Avoid direct liquid contact with enclosure ventilation fins; IP54 rating does not permit water splash exposure