HONEYWELL FC-PSU-UNI2450U V2

Product Overview

Technical & Performance Parameters

• AC Input Voltage Range: 85 VAC ~ 264 VAC universal global mains, 47–63 Hz
• DC Output Rating: 24 VDC ± 0.08% load regulation, 5 A continuous maximum output current
• Output Ripple Noise: < 8 mV peak-to-peak (improved from V1.0 10 mV)
• Full Load Energy Efficiency: 96.5% peak efficiency
• Power Factor Correction: ≥ 0.96 active PFC
• Standby Power Consumption: < 0.8 W no-load standby draw
• Galvanic Isolation Rating: 3500 VAC input-to-output isolation (upgraded from V1.0 3000 VAC)
• Integrated Protection Circuits: OVP, OCP, short-circuit auto-restart, multi-stage thermal shutdown, reverse polarity, surge voltage suppression
• Operating Temperature Range: -40 °C ~ +70 °C (expanded from V1.0 -10 °C ~ +50 °C)
• Storage Temperature: -45 °C ~ +85 °C
• Environmental Protection: IP54 double-layer silicone conformal PCB coating
• Physical Dimensions: Identical to V1.0: 120 mm × 85 mm × 51 mm
• Net Weight: 1.22 kg
• Certifications: CE, UL 508, FCC Class B, ATEX Zone 2, IEC 61508 SIL 3 Full Safety Certification

Material Composition

1. Enclosure: Die-cast aluminum alloy with extended integrated cooling fin array (V2 upgrade)
2. Power PCB: 6-layer FR4 high-current board with dual-layer silicone conformal coating
3. Power Switching Semiconductors: Low Rds(on) silicon carbide MOSFETs for improved thermal efficiency
4. EMI Filter: Three-stage toroidal inductor filter with enhanced surge suppression capacitors
5. Digital Diagnostic Controller: Upgraded 32-bit industrial microcontroller for expanded fault monitoring

Structural Characteristics

• Identical compact half-width 19-inch rackmount form factor as V1.0 for drop-in replacement without cabinet modification
• Expanded front panel LED diagnostic indicators: Input Under-Voltage, Input Over-Voltage, Output Over-Current, Internal Heat Sink Over-Temp, Bus Communication Fault, Module Healthy
• Upgraded load-sharing control IC supports parallel pairing with V1.0 or V2 modules without voltage imbalance
• Sealed IP54 enclosure with improved dust/moisture ingress resistance for unconditioned industrial cabinet environments
• Backplane communication connector pinout fully backward compatible with V1.0 chassis IOBUS interfaces

Working Principle

1. AC mains input passes through three-stage EMI surge filter and upgraded active power factor correction circuit
2. Silicon carbide soft-switching converter generates ultra-low-ripple regulated 24 VDC isolated output with reduced heat generation
3. 32-bit microcontroller samples 12 independent power supply operating parameters at 10 ms scan intervals
4. Cross-revision compatible load-sharing logic dynamically balances output current between mixed V1.0/V2 parallel module pairs
5. Granular fault diagnostic data transmitted via chassis backplane bus with individual fault code logging to Experion PKS central historian

Core Function Features

1. Cross-revision parallel compatibility enables staged cabinet upgrades without full power supply replacement
2. Expanded -40 °C low-temperature operating range supports outdoor unheated control cabinet deployment
3. Enhanced 3500 VAC isolation rating improves protection against plant mains transient voltage surges
4. Double-layer conformal PCB coating extends service life in high-humidity, salt-air offshore environments
5. Granular fault code diagnostic reporting simplifies remote troubleshooting via central DCS HMI

Advantage Highlights

1. Improved silicon carbide power semiconductors reduce cabinet heat load by 12% vs V1.0 hardware
2. Wider operating temperature range eliminates need for cabinet heating/cooling systems in remote plant locations
3. Backward mechanical and electrical compatibility reduces spare parts inventory costs for mixed V1.0/V2 systems
4. Higher surge suppression circuit withstands industrial grid lightning transient voltage events without module shutdown
5. SIL 3 certified with expanded fault coverage to reduce spurious safety system power feed trips

Applicable Industries

Installation Requirements

1. Compatible for parallel redundant installation with FC-PSU-UNI2450U V1.0 modules in paired rack positions
2. Independent AC mains circuit breakers mandatory for each parallel power supply unit
3. Minimum 20 mm horizontal airflow clearance between adjacent power modules
4. DC output wiring minimum 4 mm² copper cable connected to FC-IOCHAS dual redundant power bus terminals
5. Backplane IOBUS communication wiring required to transmit full diagnostic fault codes to central safety processors

Usage Precautions

1. Mixed V1.0/V2 parallel pairs must be configured via Experion PKS engineering workstation to enable cross-revision load-sharing algorithm
2. V2 module maximum continuous output current derated to 4.5 A when paired with V1.0 hardware to match V1.0 thermal limits
3. Double-layer conformal coating prohibits on-site PCB repair; module replacement required upon internal circuit failure
4. Avoid enclosure ventilation fin blockage at all operating temperatures to prevent thermal shutdown
5. Spare V2 modules may be installed as direct drop-in replacement for failed V1.0 units without cabinet wiring modification