Description
Product Overview
Compact rack-mount AC-DC power supply module dedicated to powering FC-series I/O chassis and safety instrumented system hardware. It converts wide-range global AC mains input into stabilized 24 VDC isolated DC power for backplane bus distribution, with integrated multi-stage circuit protection for critical safety control hardware.
Technical & Performance Parameters
- AC Input Voltage Range: 85 VAC ~ 264 VAC universal global mains input
- Input Frequency Range: 47 Hz ~ 63 Hz
- Max Input Current: 6.5 A @ 115 VAC, 3.5 A @ 230 VAC
- DC Output Rating: 24 VDC ± 1% regulated, 5 A continuous maximum output current
- Output Ripple & Noise: < 10 mV peak-to-peak
- Power Factor Rating: ≥ 0.90
- Energy Efficiency: ≥ 85% full load efficiency
- Continuous Output Power: 120 W
- Protection Circuits: Overvoltage, overcurrent, short-circuit, over-temperature auto-shutdown
- Operating Temperature: -20 °C ~ +60 °C
- Storage Temperature: -40 °C ~ +70 °C
- Operating Humidity: 0% ~ 95% RH non-condensing
- Protection Class: IP20 front panel dust protection
- Physical Dimensions: 200 mm (H) × 150 mm (W) × 70 mm (D)
- Net Weight: 1.8 kg
- Certifications: CE, UL 508, IEC 61010-1, IEC 61508 SIL 2 Compliant
Material Composition
- Outer enclosure: Cold-rolled steel powder-coated housing with integrated ventilation grilles
- Internal transformer: Copper wound industrial isolation transformer with flame-retardant insulation
- PCB Power Board: 4-layer FR4 high-current PCB with thermal copper heat sink traces
- Heat sink: Extruded aluminum passive cooling heat sink for power switching semiconductors
- Terminal Block: High-current copper screw terminals rated for 10 mm² power wiring
Structural Characteristics
- Standard 19-inch rackmount module form factor compatible with FC-IOCHAS cabinet racks
- Front panel tri-color LED indicators: Input Power OK, Output Normal, Fault Shutdown
- Rear terminal block section separated from control circuit compartment for wiring safety isolation
- Integrated anti-overheat passive aluminum heat sink without auxiliary cooling fan
- Lockable wiring terminal cover to prevent accidental live mains contact
Working Principle
- AC mains input passes through EMI filter circuit to suppress grid voltage harmonics and industrial noise
- Isolated high-frequency switching converter steps down wide-range AC input to regulated 24 VDC output
- Multi-stage voltage/current monitoring circuits continuously validate output stability
- Auto-shutdown protection activates within 10 µs upon detection of overvoltage, short-circuit, or over-temperature conditions
- DC output feeds dual redundant power buses inside FC-IOCHAS I/O chassis for all installed FC-series I/O modules
Core Function Features
- Universal AC input compatible with all global industrial mains voltage standards
- Full galvanic isolation between AC input and DC output circuits (3000 VAC isolation rating)
- Automatic recovery restart after protection shutdown once fault condition clears
- Parallel load-sharing capability for dual redundant power supply deployment in SIS chassis
- Continuous output voltage monitoring with fault alarm signal transmitted to Safety Manager controller via backplane bus
Advantage Highlights
- High-current 5A 24VDC output supports fully populated FC-IOCHAS 18-slot I/O chassis operation
- Multi-layer EMI filtering eliminates mains grid interference affecting safety loop signal accuracy
- Fanless passive cooling design removes mechanical fan failure risk for long-term SIS reliability
- SIL 2 safety certification permits direct deployment on emergency shutdown safety systems
- Compact rackmount footprint minimizes cabinet space consumption compared to external DIN rail power supplies
Applicable Industries
All process industry SIS safety systems, thermal power plant safety control, refinery ESD cabinets, chemical plant hazard protection, offshore platform safety instrumented racks
Installation Requirements
- Mount on 19-inch cabinet rack adjacent to FC-IOCHAS I/O chassis for short DC power wiring runs
- Dual redundant installation requires two FC-PSU-240516 modules wired to separate AC mains supply circuits
- Minimum 30 mm vertical clearance above and below module for passive heat sink airflow
- AC input wiring must use 2.5 mm² minimum copper cable with dedicated circuit breaker protection
- DC output terminals wired directly to chassis dual redundant power bus terminals
Usage Precautions
- Do not operate module with ventilation grilles blocked; permanent overheating component damage occurs
- Maximum two parallel FC-PSU-240516 modules per single FC-IOCHAS chassis load
- Disconnect AC mains circuit breaker before opening terminal cover for wiring maintenance
- Avoid stacking multiple power supply modules without vertical airflow separation
- Annual insulation resistance testing between AC input and DC output circuits required per SIS maintenance schedules





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