Description
Honeywell FC-PSU-UNI2450CCV2
Technical Specifications
- Input Voltage Range: 85VAC to 264VAC, single phase
- Input Frequency: 47Hz to 63Hz
- Output Rated Voltage: 24VDC
- Maximum Output Power: 450W
- Maximum Output Current: 18.75A
- Working Ambient Temperature: -20°C to +70°C
- Storage Temperature: -40°C to +85°C
- Relative Humidity: 5% to 95% RH, non-condensing
- Isolation Rating: 2000VAC between input side and output side
- Mounting Method: Hot-swappable plug-in installation on SIS rack slot
- Certification: TÜV SIL2, UL, C-UL, CE, ISA G3, RoHS
- Coating Type: Acrylic conformal coating for PCB
Functional Features It supports hot swap replacement without powering down the whole safety rack. It enables parallel redundant configuration with identical FC-PSU-UNI2450 series units. It implements overvoltage, overcurrent, short circuit and overtemperature protection. It continuously monitors output voltage, internal temperature and input power status. It sends fault alarm signal to Safety Manager controller via backplane diagnostic channel. It provides independent LED indicators for power normal, fault and redundant status. It has inrush current limiting circuit to suppress surge when rack powers on. It maintains stable 24VDC output under ±10% input voltage fluctuation.
Application Scenarios Petrochemical SIS safety instrumented system rack power supply Offshore oil and gas platform safety control cabinet power Refinery emergency shutdown system power backup Chemical plant toxic and flammable process safety control Natural gas compressor station ESD system power supply Coastal corrosive environment SIS spare part replacement
Performance Parameters
- Output Voltage Regulation Accuracy: ±0.5% full load
- Ripple and Noise: Less than 120mV peak to peak
- Mean Time Between Failures: 780000 hours
- Redundancy Switchover Time: Less than 8ms
- EMC Surge Withstand: 2kV line to earth
- Hold-up Time: 20ms at rated full load
Material Composition FR4 flame retardant PCB with conformal acrylic coating High frequency switching power MOSFET components Isolation power transformer Shunt current sampling resistors Temperature sensing NTC thermistor TVS surge suppression diodes ABS flame retardant front panel with marking Tri-color LED status indicators Metal locking buckle and gold finger connector
Structural Features Standard plug-in rack module form factor matching Safety Manager rack. Front panel integrates power, fault and redundancy status LED indicators. Side anti-key notch prevents reverse insertion and wrong model mating. Rear gold finger contacts connect to rack power backplane. Internal circuit layout separates high-voltage input zone and low-voltage 24VDC output zone. Built-in cooling air channel for passive heat dissipation. Locking clip secures module firmly against rack vibration.
Working Principle AC mains input passes through EMI filter and rectifier circuit. The switching conversion circuit transforms high voltage DC into isolated 24VDC low voltage output. Voltage sampling feedback circuit adjusts PWM duty cycle to keep constant output voltage. The monitoring circuit tracks output voltage, current and internal temperature. When protection threshold is triggered, the circuit cuts off output and activates fault alarm. In redundant parallel mode, two power modules share load equally. If one unit fails, the remaining unit bears full load continuously without interruption.
Installation Requirements Cut off rack main power before inserting the power module. Align anti-misalignment notch and insert into vacant SIS rack slot, lock the buckle. Connect AC input wiring to the designated terminal block on front panel. Configure redundant power pair parameters in Safety Manager engineering software. Power on the rack and verify LED status and output voltage reading. Separate AC input cable from low voltage signal cable in wiring duct. Keep sufficient clearance around module for air circulation.
Usage Notes Only identical FC-PSU-UNI2450 series modules can be paired for redundant operation. Do not remove the conformal coating layer on PCB surface. Static protection wrist strap must be worn during module replacement. Do not overload the output beyond rated 450W power limit. Regularly check terminal screw tightness under continuous vibration environment. Do not use this module for non-SIS common DCS rack without Honeywell engineering approval.
