Description
Emerson 12P4375X012
Technical Specifications
- AC input voltage range: 100VAC to 240VAC universal input
- Input frequency: 50Hz / 60Hz auto-adaptive
- DC output: 24VDC regulated
- Rated continuous output current: 8A
- Operating temperature: 0°C to 60°C under full load
- Storage temperature: -40°C to 85°C
- Ambient humidity: 5% to 95% non-condensing
Functional Features Supports redundant parallel load-sharing operation. Hot swap design enables online replacement without cutting power of the entire rack. Integrated protection functions include overvoltage protection, undervoltage lockout, overcurrent limiting, short-circuit shutdown and overtemperature protection. Onboard monitoring circuit collects voltage, current and temperature data and uploads diagnostic information to DeltaV system. Front panel tri-color LED shows power normal status, running status and fault alarm status. Internal EMI filter suppresses power surge and high frequency noise from power grid.
Application Scenarios Installed inside DeltaV main control cabinets, remote I/O cabinets and safety instrumented system auxiliary power cabinets. Widely adopted in petrochemical, pharmaceutical, thermal power and water treatment industries for DeltaV DCS power supply.
Performance Parameters
- Power conversion efficiency reaches 89%
- Output voltage fluctuation controlled within ±1% from no load to full load
- Microsecond-level protection response upon short-circuit and overload
- Bumpless redundant switchover with zero voltage drop
- Low output ripple for sensitive control hardware
Material Composition Aluminum alloy shell with integrated passive heat dissipation structure and anti-corrosion surface treatment. Internal PCB is industrial flame-retardant substrate. Core power components include power switching semiconductors, high-temperature capacitors and precision voltage regulation chips. Terminals adopt thick copper plating. Structural plastic components comply with high-temperature flame-retardant industrial standards.
Structural Characteristics Vertical plug-in rack structure compatible with DeltaV cabinet backplane. Compact layout reduces cabinet space occupation. AC input and DC output terminal block located on upper section. Passive heat sink and air duct realize fanless heat dissipation. Front panel equipped with LED indicators and locking buckle to avoid vibration-induced poor contact. Power circuit and monitoring circuit are physically separated to reduce electromagnetic crosstalk.
Working Principle External AC power enters rectifier circuit and converts to raw DC power. Multi-stage EMI filtering and voltage regulation produce stable 24VDC output supplied to cabinet backplane. In redundant parallel setup, two power modules share load evenly. If one module fails or overheats, the remaining working module instantly undertakes 100% of rack load without power interruption. Onboard monitoring chips continuously sample output voltage, operating current and internal temperature. Protection circuit triggers and sends fault alarm when parameters cross threshold values.
Installation Requirements Install vertically in dedicated DeltaV cabinet. Tilted, horizontal or inverted mounting is forbidden. Reserve sufficient upper and lower ventilation clearance. Cables and modules cannot block cooling air passages. Power wiring follows industrial electrical specifications. Protective earth wire must be securely connected to cabinet grounding bus bar. Lock module buckle after insertion. Do not install in environment with heavy vibration, corrosive gas, conductive dust or condensation.
Use Precautions Disconnect corresponding AC power before wiring, disassembly or maintenance work. Do not operate beyond rated voltage and current limits. Periodically remove dust accumulated on shell and heat dissipation air ducts. Do not open sealed module shell. Replace faulty module immediately when fault LED lights up to maintain redundant reliability. Avoid frequent power cycling.
