Martek PS2494-YE

Working Principle

1. Wide-range AC input filtered by common-mode EMI suppression circuit
2. Active power factor correction stage adjusts input current waveform to minimize harmonic distortion
3. High-frequency switching transformer isolates primary AC and secondary DC circuits
4. Secondary synchronous rectifier converts high-frequency AC to stable 24V DC output
5. Feedback sampling loop adjusts switching duty cycle to maintain constant output voltage under variable load
6. Integrated protection logic triggers hiccup mode under overvoltage, overcurrent or short-circuit fault conditions

Core Technical Performance Parameters

• Input Voltage Range: 100–264 VAC universal single-phase, 50/60Hz
• Power Factor: ≥0.95 full load with active PFC circuit
• Rated Output: 24 VDC, 9.4 A continuous output, total rated power 225.6 W
• Output Ripple & Noise: ≤120 mV peak-to-peak at full rated load
• Hold-Up Time: ≥16 ms under nominal input voltage full load
• Efficiency Rating: 90.2% typical full-load efficiency
• Standby Power Consumption: <0.5 W no-load idle state
• Overvoltage Protection (OVP): 28–30 VDC auto trigger, latch-off output
• Overcurrent Protection (OCP): 110–130% rated current, auto-recovery hiccup mode
• Short-Circuit Protection: Permanent short-circuit withstand, auto-recover after fault removal
• Operating Temperature: -25°C ~ +60°C ambient; derate 3% power per °C above 50°C
• Isolation Voltage: 4000 VAC input to output reinforced isolation
• MTBF Calculated Life: 185,000 hours @ 25°C full load operation

Material & Structural Design

1. Outer Enclosure: 1.2mm cold rolled steel, black matte anti-rust powder coating
2. Internal Heat Dissipation: Aluminum alloy heat sink for power MOSFET and rectifier diodes
3. Cooling Mode: Natural convection passive cooling, no built-in fan (zero fan failure risk)
4. Internal Capacitors: High-temperature 105°C electrolytic main capacitors
5. Terminal Blocks: Screw-type high-current insulated terminals, copper conductive contacts
6. Internal PCB: Double-sided FR4 board with full conformal silicone coating for moisture/dust resistance
7. Mounting Holes: Four corner mounting slots for panel or DIN rail bracket installation

Distinct Function Features

1. Universal global AC input compatible with European, Asian and American factory power grids
2. Active PFC reduces industrial facility harmonic pollution, meets EN 61000-3-2 standard
3. Fanless passive cooling eliminates fan noise and dust clogging failures
4. Reinforced EMC surge protection: DM ±4kV, CM ±6kV lightning surge withstand
5. Wide low-temperature operating range suitable for cold storage, outdoor cabinet equipment
6. Compact low-profile housing saves cabinet internal installation space
7. Parallel current sharing capability for redundant power supply system expansion
8. DC-OK relay signal output for upper system power health monitoring

Typical Application Fields

• PLC, HMI, proximity sensor, photoelectric sensor DC power supply in automation control cabinets
• Low-power solenoid valves, industrial relays, safety light curtain auxiliary power
• Automated warehouse conveyor control modules, small stepper drive power feed
• Outdoor industrial monitoring camera, field bus terminal power supply
• Cold storage food processing equipment, low-temperature workshop control systems

Mandatory Installation Specifications

1. Mount with minimum 20mm clearance on all four sides for natural convection airflow
2. Install vertically with terminal block facing downward to avoid liquid condensation dripping into terminals
3. Input wire cross-section ≥1.5mm² copper; output load wire ≥2.5mm² copper for full current load
4. Keep power supply 15cm away from servo drives, contactors and high-frequency noise sources
5. Ground power supply metal chassis to cabinet protective earth terminal with 2.5mm² ground wire
6. Do not stack multiple power supplies without independent heat dissipation spacing

Operational Attention Items

1. Do not operate continuously above 60°C ambient temperature; forced cooling required for high-temperature environments
2. Avoid installing in direct oil mist, chemical vapor or high-dust unventilated cabinets
3. Verify input AC voltage matches rated range before power energization
4. Do not connect capacitive load exceeding 1000μF directly to output terminals without current-limiting resistor
5. Allow 30-second cooling period after long-term full-load operation before power-off maintenance
6. Regularly inspect terminal screw tightness every 12 months to prevent loose contact overheating