Technical Specifications & Core Performance Parameters (Bold Key Data)

• Input Voltage Range: DC 200V ~ 480V (DC bus power tap from servo drive internal circuit)
• Fixed Output Voltage: 12VDC ±1% full load voltage stability
• Rated Continuous Output Current: 4.0A
• Maximum Peak Output Current: 4.74A (model core parameter code 0474N), sustain 30-second transient overload
• Rated Output Power: 48W continuous rated power
• Isolation Grade: Input-output 2500VAC reinforced isolation insulation
• Output Ripple Noise: ≤2mV peak-to-peak under full rated load
• Voltage Regulation Rate: ≤0.05% full input voltage range load variation
• Overload Protection Threshold: 4.74A automatic constant current current-limiting protection, non-latching self-recovery after load reduction
• Short-Circuit Protection: Output short-circuit automatic power cutoff, auto-restart after short-circuit fault elimination
• Physical Dimension: W 42mm × H 120mm × D 78mm
• Net Weight: 0.38kg
• Protection Class: IP30 sealed plastic housing, dust-proof for cabinet internal installation
• Operating Temperature Range: 0°C ~ +50°C full rated output; derate 4%/°C above 50°C
• Storage Temperature Range: -30°C ~ +70°C
• Allowable Relative Humidity: ≤90% RH, non-condensing operating environment
• Certifications: UL60950, CE LVD industrial power safety certification

Material Composition

1. Outer Housing: Flame-retardant V0 grade ABS sealed plastic enclosure with integrated ventilation slit
2. Internal Transformer: High-permeability ferrite core isolated switching transformer, copper foil shielding layer to suppress electromagnetic noise
3. Switching Power Chip: Industrial grade high-frequency PWM isolated control IC
4. Rectifier Components: Low forward voltage Schottky power diodes for secondary side rectification
5. Filter Capacitors: Low ESR aluminum electrolytic high-frequency filter capacitors
6. Internal Circuit Substrate: FR-4 thin fiberglass PCB with full surface tin plating anti-oxidation treatment

Structural Features

1. Compact rectangular sealed modular design, compatible with internal servo drive PCB fixed mounting hole spacing and external DIN rail small auxiliary power installation
2. Front panel two groups of terminal blocks: DC bus input terminals, 12VDC output power terminals with positive/negative polarity clear marking
3. Single red LED power status indicator on front panel, lit steady for normal output, flashing for overload/short-circuit fault state
4. Internal full-surround copper foil shielding layer eliminates switching power high-frequency noise interference to servo feedback signal circuits
5. Passive natural convection heat dissipation structure without built-in cooling fan, zero mechanical wear failure risk
6. Standard four-corner mounting through holes for screw fixation on PCB or cabinet mounting brackets

Working Principle

1. High-voltage DC bus input from servo drive internal circuit enters primary side of isolated switching transformer via input filter circuit
2. High-frequency PWM control IC executes high-speed switching modulation of primary winding current, transmits energy to secondary winding via ferrite isolation transformer
3. Secondary side Schottky diode rectification and multi-stage LC filter circuit convert high-frequency alternating current to stable 12VDC direct current output
4. Built-in real-time output current sampling circuit monitors load current; when current exceeds 4.74A threshold, trigger constant current limiting overload protection without complete power cutoff
5. Output short-circuit fault detection circuit immediately stops PWM switching signal output upon output terminal short-circuit condition, automatically recover normal operation after short-circuit removed
6. Copper foil shielding layer suppresses high-frequency switching electromagnetic radiation noise to avoid interference with servo encoder low-amplitude feedback signals

Function Characteristics

1. Reinforced input-output isolation eliminates ground loop interference between servo high-voltage DC bus and external low-voltage sensors
2. Ultra-low output ripple noise ensures stable power supply for high-precision encoder and analog signal sensors without signal distortion
3. Automatic current-limiting overload protection and self-recovery short-circuit protection eliminate external fuse accessory requirement
4. Wide DC input voltage range compatible with all S400/S600/S700 series servo drive internal DC bus voltage specifications
5. Passive heat dissipation structure zero maintenance, no cooling fan dust accumulation failure risk for long-term continuous operation
6. Dual installation mode support: Internal servo drive PCB screw mounting, external DIN rail auxiliary power fixed installation

Advantage Highlights

1. Kollmorgen original matching power module, electrical parameters fully matched with brand servo drives without compatibility matching testing
2. Built-in multi-layer noise suppression shielding design, eliminate servo system low-speed jitter caused by switching power electromagnetic interference
3. Reinforced 2500VAC isolation insulation meets industrial safety standards, prevent high-voltage DC bus leakage damage to external low-voltage sensors
4. Compact small volume occupies minimal cabinet internal space, replace bulky external independent 12V power supply modules
5. Self-recovery overload/short-circuit protection reduces field equipment fault shutdown frequency caused by temporary sensor wiring short-circuit
6. Wide temperature operating range compatible with high-temperature cabinet environment of heavy industrial automation equipment

Applicable Industries

Installation Requirements

1. Two installation modes available: 1) Internal servo drive PCB four-corner screw fixed mounting, align with drive PCB reserved mounting holes; 2) External cabinet small bracket screw fixed installation, maintain 30mm surrounding ventilation clearance for natural convection cooling
2. DC bus input wiring cross-section ≥0.75mm² copper wire; 12VDC output power wire cross-section ≥1.0mm² copper conductor for full 4A rated load operation
3. Output power cable shield layer single-end grounded at power module output terminal side to eliminate ground loop noise
4. Installation position must maintain minimum 5cm separation distance from servo drive power IGBT heat sink to avoid high-temperature radiation impact
5. Enclosure ventilation slits unobstructed, no cable or mechanical components block heat dissipation air circulation channel
6. Forbid installation under direct water vapor or oil mist environment; sealed housing cannot withstand long-term liquid mist infiltration

Usage Precautions

1. Strictly observe positive/negative polarity marking on terminal blocks during wiring; reverse polarity input causes permanent internal circuit breakdown
2. Do not exceed 4.0A continuous output load current; long-term overload operation accelerates internal electrolytic capacitor aging and reduces service life
3. Avoid output terminal short-circuit continuous state exceeding 30 seconds; repeated long-duration short-circuit damages internal switching transformer winding insulation
4. Conduct semi-annual visual inspection of ventilation slits dust accumulation; dust blockage reduces heat dissipation efficiency and triggers over-temperature load derating
5. Disconnect servo drive main power supply before disassembling VF-DC0474N-12-0 wiring terminals to cut off DC bus input power completely
6. Do not stack multiple power modules together without separation brackets; overlapping blocks natural convection heat dissipation channel