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NDR-480-24 24V 480W 24V Industrial DIN Rail Power Supply
Rp1,150,000.00
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DAPPRA NDR-480-24 (SKU: OF59) is a 480W single output slim industrial DIN rail power supply with 24V DC / 20A output and universal 90–264 VAC input. Built-in active PFC, 92.5% typical efficiency, slim 85.5 mm metal housing, fanless natural convection cooling, complete protection functions, UL508 approved, TS35 DIN rail mounting, 3-year warranty — ideal for high-power industrial control, factory automation and electrical panels.
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Overview
NDR-480-24 Overview
The DAPPRA NDR-480-24 (SKU: OF59) is a 480W single output slim industrial DIN rail power supply designed for higher-power industrial control, factory automation and electromechanical applications. It provides a stable 24V DC output at 20A rated current from a universal 90–264 VAC input or 127–370 VDC input, and includes built-in active PFC for improved power quality.
The unit features an 85.5 mm wide metal housing that enhances power dissipation, fanless natural convection cooling, and complete protection functions including short circuit, overload (constant current limiting with shutdown), over voltage and over temperature protection. Designed for TS35/7.5 or TS35/15 DIN rail mounting and certified to UL508, the NDR-480-24 delivers a high-efficiency 92.5% power solution for demanding industrial loads.
Key Features
NDR-480-24 Key Features
Engineered for high-power, space-saving 24V industrial power supply applications.
- 480W Output · 24V / 20ASingle output configuration providing 24V DC nominal output at 20A rated current (0~20A current range) with 480W rated output power.
- Built-in Active PFCActive power factor correction with PF >0.98 at 115VAC and PF >0.94 at 230VAC under full load, reducing harmonic current and improving power quality.
- Universal AC Input 90–264 VACFull-range single-phase AC input supports global mains voltages. Also supports 127–370 VDC input.
- 24~28V Output AdjustmentFront-panel +V ADJ potentiometer allows the rated output voltage to be adjusted between 24V and 28V to suit the connected load.
- 92.5% Typical EfficiencyThe NDR-480-24 achieves 92.5% typical efficiency, minimizing energy consumption and heat generation inside the control cabinet.
- Slim 85.5 mm Metal HousingThe 85.5 × 125.2 × 128.5 mm metal housing enhances power dissipation and saves DIN rail space inside control cabinets.
- Fanless Natural Convection CoolingNo fan means no dust intake, no acoustic noise and no moving parts — ideal for dusty industrial environments and silent operation.
- Complete Protection FunctionsShort circuit, overload (105–130% rated output power, constant current limiting, shutdown after ~3 s), over voltage (29–33V) and over temperature protection are built in.
- TS35 DIN Rail MountingDesigned for standard TS35/7.5 or TS35/15 DIN rail mounting inside electrical panels, control cabinets and automation equipment.
- UL508 & 3-Year WarrantyCertified to UL508 (industrial control equipment), TUV BS EN/EN62368-1 and EAC TP TC 004, and backed by a 3-year DAPPRA warranty.
Specifications
NDR-480-24 Specifications
Complete technical specifications for the NDR-480-24 industrial DIN rail power supply.
Output
| DC Output Voltage | 24V |
| Rated Current | 20A |
| Current Range | 0~20A |
| Rated Power | 480W |
| Ripple & Noise (max.) | 150mVp-p |
| Voltage Adjustment Range | 24~28V |
| Voltage Tolerance | ±1.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±1.0% |
| Setup, Rise Time | 1500ms, 100ms/230VAC · 3000ms, 100ms/115VAC at full load |
| Hold Up Time (Typ.) | 16ms/230VAC · 16ms/115VAC at full load |
Input
| Voltage Range | 90~264VAC · 127~370VDC |
| Frequency Range | 47~63Hz |
| Power Factor (Typ.) | PF >0.98/115VAC · PF >0.94/230VAC at full load |
| Efficiency (Typ.) | 92.5% |
| AC Current (Typ.) | 4.8A/115VAC · 2.4A/230VAC |
| Inrush Current (Typ.) | 20A/115VAC · 35A/230VAC |
| Leakage Current | <2mA/240VAC |
Protection
| Overload | 105~130% rated output power · Constant current limiting · Shut down after ~3s, re-power on to recover |
| Over Voltage | 29~33V · Shut down output, re-power on to recover |
| Over Temperature | Shut down output; auto-recovery after temperature falls |
| Short Circuit | Protected |
Environment
| Working Temperature | −20 ~ +70°C (Refer to Derating Curve) |
| Working Humidity | 20~95% RH non-condensing |
| Storage Temp., Humidity | −40 ~ +85°C, 10~95% RH |
| Temp. Coefficient | ±0.03%/°C (0~50°C) |
| Vibration | 10~500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes |
Safety & EMC
| Safety Standards | UL508, TUV BS EN/EN62368-1, EAC TP TC 004 |
| Withstand Voltage | I/P-O/P: 3KVAC · I/P-FG: 2KVAC · O/P-FG: 0.5KVAC |
| Isolation Resistance | >100M Ohms / 500VDC / 25°C / 70% RH |
| EMC Emission | BS EN/EN55032 (CISPR32) Class B · BS EN/EN61000-3-2,-3 |
| EMC Immunity | BS EN/EN61000-4-2, 3, 4, 5, 6, 8, 11 · BS EN/EN61000-6-2 (BS EN/EN50082-2) heavy industry level |
Reliability & Dimensions
| MTBF | 1041.6K hrs min. Telcordia SR-332 (Bellcore) · 146.8K hrs min. MIL-HDBK-217F (25°C) |
| Dimensions (W×H×D) | 85.5 × 125.2 × 128.5 mm |
| Weight | 1.5 Kg |
| Packing | 1.5Kg; 8pcs/13Kg/0.9CUFT |
| Warranty | 3 Years |
Front Panel Controls
| +V ADJ | Output voltage adjustment potentiometer (24~28V) |
| DC OK | DC output OK indicator LED |
| Terminal TB1 | Input: FG / AC-N-DC− / AC-L-DC+ |
| Terminal TB2 | Output: +V (pins 1,2) / −V (pins 3,4) |
Notes
1. All parameters not specially mentioned are measured at 230VAC input, rated load and 25°C ambient temperature. 2. Ripple & noise are measured at 20MHz of bandwidth with a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor. 3. Tolerance includes set-up tolerance, line regulation and load regulation. 4. The power supply is considered a component to be installed into a final equipment; the final equipment must be re-confirmed to meet EMC directives. 5. Derating may be needed under low input voltage. 6. The NDR-480-24 includes built-in active PFC. Note that the TB2 output pin order is reversed compared to NDR-75/120/240 models: pins 1,2 = +V and pins 3,4 = −V.
Model Information
NDR-480-24 Model Code
The model number identifies the NDR Series, output wattage and output voltage. DAPPRA SKU for this model: OF59.
Model Code
NDR
-
480
-
24
NDRSeries prefix — DAPPRA NDR Series Slim DIN Rail Power Supply.
480 — Output WattageOutput power rating in Watts. This model provides 480W.
24 — Output VoltageNominal output voltage in VDC. This model provides 24V DC output.
Field
Meaning
Value
NDR
Series prefix
NDR
Output Wattage
Rated output power in Watts
480W
Output Voltage
Nominal DC output voltage
24V
Example: NDR-480-24 = NDR Series, 480W output power, 24V DC output voltage. DAPPRA SKU: OF59.
Dimensions
NDR-480-24 Dimensions
Slim 85.5 mm metal housing with a compact footprint designed for space-constrained control cabinets. All dimensions in mm, tolerance ±1 mm.
Mechanical Dimensions
| Width (W) | 85.5 mm |
| Height (H) | 125.2 mm |
| Depth (D) | 128.5 mm |
| DIN Rail Slot to Top (S) | 35 mm |
| Weight | 1.5 Kg |
| Front Panel | +V ADJ / DC OK |
Installation Clearances
| Top Clearance | 40 mm |
| Bottom Clearance | 20 mm |
| Left / Right Clearance | 5 mm |
| Adjacent Heat Source | 15 mm recommended |
| DIN Rail | TS35/7.5 or TS35/15 |
| Mounting Orientation | Vertical only (input bottom, output top) |
Installation
NDR-480-24 Installation
The NDR-480-24 supports TS35 DIN rail mounting with specific ventilation clearance and orientation requirements for reliable operation.
01 / 06
Vertical Orientation Only
The appropriate mounting orientation is vertical — input terminals at the bottom and output terminals at the top. Upside-down, horizontal or table-top mounting is not allowed, as sufficient cooling will not be possible.
02 / 06
Ventilation Clearance
Always allow good ventilation clearances around the unit: 5 mm left and right, 40 mm above and 20 mm below, to prevent overheating. When the adjacent device is a heat source, keep 15 mm clearance.
03 / 06
TS35 DIN Rail Mounting
Admissible DIN rail: TS35/7.5 or TS35/15. Tilt the unit slightly rearwards, fit over the top hat rail, slide it downward until it hits the stop, press against the bottom for locking, then shake slightly to check the locking action.
04 / 06
FG Must Be Connected to PE
The FG (Frame Ground) terminal must be connected to PE (Protective Earth) for safety and to ensure proper EMC performance.
05 / 06
Operating Temperature Limits
The NDR-480-24 operates from −20°C to +70°C, with full-load operation specified up to approximately 50°C ambient. Load derating is required above this temperature according to the derating curve. Do not install in high ambient temperature locations or near fire sources.
06 / 06
Pollution Degree 2 Environment
Install the unit only in a pollution degree 2 environment — typically dry, well-ventilated locations such as control cabinets. Do not install in places with high moisture or near water.
Wiring & Terminal
NDR-480-24 Wiring & Terminal
The NDR-480-24 uses two terminal blocks: TB1 for input and TB2 for output. Use copper wire only and ensure all strands of each stranded wire enter the terminal connection and the screw terminals are securely fixed to prevent poor contact.
Terminal Pin Assignment
TB1 — Input Terminal
| Pin No. | Assignment |
|---|---|
| 1 | FG (Frame Ground) |
| 2 | AC/N or DC− |
| 3 | AC/L or DC+ |
TB2 — Output Terminal (NDR-480 Only)
| Pin No. | Assignment |
|---|---|
| 1, 2 | DC OUTPUT +V |
| 3, 4 | DC OUTPUT −V |
Note: The NDR-480 TB2 pin order is reversed compared to NDR-75 / 120 / 240. Verify the terminal label before wiring.
The FG pin must be connected to PE (Protective Earth). Both +V pins (1, 2) and both −V pins (3, 4) should be connected to their respective output wires to prevent excessive current stress on a single contact.
Wiring Specification
Recommended Wire
| AWG | Rated Current | Cross-section |
|---|---|---|
| 18 | 7 A | 0.8 mm² |
| 16 | 10 A | 1.3 mm² |
| 14 | 15 A | 2.1 mm² |
| 12 | 20 A | 3.3 mm² |
Current each wire carries should be de-rated to 80% of the current suggested above when using 5 or more wires connected to the unit. Use wires that can withstand temperatures of at least 80°C, such as UL1007.
Terminal Torque Setting
| Model | I/P | O/P |
|---|---|---|
| NDR-480 | 10.35 kgf-cm (9 Lb-in) | 10.35 kgf-cm (9 Lb-in) |
Recommended wire strapping length: 5 mm (0.197"). Recommended screwdriver: 3 mm, slotted type.
Fuse & Circuit Breaker (230V)
| Model | Fuse | C16 | D16 |
|---|---|---|---|
| NDR-480 | T8A/L250V | 3 | 5 |
Maximum number of NDR-480 PSUs that can be connected to a circuit breaker at 230V. For continued protection against risk of fire, replace only with the same type and rating of fuse.
DC Output Voltage Adjustment
The NDR-480-24 includes a front-panel DC output voltage adjustment potentiometer (+V ADJ) and a DC OK indicator LED. The rated output voltage can be adjusted between 24V and 28V via the front-panel adjuster. Output current and output wattage must not exceed the rated value on its specification.
Safety & Compliance
NDR-480-24 Safety & Cautions
Read and follow all safety instructions before installing, wiring, maintaining or modifying the NDR-480-24 power supply.
- Risk of electrical shock and energy hazard. All failure should be examined by a qualified technician. Do not remove the case of the power supply yourself.
- Connecting both the primary and the secondary sides together is not allowed — risk of electric arcs and electric shock (danger to life).
- Risk of burn hazard. Do not touch the unit in operation and shortly after disconnection.
- Risk of fire and short circuit. The openings should be protected from foreign objects or dripping liquids.
- The FG (Frame Ground) must be connected to PE (Protective Earth).
- Output current and output wattage must not exceed the rated value on its specification.
- Before commencing any installation, maintenance or modification work, disconnect the system from supply voltage. Make sure that inadvertent connection in circuit will be impossible.
- For continued protection against risk of fire, replace only with the same type and rating of fuse.
- The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives.
Note: Pollution Degree 2 applies where there is only non-conductive pollution that might temporarily become conductive due to occasional condensation. Generally refers to dry, well-ventilated locations, such as control cabinets.
Applications
NDR-480-24 Industrial Applications
The NDR-480-24 is suitable for higher-power industrial control systems, factory automation equipment, electromechanical apparatus, electrical panels and semiconductor manufacturing equipment.
Industrial Control Systems
Factory Automation
Electromechanical Apparatus
Electrical Panels
Semiconductor Equipment
Machine Control
Process Control
Test & Measurement
Building Automation
PLC & Sensor Power
Industrial LED Lighting
Security & Access Control
Next Step
Need the NDR-480-24 for Your Application?
Contact DAPPRA Automation for product specifications, installation support, technical documentation and purchasing assistance — or explore the full NDR Series and industrial power supply range.
Support
NDR-480-24 FAQ
What is the DAPPRA NDR-480-24 DIN rail power supply?
The DAPPRA NDR-480-24 (SKU: OF59) is a 480W single-output industrial DIN rail power supply designed for industrial control panels, factory automation and electromechanical equipment. It provides 24V DC output at 20A and features built-in active PFC, fanless cooling and multiple protection functions.
What are the output voltage, current and power ratings of the NDR-480-24?
The NDR-480-24 provides a nominal output voltage of 24V DC, a rated output current of 20A and a rated output power of 480W. The output voltage can be adjusted from 24V to 28V using the front-panel voltage adjustment potentiometer.
What is the input voltage range of the NDR-480-24?
The NDR-480-24 supports a single-phase AC input range of 90–264VAC at 47–63Hz. It also supports a DC input range of 127–370VDC.
Does the NDR-480-24 have built-in active PFC?
Yes. The NDR-480-24 features built-in active power factor correction (PFC). Its typical power factor is greater than 0.98 at 115VAC and greater than 0.94 at 230VAC under full load.
What is the efficiency of the NDR-480-24?
The NDR-480-24 achieves a typical efficiency of 92.5%, helping reduce energy consumption and heat generation inside industrial control cabinets.
What protection functions are included in the NDR-480-24?
The NDR-480-24 includes short-circuit, overload, overvoltage and overtemperature protection. Overload protection uses constant-current limiting, with output shutdown after approximately three seconds. Overload and overvoltage shutdown require the power supply to be switched off and powered on again for recovery. Overtemperature protection automatically recovers after the temperature falls.
What is the operating temperature range of the NDR-480-24?
The specified operating temperature range is −20°C to +70°C. Load derating is required above approximately 50°C ambient temperature, according to the product's derating curve.
What are the dimensions and weight of the NDR-480-24?
The NDR-480-24 measures 85.5 × 125.2 × 128.5 mm (W × H × D) and weighs approximately 1.5 kg. Its slim metal housing is designed to save space in industrial control cabinets.
What type of DIN rail is compatible with the NDR-480-24?
The NDR-480-24 supports standard TS35/7.5 and TS35/15 DIN rails, making it suitable for installation in electrical panels, control cabinets and industrial automation equipment.
Does the NDR-480-24 require a cooling fan?
No. The NDR-480-24 uses fanless natural convection cooling. Adequate ventilation clearance must be maintained around the unit to support heat dissipation and reliable operation.
What installation clearances are required for the NDR-480-24?
The recommended clearances are 5mm on the left and right, 40mm above and 20mm below the unit. When an adjacent device is a heat source, a clearance of 15mm is recommended. The power supply must be installed vertically, with input terminals at the bottom and output terminals at the top.
Can the output voltage of the NDR-480-24 be adjusted?
Yes. The front-panel +V ADJ potentiometer allows the output voltage to be adjusted between 24V and 28V DC. The output current and power must not exceed the rated limits of 20A and 480W.
What is the terminal pin assignment of the NDR-480-24?
The terminal assignments are:
TB1 — Input: Pin 1 = FG, Pin 2 = AC/N or DC−, Pin 3 = AC/L or DC+.
TB2 — Output: Pins 1 and 2 = +V; Pins 3 and 4 = −V.
The TB2 output pin order is reversed compared with NDR-75, NDR-120 and NDR-240 models. Always verify the terminal labels before wiring. The FG terminal must be connected to protective earth (PE).
What certifications and EMC standards does the NDR-480-24 comply with?
The NDR-480-24 is certified to UL508, TUV BS EN/EN62368-1 and EAC TP TC 004. It also complies with BS EN/EN61000-6-2 industrial immunity requirements, with additional EMC emission and immunity standards listed in its technical specifications.
What applications are suitable for the NDR-480-24?
The NDR-480-24 is suitable for industrial control systems, factory automation, electrical panels, semiconductor equipment, electromechanical apparatus, machine control, process control, test and measurement equipment, PLC and sensor power circuits, industrial LED lighting, building automation, and security and access control systems.
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Overview
NDR-480-24 Overview
The DAPPRA NDR-480-24 (SKU: OF59) is a 480W single output slim industrial DIN rail power supply designed for higher-power industrial control, factory automation and electromechanical applications. It provides a stable 24V DC output at 20A rated current from a universal 90–264 VAC input or 127–370 VDC input, and includes built-in active PFC for improved power quality.
The unit features an 85.5 mm wide metal housing that enhances power dissipation, fanless natural convection cooling, and complete protection functions including short circuit, overload (constant current limiting with shutdown), over voltage and over temperature protection. Designed for TS35/7.5 or TS35/15 DIN rail mounting and certified to UL508, the NDR-480-24 delivers a high-efficiency 92.5% power solution for demanding industrial loads.
Key Features
NDR-480-24 Key Features
Engineered for high-power, space-saving 24V industrial power supply applications.
- 480W Output · 24V / 20ASingle output configuration providing 24V DC nominal output at 20A rated current (0~20A current range) with 480W rated output power.
- Built-in Active PFCActive power factor correction with PF >0.98 at 115VAC and PF >0.94 at 230VAC under full load, reducing harmonic current and improving power quality.
- Universal AC Input 90–264 VACFull-range single-phase AC input supports global mains voltages. Also supports 127–370 VDC input.
- 24~28V Output AdjustmentFront-panel +V ADJ potentiometer allows the rated output voltage to be adjusted between 24V and 28V to suit the connected load.
- 92.5% Typical EfficiencyThe NDR-480-24 achieves 92.5% typical efficiency, minimizing energy consumption and heat generation inside the control cabinet.
- Slim 85.5 mm Metal HousingThe 85.5 × 125.2 × 128.5 mm metal housing enhances power dissipation and saves DIN rail space inside control cabinets.
- Fanless Natural Convection CoolingNo fan means no dust intake, no acoustic noise and no moving parts — ideal for dusty industrial environments and silent operation.
- Complete Protection FunctionsShort circuit, overload (105–130% rated output power, constant current limiting, shutdown after ~3 s), over voltage (29–33V) and over temperature protection are built in.
- TS35 DIN Rail MountingDesigned for standard TS35/7.5 or TS35/15 DIN rail mounting inside electrical panels, control cabinets and automation equipment.
- UL508 & 3-Year WarrantyCertified to UL508 (industrial control equipment), TUV BS EN/EN62368-1 and EAC TP TC 004, and backed by a 3-year DAPPRA warranty.
Specifications
NDR-480-24 Specifications
Complete technical specifications for the NDR-480-24 industrial DIN rail power supply.
Output
| DC Output Voltage | 24V |
| Rated Current | 20A |
| Current Range | 0~20A |
| Rated Power | 480W |
| Ripple & Noise (max.) | 150mVp-p |
| Voltage Adjustment Range | 24~28V |
| Voltage Tolerance | ±1.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±1.0% |
| Setup, Rise Time | 1500ms, 100ms/230VAC · 3000ms, 100ms/115VAC at full load |
| Hold Up Time (Typ.) | 16ms/230VAC · 16ms/115VAC at full load |
Input
| Voltage Range | 90~264VAC · 127~370VDC |
| Frequency Range | 47~63Hz |
| Power Factor (Typ.) | PF >0.98/115VAC · PF >0.94/230VAC at full load |
| Efficiency (Typ.) | 92.5% |
| AC Current (Typ.) | 4.8A/115VAC · 2.4A/230VAC |
| Inrush Current (Typ.) | 20A/115VAC · 35A/230VAC |
| Leakage Current | <2mA/240VAC |
Protection
| Overload | 105~130% rated output power · Constant current limiting · Shut down after ~3s, re-power on to recover |
| Over Voltage | 29~33V · Shut down output, re-power on to recover |
| Over Temperature | Shut down output; auto-recovery after temperature falls |
| Short Circuit | Protected |
Environment
| Working Temperature | −20 ~ +70°C (Refer to Derating Curve) |
| Working Humidity | 20~95% RH non-condensing |
| Storage Temp., Humidity | −40 ~ +85°C, 10~95% RH |
| Temp. Coefficient | ±0.03%/°C (0~50°C) |
| Vibration | 10~500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes |
Safety & EMC
| Safety Standards | UL508, TUV BS EN/EN62368-1, EAC TP TC 004 |
| Withstand Voltage | I/P-O/P: 3KVAC · I/P-FG: 2KVAC · O/P-FG: 0.5KVAC |
| Isolation Resistance | >100M Ohms / 500VDC / 25°C / 70% RH |
| EMC Emission | BS EN/EN55032 (CISPR32) Class B · BS EN/EN61000-3-2,-3 |
| EMC Immunity | BS EN/EN61000-4-2, 3, 4, 5, 6, 8, 11 · BS EN/EN61000-6-2 (BS EN/EN50082-2) heavy industry level |
Reliability & Dimensions
| MTBF | 1041.6K hrs min. Telcordia SR-332 (Bellcore) · 146.8K hrs min. MIL-HDBK-217F (25°C) |
| Dimensions (W×H×D) | 85.5 × 125.2 × 128.5 mm |
| Weight | 1.5 Kg |
| Packing | 1.5Kg; 8pcs/13Kg/0.9CUFT |
| Warranty | 3 Years |
Front Panel Controls
| +V ADJ | Output voltage adjustment potentiometer (24~28V) |
| DC OK | DC output OK indicator LED |
| Terminal TB1 | Input: FG / AC-N-DC− / AC-L-DC+ |
| Terminal TB2 | Output: +V (pins 1,2) / −V (pins 3,4) |
Notes
1. All parameters not specially mentioned are measured at 230VAC input, rated load and 25°C ambient temperature. 2. Ripple & noise are measured at 20MHz of bandwidth with a 12" twisted pair-wire terminated with a 0.1μF & 47μF parallel capacitor. 3. Tolerance includes set-up tolerance, line regulation and load regulation. 4. The power supply is considered a component to be installed into a final equipment; the final equipment must be re-confirmed to meet EMC directives. 5. Derating may be needed under low input voltage. 6. The NDR-480-24 includes built-in active PFC. Note that the TB2 output pin order is reversed compared to NDR-75/120/240 models: pins 1,2 = +V and pins 3,4 = −V.
Model Information
NDR-480-24 Model Code
The model number identifies the NDR Series, output wattage and output voltage. DAPPRA SKU for this model: OF59.
Model Code
NDR
-
480
-
24
NDRSeries prefix — DAPPRA NDR Series Slim DIN Rail Power Supply.
480 — Output WattageOutput power rating in Watts. This model provides 480W.
24 — Output VoltageNominal output voltage in VDC. This model provides 24V DC output.
Field
Meaning
Value
NDR
Series prefix
NDR
Output Wattage
Rated output power in Watts
480W
Output Voltage
Nominal DC output voltage
24V
Example: NDR-480-24 = NDR Series, 480W output power, 24V DC output voltage. DAPPRA SKU: OF59.
Dimensions
NDR-480-24 Dimensions
Slim 85.5 mm metal housing with a compact footprint designed for space-constrained control cabinets. All dimensions in mm, tolerance ±1 mm.
Mechanical Dimensions
| Width (W) | 85.5 mm |
| Height (H) | 125.2 mm |
| Depth (D) | 128.5 mm |
| DIN Rail Slot to Top (S) | 35 mm |
| Weight | 1.5 Kg |
| Front Panel | +V ADJ / DC OK |
Installation Clearances
| Top Clearance | 40 mm |
| Bottom Clearance | 20 mm |
| Left / Right Clearance | 5 mm |
| Adjacent Heat Source | 15 mm recommended |
| DIN Rail | TS35/7.5 or TS35/15 |
| Mounting Orientation | Vertical only (input bottom, output top) |
Installation
NDR-480-24 Installation
The NDR-480-24 supports TS35 DIN rail mounting with specific ventilation clearance and orientation requirements for reliable operation.
01 / 06
Vertical Orientation Only
The appropriate mounting orientation is vertical — input terminals at the bottom and output terminals at the top. Upside-down, horizontal or table-top mounting is not allowed, as sufficient cooling will not be possible.
02 / 06
Ventilation Clearance
Always allow good ventilation clearances around the unit: 5 mm left and right, 40 mm above and 20 mm below, to prevent overheating. When the adjacent device is a heat source, keep 15 mm clearance.
03 / 06
TS35 DIN Rail Mounting
Admissible DIN rail: TS35/7.5 or TS35/15. Tilt the unit slightly rearwards, fit over the top hat rail, slide it downward until it hits the stop, press against the bottom for locking, then shake slightly to check the locking action.
04 / 06
FG Must Be Connected to PE
The FG (Frame Ground) terminal must be connected to PE (Protective Earth) for safety and to ensure proper EMC performance.
05 / 06
Operating Temperature Limits
The NDR-480-24 operates from −20°C to +70°C, with full-load operation specified up to approximately 50°C ambient. Load derating is required above this temperature according to the derating curve. Do not install in high ambient temperature locations or near fire sources.
06 / 06
Pollution Degree 2 Environment
Install the unit only in a pollution degree 2 environment — typically dry, well-ventilated locations such as control cabinets. Do not install in places with high moisture or near water.
Wiring & Terminal
NDR-480-24 Wiring & Terminal
The NDR-480-24 uses two terminal blocks: TB1 for input and TB2 for output. Use copper wire only and ensure all strands of each stranded wire enter the terminal connection and the screw terminals are securely fixed to prevent poor contact.
Terminal Pin Assignment
TB1 — Input Terminal
| Pin No. | Assignment |
|---|---|
| 1 | FG (Frame Ground) |
| 2 | AC/N or DC− |
| 3 | AC/L or DC+ |
TB2 — Output Terminal (NDR-480 Only)
| Pin No. | Assignment |
|---|---|
| 1, 2 | DC OUTPUT +V |
| 3, 4 | DC OUTPUT −V |
Note: The NDR-480 TB2 pin order is reversed compared to NDR-75 / 120 / 240. Verify the terminal label before wiring.
The FG pin must be connected to PE (Protective Earth). Both +V pins (1, 2) and both −V pins (3, 4) should be connected to their respective output wires to prevent excessive current stress on a single contact.
Wiring Specification
Recommended Wire
| AWG | Rated Current | Cross-section |
|---|---|---|
| 18 | 7 A | 0.8 mm² |
| 16 | 10 A | 1.3 mm² |
| 14 | 15 A | 2.1 mm² |
| 12 | 20 A | 3.3 mm² |
Current each wire carries should be de-rated to 80% of the current suggested above when using 5 or more wires connected to the unit. Use wires that can withstand temperatures of at least 80°C, such as UL1007.
Terminal Torque Setting
| Model | I/P | O/P |
|---|---|---|
| NDR-480 | 10.35 kgf-cm (9 Lb-in) | 10.35 kgf-cm (9 Lb-in) |
Recommended wire strapping length: 5 mm (0.197"). Recommended screwdriver: 3 mm, slotted type.
Fuse & Circuit Breaker (230V)
| Model | Fuse | C16 | D16 |
|---|---|---|---|
| NDR-480 | T8A/L250V | 3 | 5 |
Maximum number of NDR-480 PSUs that can be connected to a circuit breaker at 230V. For continued protection against risk of fire, replace only with the same type and rating of fuse.
DC Output Voltage Adjustment
The NDR-480-24 includes a front-panel DC output voltage adjustment potentiometer (+V ADJ) and a DC OK indicator LED. The rated output voltage can be adjusted between 24V and 28V via the front-panel adjuster. Output current and output wattage must not exceed the rated value on its specification.
Safety & Compliance
NDR-480-24 Safety & Cautions
Read and follow all safety instructions before installing, wiring, maintaining or modifying the NDR-480-24 power supply.
- Risk of electrical shock and energy hazard. All failure should be examined by a qualified technician. Do not remove the case of the power supply yourself.
- Connecting both the primary and the secondary sides together is not allowed — risk of electric arcs and electric shock (danger to life).
- Risk of burn hazard. Do not touch the unit in operation and shortly after disconnection.
- Risk of fire and short circuit. The openings should be protected from foreign objects or dripping liquids.
- The FG (Frame Ground) must be connected to PE (Protective Earth).
- Output current and output wattage must not exceed the rated value on its specification.
- Before commencing any installation, maintenance or modification work, disconnect the system from supply voltage. Make sure that inadvertent connection in circuit will be impossible.
- For continued protection against risk of fire, replace only with the same type and rating of fuse.
- The power supply is considered a component which will be installed into a final equipment. The final equipment must be re-confirmed that it still meets EMC directives.
Note: Pollution Degree 2 applies where there is only non-conductive pollution that might temporarily become conductive due to occasional condensation. Generally refers to dry, well-ventilated locations, such as control cabinets.
Applications
NDR-480-24 Industrial Applications
The NDR-480-24 is suitable for higher-power industrial control systems, factory automation equipment, electromechanical apparatus, electrical panels and semiconductor manufacturing equipment.
Industrial Control Systems
Factory Automation
Electromechanical Apparatus
Electrical Panels
Semiconductor Equipment
Machine Control
Process Control
Test & Measurement
Building Automation
PLC & Sensor Power
Industrial LED Lighting
Security & Access Control
Next Step
Need the NDR-480-24 for Your Application?
Contact DAPPRA Automation for product specifications, installation support, technical documentation and purchasing assistance — or explore the full NDR Series and industrial power supply range.
Support
NDR-480-24 FAQ
What is the DAPPRA NDR-480-24 DIN rail power supply?
The DAPPRA NDR-480-24 (SKU: OF59) is a 480W single-output industrial DIN rail power supply designed for industrial control panels, factory automation and electromechanical equipment. It provides 24V DC output at 20A and features built-in active PFC, fanless cooling and multiple protection functions.
What are the output voltage, current and power ratings of the NDR-480-24?
The NDR-480-24 provides a nominal output voltage of 24V DC, a rated output current of 20A and a rated output power of 480W. The output voltage can be adjusted from 24V to 28V using the front-panel voltage adjustment potentiometer.
What is the input voltage range of the NDR-480-24?
The NDR-480-24 supports a single-phase AC input range of 90–264VAC at 47–63Hz. It also supports a DC input range of 127–370VDC.
Does the NDR-480-24 have built-in active PFC?
Yes. The NDR-480-24 features built-in active power factor correction (PFC). Its typical power factor is greater than 0.98 at 115VAC and greater than 0.94 at 230VAC under full load.
What is the efficiency of the NDR-480-24?
The NDR-480-24 achieves a typical efficiency of 92.5%, helping reduce energy consumption and heat generation inside industrial control cabinets.
What protection functions are included in the NDR-480-24?
The NDR-480-24 includes short-circuit, overload, overvoltage and overtemperature protection. Overload protection uses constant-current limiting, with output shutdown after approximately three seconds. Overload and overvoltage shutdown require the power supply to be switched off and powered on again for recovery. Overtemperature protection automatically recovers after the temperature falls.
What is the operating temperature range of the NDR-480-24?
The specified operating temperature range is −20°C to +70°C. Load derating is required above approximately 50°C ambient temperature, according to the product's derating curve.
What are the dimensions and weight of the NDR-480-24?
The NDR-480-24 measures 85.5 × 125.2 × 128.5 mm (W × H × D) and weighs approximately 1.5 kg. Its slim metal housing is designed to save space in industrial control cabinets.
What type of DIN rail is compatible with the NDR-480-24?
The NDR-480-24 supports standard TS35/7.5 and TS35/15 DIN rails, making it suitable for installation in electrical panels, control cabinets and industrial automation equipment.
Does the NDR-480-24 require a cooling fan?
No. The NDR-480-24 uses fanless natural convection cooling. Adequate ventilation clearance must be maintained around the unit to support heat dissipation and reliable operation.
What installation clearances are required for the NDR-480-24?
The recommended clearances are 5mm on the left and right, 40mm above and 20mm below the unit. When an adjacent device is a heat source, a clearance of 15mm is recommended. The power supply must be installed vertically, with input terminals at the bottom and output terminals at the top.
Can the output voltage of the NDR-480-24 be adjusted?
Yes. The front-panel +V ADJ potentiometer allows the output voltage to be adjusted between 24V and 28V DC. The output current and power must not exceed the rated limits of 20A and 480W.
What is the terminal pin assignment of the NDR-480-24?
The terminal assignments are:
TB1 — Input: Pin 1 = FG, Pin 2 = AC/N or DC−, Pin 3 = AC/L or DC+.
TB2 — Output: Pins 1 and 2 = +V; Pins 3 and 4 = −V.
The TB2 output pin order is reversed compared with NDR-75, NDR-120 and NDR-240 models. Always verify the terminal labels before wiring. The FG terminal must be connected to protective earth (PE).
What certifications and EMC standards does the NDR-480-24 comply with?
The NDR-480-24 is certified to UL508, TUV BS EN/EN62368-1 and EAC TP TC 004. It also complies with BS EN/EN61000-6-2 industrial immunity requirements, with additional EMC emission and immunity standards listed in its technical specifications.
What applications are suitable for the NDR-480-24?
The NDR-480-24 is suitable for industrial control systems, factory automation, electrical panels, semiconductor equipment, electromechanical apparatus, machine control, process control, test and measurement equipment, PLC and sensor power circuits, industrial LED lighting, building automation, and security and access control systems.
5 ulasan untuk NDR-480-24 24V 480W 24V Industrial DIN Rail Power Supply
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Model dan spesifikasi sesuai pesanan. Dudukan DIN rail-nya juga sudah ada, jadi lebih praktis untuk pemasangan.
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Barang terlihat bagus, bodinya kokoh dan terminalnya juga rapi. Sesuai dengan yang saya cari.
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Pengiriman cukup cepat, barang sampai dalam kondisi baik. Tidak ada masalah saat paket diterima.
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Barang sampai dengan aman, packing rapi dan ada plastik pelindungnya juga. Kardus tidak rusak. Terima kasih seller.
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Barang sudah diterima sesuai pesanan. Kondisi masih bagus dan packing aman. Sejauh ini puas belanja di sini.
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Model dan spesifikasi sesuai pesanan. Dudukan DIN rail-nya juga sudah ada, jadi lebih praktis untuk pemasangan.
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Barang terlihat bagus, bodinya kokoh dan terminalnya juga rapi. Sesuai dengan yang saya cari.
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Pengiriman cukup cepat, barang sampai dalam kondisi baik. Tidak ada masalah saat paket diterima.
Rudi******** (pemilik terverifikasi) –
Barang sampai dengan aman, packing rapi dan ada plastik pelindungnya juga. Kardus tidak rusak. Terima kasih seller.
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Barang sudah diterima sesuai pesanan. Kondisi masih bagus dan packing aman. Sejauh ini puas belanja di sini.