NDR-120-24 120W 24V 5A AC-DC Industrial DIN rail power supply
Rp325,000.00
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DAPPRA NDR-120-24 (SKU: OF55) is a 120W single output slim industrial DIN rail power supply with 24V DC / 5A output and universal 90–264 VAC input. Built-in active PFC, 88% typical efficiency, slim 40 mm metal housing, fanless natural convection cooling, complete protection functions, UL508 approved, TS35 DIN rail mounting, 3-year warranty — ideal for industrial control, factory automation and electrical panels.
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NDR-120-24 Overview
The DAPPRA NDR-120-24 (SKU: OF55) is a 120W single output slim industrial DIN rail power supply designed for industrial control, factory automation and electromechanical applications. It provides a stable 24V DC output at 5A 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 a 40 mm wide metal housing, fanless natural convection cooling, and complete protection functions including short circuit, overload (constant current limiting), over voltage and over temperature protection. Designed for TS35/7.5 or TS35/15 DIN rail mounting and certified to UL508, the NDR-120-24 delivers reliable 24V power with 88% typical efficiency for demanding industrial loads.
NDR-120-24 Key Features
Engineered for efficient, space-saving 24V industrial power supply applications.
- 120W Output · 24V / 5ASingle output configuration providing 24V DC nominal output at 5A rated current (0~5A current range) with 120W rated output power.
- Built-in Active PFCActive power factor correction with PF >0.93, 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.
- 88% Typical EfficiencyThe NDR-120-24 achieves 88% typical efficiency, balancing performance with low power dissipation.
- Slim 40 mm Metal HousingThe 40 × 125.2 × 113.5 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 (105–160% rated output power, constant current limiting, auto-recovery), 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), and backed by a 3-year DAPPRA warranty.
NDR-120-24 Specifications
Complete technical specifications for the NDR-120-24 industrial DIN rail power supply.
Output
| DC Output Voltage | 24V |
| Rated Current | 5A |
| Current Range | 0~5A |
| Rated Power | 120W |
| Ripple & Noise (max.) | 120mVp-p |
| Voltage Adjustment Range | 24~28V |
| Voltage Tolerance | ±1.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±1.0% |
| Setup, Rise Time | 1200ms, 60ms/230VAC · 2500ms, 60ms/115VAC at full load |
| Hold Up Time (Typ.) | 16ms/230VAC · 10ms/115VAC at full load |
Input
| Voltage Range | 90~264VAC · 127~370VDC |
| Frequency Range | 47~63Hz |
| Power Factor (Typ.) | PF >0.93 |
| Efficiency (Typ.) | 88% |
| AC Current (Typ.) | 2.25A/115VAC · 1.3A/230VAC |
| Inrush Current (Typ.) | 20A/115VAC · 35A/230VAC |
| Leakage Current | <1mA/240VAC |
Protection
| Overload | 105~160% rated output power · Constant current limiting · Auto-recovery |
| Over Voltage | 29~33V · Shut down output, re-power on to recover |
| Over Temperature | Shut down output; re-power on to recover |
| Short Circuit | Protected |
Environment
| Working Temperature | −20 ~ +70°C (Full load up to 45°C, derating above) |
| Working Humidity | 20~95% RH non-condensing |
| Storage Temp., Humidity | −40 ~ +85°C, 10~95% RH |
| Temp. Coefficient | ±0.03%/°C (0~45°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 A · 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 | 453,334 hrs min. MIL-HDBK-217F (25°C) |
| Dimensions (W×H×D) | 40 × 125.2 × 113.5 mm |
| Weight | 0.6 Kg |
| Packing | 0.6Kg; 20pcs/13Kg/0.9CUF |
| 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) |
NDR-120-24 Model Code
The model number identifies the NDR Series, output wattage and output voltage. DAPPRA SKU for this model: OF55.
NDR-120-24 Dimensions
Slim 40 mm metal housing with a compact footprint designed for space-constrained control cabinets. All dimensions in mm, tolerance ±1 mm.
| Width (W) | 40 mm |
| Height (H) | 125.2 mm |
| Depth (D) | 113.5 mm |
| DIN Rail Slot to Top (S) | 35 mm |
| Weight | 0.6 Kg |
| Front Panel | +V ADJ / DC OK |
| 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) |
NDR-120-24 Installation
The NDR-120-24 supports TS35 DIN rail mounting with specific ventilation clearance and orientation requirements for reliable operation.
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.
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.
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.
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.
Operating Temperature Limits
The NDR-120-24 operates from −20°C to +70°C, with full-load operation specified up to 45°C ambient. Load derating is required above 45°C according to the derating curve. Do not install in high ambient temperature locations or near fire sources.
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.
NDR-120-24 Wiring & Terminal
The NDR-120-24 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
| Pin No. | Assignment |
|---|---|
| 1 | FG (Frame Ground) |
| 2 | AC/N or DC− |
| 3 | AC/L or DC+ |
| Pin No. | Assignment |
|---|---|
| 1, 2 | DC OUTPUT −V |
| 3, 4 | DC OUTPUT +V |
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. DC input operation is possible by connecting AC/L(+), AC/N(−).
Wiring Specification
| 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.
| Model | I/P | O/P |
|---|---|---|
| NDR-120 | 7.5 kgf-cm (6.5 Lb-in) | 7.5 kgf-cm (6.5 Lb-in) |
Recommended wire strapping length: 5 mm (0.197"). Recommended screwdriver: 3 mm, slotted type.
| Model | Fuse | C16 | D16 |
|---|---|---|---|
| NDR-120 | T4A/L250V | 5 | 10 |
Maximum number of NDR-120 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.
NDR-120-24 Safety & Cautions
Read and follow all safety instructions before installing, wiring, maintaining or modifying the NDR-120-24 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.
NDR-120-24 Industrial Applications
The NDR-120-24 is suitable for industrial control systems, factory automation equipment, electromechanical apparatus, electrical panels and semiconductor manufacturing equipment.
Need the NDR-120-24 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.
NDR-120-24 FAQ
What is the DAPPRA NDR-120-24 used for?
The DAPPRA NDR-120-24 (SKU: OF55) is a 120W industrial DIN rail power supply that provides 24V DC at a rated current of 5A. It is designed for compatible industrial control panels, factory automation equipment, and electromechanical systems that require a 24V DC power source.
Can the NDR-120-24 supply 5A continuously?
Its rated output current is 5A at 24V DC, equivalent to 120W. Continuous full-load operation is specified up to 45°C ambient. Above 45°C, load derating is required according to the derating curve. Actual capability depends on ambient temperature, ventilation, and installation conditions.
Can I use the NDR-120-24 to power a PLC and several sensors?
It may be suitable if the PLC and sensors require 24V DC and their combined current consumption remains within the supply's 5A rating. Include startup demand and other connected loads when calculating the required capacity.
How does the NDR-120-24 differ from the NDR-120-12?
The NDR-120-24 provides 24V DC at 5A, while the NDR-120-12 provides 12V DC at 10A. Both are rated at 120W. Choose the model based on the voltage required by your equipment; the two output voltages are not interchangeable.
What is the input voltage range of the NDR-120-24?
The NDR-120-24 supports a universal single-phase AC input range of 90–264VAC at 47–63Hz and a DC input range of 127–370VDC. Follow the correct input terminal connections and verify the model datasheet before installation.
Can the output voltage of the NDR-120-24 be adjusted?
Yes. The front-panel +V ADJ potentiometer allows the output voltage to be adjusted from 24V to 28V DC. The output current and power must not exceed the rated limits of 5A and 120W.
What is the typical efficiency of the NDR-120-24?
The NDR-120-24 has a typical efficiency of 88%. Actual efficiency varies with input voltage and load conditions.
Does the NDR-120-24 have built-in active PFC?
Yes. The NDR-120-24 includes built-in active power factor correction (PFC) with a typical power factor greater than 0.93, helping to reduce harmonic current and improve power quality. Note that within the NDR Series, the 240W and 480W models also feature active PFC, but the NDR-120-24 itself does include this function.
What protection functions are available on the NDR-120-24?
The NDR-120-24 includes short-circuit, overload, overvoltage, and overtemperature protection. Overload protection is rated at 105–160% of rated output power and uses constant-current limiting with automatic recovery after the fault is removed. Overvoltage protection is set at 29–33V and requires re-powering to recover.
Is the NDR-120-24 suitable for a compact control cabinet?
The NDR-120-24 has a 40 mm housing width. This can help with DIN rail layout in compact cabinets, but you should also account for the full unit dimensions (40 × 125.2 × 113.5 mm), wiring space, terminal access, and cooling clearance.
Does the NDR-120-24 require a cooling fan?
No. The NDR Series uses fanless natural convection cooling. Allow sufficient airflow around the power supply and follow the installation instructions for mounting orientation and clearance.
Which DIN rails are compatible with the NDR-120-24?
The NDR-120-24 supports standard TS35/7.5 and TS35/15 DIN rail mounting. Check the model's installation drawing and mounting instructions to ensure that the rail and cabinet arrangement are suitable.
Can I replace an existing 24V power supply with the NDR-120-24?
It may be suitable if the existing supply's input range, 24V output, 5A current capacity, power rating, dimensions, and terminal connections match your requirements. Check the existing unit's nameplate and load requirements before replacement.
What should I check when wiring the NDR-120-24?
Confirm the input and output terminal markings, input voltage, output polarity, wire size, and load current before connecting the unit. The protective earth connection must follow the product's wiring instructions. Disconnect the input supply before installation or maintenance.
How can I confirm compatibility and request a quotation for the NDR-120-24?
Provide the required quantity, input supply, connected equipment details, expected load, and delivery destination. DAPPRA can help confirm model suitability, current availability, pricing, lead time, technical documentation, and warranty terms.
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NDR-120-24 Overview
The DAPPRA NDR-120-24 (SKU: OF55) is a 120W single output slim industrial DIN rail power supply designed for industrial control, factory automation and electromechanical applications. It provides a stable 24V DC output at 5A 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 a 40 mm wide metal housing, fanless natural convection cooling, and complete protection functions including short circuit, overload (constant current limiting), over voltage and over temperature protection. Designed for TS35/7.5 or TS35/15 DIN rail mounting and certified to UL508, the NDR-120-24 delivers reliable 24V power with 88% typical efficiency for demanding industrial loads.
NDR-120-24 Key Features
Engineered for efficient, space-saving 24V industrial power supply applications.
- 120W Output · 24V / 5ASingle output configuration providing 24V DC nominal output at 5A rated current (0~5A current range) with 120W rated output power.
- Built-in Active PFCActive power factor correction with PF >0.93, 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.
- 88% Typical EfficiencyThe NDR-120-24 achieves 88% typical efficiency, balancing performance with low power dissipation.
- Slim 40 mm Metal HousingThe 40 × 125.2 × 113.5 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 (105–160% rated output power, constant current limiting, auto-recovery), 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), and backed by a 3-year DAPPRA warranty.
NDR-120-24 Specifications
Complete technical specifications for the NDR-120-24 industrial DIN rail power supply.
Output
| DC Output Voltage | 24V |
| Rated Current | 5A |
| Current Range | 0~5A |
| Rated Power | 120W |
| Ripple & Noise (max.) | 120mVp-p |
| Voltage Adjustment Range | 24~28V |
| Voltage Tolerance | ±1.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±1.0% |
| Setup, Rise Time | 1200ms, 60ms/230VAC · 2500ms, 60ms/115VAC at full load |
| Hold Up Time (Typ.) | 16ms/230VAC · 10ms/115VAC at full load |
Input
| Voltage Range | 90~264VAC · 127~370VDC |
| Frequency Range | 47~63Hz |
| Power Factor (Typ.) | PF >0.93 |
| Efficiency (Typ.) | 88% |
| AC Current (Typ.) | 2.25A/115VAC · 1.3A/230VAC |
| Inrush Current (Typ.) | 20A/115VAC · 35A/230VAC |
| Leakage Current | <1mA/240VAC |
Protection
| Overload | 105~160% rated output power · Constant current limiting · Auto-recovery |
| Over Voltage | 29~33V · Shut down output, re-power on to recover |
| Over Temperature | Shut down output; re-power on to recover |
| Short Circuit | Protected |
Environment
| Working Temperature | −20 ~ +70°C (Full load up to 45°C, derating above) |
| Working Humidity | 20~95% RH non-condensing |
| Storage Temp., Humidity | −40 ~ +85°C, 10~95% RH |
| Temp. Coefficient | ±0.03%/°C (0~45°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 A · 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 | 453,334 hrs min. MIL-HDBK-217F (25°C) |
| Dimensions (W×H×D) | 40 × 125.2 × 113.5 mm |
| Weight | 0.6 Kg |
| Packing | 0.6Kg; 20pcs/13Kg/0.9CUF |
| 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) |
NDR-120-24 Model Code
The model number identifies the NDR Series, output wattage and output voltage. DAPPRA SKU for this model: OF55.
NDR-120-24 Dimensions
Slim 40 mm metal housing with a compact footprint designed for space-constrained control cabinets. All dimensions in mm, tolerance ±1 mm.
| Width (W) | 40 mm |
| Height (H) | 125.2 mm |
| Depth (D) | 113.5 mm |
| DIN Rail Slot to Top (S) | 35 mm |
| Weight | 0.6 Kg |
| Front Panel | +V ADJ / DC OK |
| 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) |
NDR-120-24 Installation
The NDR-120-24 supports TS35 DIN rail mounting with specific ventilation clearance and orientation requirements for reliable operation.
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.
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.
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.
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.
Operating Temperature Limits
The NDR-120-24 operates from −20°C to +70°C, with full-load operation specified up to 45°C ambient. Load derating is required above 45°C according to the derating curve. Do not install in high ambient temperature locations or near fire sources.
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.
NDR-120-24 Wiring & Terminal
The NDR-120-24 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
| Pin No. | Assignment |
|---|---|
| 1 | FG (Frame Ground) |
| 2 | AC/N or DC− |
| 3 | AC/L or DC+ |
| Pin No. | Assignment |
|---|---|
| 1, 2 | DC OUTPUT −V |
| 3, 4 | DC OUTPUT +V |
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. DC input operation is possible by connecting AC/L(+), AC/N(−).
Wiring Specification
| 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.
| Model | I/P | O/P |
|---|---|---|
| NDR-120 | 7.5 kgf-cm (6.5 Lb-in) | 7.5 kgf-cm (6.5 Lb-in) |
Recommended wire strapping length: 5 mm (0.197"). Recommended screwdriver: 3 mm, slotted type.
| Model | Fuse | C16 | D16 |
|---|---|---|---|
| NDR-120 | T4A/L250V | 5 | 10 |
Maximum number of NDR-120 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.
NDR-120-24 Safety & Cautions
Read and follow all safety instructions before installing, wiring, maintaining or modifying the NDR-120-24 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.
NDR-120-24 Industrial Applications
The NDR-120-24 is suitable for industrial control systems, factory automation equipment, electromechanical apparatus, electrical panels and semiconductor manufacturing equipment.
Need the NDR-120-24 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.
NDR-120-24 FAQ
What is the DAPPRA NDR-120-24 used for?
The DAPPRA NDR-120-24 (SKU: OF55) is a 120W industrial DIN rail power supply that provides 24V DC at a rated current of 5A. It is designed for compatible industrial control panels, factory automation equipment, and electromechanical systems that require a 24V DC power source.
Can the NDR-120-24 supply 5A continuously?
Its rated output current is 5A at 24V DC, equivalent to 120W. Continuous full-load operation is specified up to 45°C ambient. Above 45°C, load derating is required according to the derating curve. Actual capability depends on ambient temperature, ventilation, and installation conditions.
Can I use the NDR-120-24 to power a PLC and several sensors?
It may be suitable if the PLC and sensors require 24V DC and their combined current consumption remains within the supply's 5A rating. Include startup demand and other connected loads when calculating the required capacity.
How does the NDR-120-24 differ from the NDR-120-12?
The NDR-120-24 provides 24V DC at 5A, while the NDR-120-12 provides 12V DC at 10A. Both are rated at 120W. Choose the model based on the voltage required by your equipment; the two output voltages are not interchangeable.
What is the input voltage range of the NDR-120-24?
The NDR-120-24 supports a universal single-phase AC input range of 90–264VAC at 47–63Hz and a DC input range of 127–370VDC. Follow the correct input terminal connections and verify the model datasheet before installation.
Can the output voltage of the NDR-120-24 be adjusted?
Yes. The front-panel +V ADJ potentiometer allows the output voltage to be adjusted from 24V to 28V DC. The output current and power must not exceed the rated limits of 5A and 120W.
What is the typical efficiency of the NDR-120-24?
The NDR-120-24 has a typical efficiency of 88%. Actual efficiency varies with input voltage and load conditions.
Does the NDR-120-24 have built-in active PFC?
Yes. The NDR-120-24 includes built-in active power factor correction (PFC) with a typical power factor greater than 0.93, helping to reduce harmonic current and improve power quality. Note that within the NDR Series, the 240W and 480W models also feature active PFC, but the NDR-120-24 itself does include this function.
What protection functions are available on the NDR-120-24?
The NDR-120-24 includes short-circuit, overload, overvoltage, and overtemperature protection. Overload protection is rated at 105–160% of rated output power and uses constant-current limiting with automatic recovery after the fault is removed. Overvoltage protection is set at 29–33V and requires re-powering to recover.
Is the NDR-120-24 suitable for a compact control cabinet?
The NDR-120-24 has a 40 mm housing width. This can help with DIN rail layout in compact cabinets, but you should also account for the full unit dimensions (40 × 125.2 × 113.5 mm), wiring space, terminal access, and cooling clearance.
Does the NDR-120-24 require a cooling fan?
No. The NDR Series uses fanless natural convection cooling. Allow sufficient airflow around the power supply and follow the installation instructions for mounting orientation and clearance.
Which DIN rails are compatible with the NDR-120-24?
The NDR-120-24 supports standard TS35/7.5 and TS35/15 DIN rail mounting. Check the model's installation drawing and mounting instructions to ensure that the rail and cabinet arrangement are suitable.
Can I replace an existing 24V power supply with the NDR-120-24?
It may be suitable if the existing supply's input range, 24V output, 5A current capacity, power rating, dimensions, and terminal connections match your requirements. Check the existing unit's nameplate and load requirements before replacement.
What should I check when wiring the NDR-120-24?
Confirm the input and output terminal markings, input voltage, output polarity, wire size, and load current before connecting the unit. The protective earth connection must follow the product's wiring instructions. Disconnect the input supply before installation or maintenance.
How can I confirm compatibility and request a quotation for the NDR-120-24?
Provide the required quantity, input supply, connected equipment details, expected load, and delivery destination. DAPPRA can help confirm model suitability, current availability, pricing, lead time, technical documentation, and warranty terms.
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