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S-50-24 50W 24V DC AC-DC Single Output Enclosed Switching Power Supply
Rp150,000.00
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DAPPRA S-50-24 (SKU: SY06) is a 50.4W single output conventional enclosed switching power supply with 24V DC / 2.1A output. Selectable 85–132 VAC / 170–264 VAC input by switch, 82% typical efficiency, enclosed metal chassis, fanless natural convection cooling, 159 × 97 × 38 mm — ideal for general industrial and commercial applications.
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Overview
S-50-24 (SY06) Overview
The DAPPRA S-50-24 (internal code SY06) is a 50.4W single-output enclosed switching power supply delivering 24V DC at 2.1A. It belongs to the S Series conventional enclosed platform, which uses a metal chassis with perforated ventilation and selectable AC input by switch — a cost-effective solution for general industrial and commercial loads that require a single fixed 24V rail.
The S-50-24 uses selectable AC input: 85–132VAC or 170–264VAC via an external selector switch, or 240–370VDC. Efficiency is 82% typical. Free air convection cooling is used without a fan, so the unit operates quietly and requires no fan maintenance. The output voltage can be trimmed from 22.6V to 26.4V via the front-panel +V ADJ potentiometer.
The enclosed metal chassis measures 159 × 97 × 38 mm and weighs approximately 0.51 kg. Protection includes short circuit and overload protection (105–150% fold-back current limiting, auto-recovery). The S-50-24 is suited to 24V relay banks, sensor circuits, small solenoid loads and general 24V industrial control applications where 2.1A is sufficient.
Key Features
S-50-24 Key Features
A 50W 24V enclosed power supply with selectable AC input and fanless cooling.
- 50.4W Output · 24V / 2.1A24V DC at 2.1A (0–2.1A), 50.4W. +V ADJ range 22.6–26.4V.
- Selectable AC Input by Switch85–132VAC / 170–264VAC selected by external switch, or 240–370VDC.
- 82% Typical EfficiencyBalanced efficiency for a conventional 50W enclosed chassis.
- Free Air Convection CoolingNo fan — quiet operation, no dust intake through a fan, no fan maintenance.
- Enclosed Metal Chassis with Vents159 × 97 × 38 mm chassis with perforated ventilation for heat dissipation.
- Overload Protection 105–150%Fold-back current limiting, auto-recovery after fault removal.
- Short Circuit ProtectionProtected output with auto-recovery.
- LED Power-On IndicatorFront-panel LED for quick visual status check.
- -10°C to +60°C Operating RangeWith derating above +50°C.
- Compact 0.51 kg Enclosed UnitSuitable for standalone mounting inside control cabinets and equipment.
Specifications
S-50-24 (SY06) Specifications
Output
| Model | S-50-24 (SY06) |
| DC Voltage | 24V |
| Rated Current | 2.1A |
| Current Range | 0–2.1A |
| Rated Power | 50.4W |
| Voltage Adjustment | 22.6–26.4V |
| Voltage Tolerance | ±1.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±0.5% |
| Ripple & Noise (max.) | 100mVp-p |
| Setup / Rise / Hold-up | 200ms / 100ms / 20ms at full load |
Protection
| Overload | 105–150% rated output, fold-back current limiting, auto-recovery |
| Short Circuit | Protected, auto-recovery |
Input
| Voltage | 85–132VAC / 170–264VAC (selectable by switch) · 240–370VDC |
| Frequency | 47–63Hz |
| AC Current (typ.) | 1.3A @ 115VAC · 0.65A @ 230VAC |
| Inrush Current (max.) | 18A @ 115VAC · 36A @ 230VAC (cold start) |
| Leakage Current | <1mA @ 240VAC |
| Efficiency (typ.) | 82% |
Switching Frequency
| Fixed Switching Frequency | 27 kHz |
Environment
| Working Temperature | -10 ~ +60°C (derating above +50°C) |
| Storage Temperature | -20 ~ +85°C |
| Working Humidity | 20–90% RH non-condensing |
| Temperature Coefficient | 0.03%/°C (0 ~ 50°C) |
| Vibration | 10–500Hz, 2G, 10min/cycle, 60min each axis |
Safety & EMC
| Safety Standards | Design refer to UL1012 |
| Withstand Voltage | I/P–O/P: 1.5kVAC · I/P–FG: 1.5kVAC · O/P–FG: 0.5kVAC |
| Isolation Resistance | 100MΩ / 500VDC |
| EMC Emission | Design refer to FCC Part15 J Conduction Class B |
Mechanical
| Dimensions (L×W×H) | 159 × 97 × 38 mm |
| Weight | Approx. 0.51 kg |
| Housing | Enclosed metal chassis with vents |
| Cooling | Free air convection (fanless) |
| Warranty | 1 Year |
Terminal Assignment
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | FG (must connect to PE) |
| 4 | DC OUTPUT −V |
| 5 | DC OUTPUT +V |
Notes
24V / 2.1A / 50.4W. Selectable AC input by switch — verify the switch position before applying power. 5-pin terminal: AC/L, AC/N, FG, −V, +V. Fanless, 159 × 97 × 38 mm. Derating above +50°C. 1-year warranty.
Dimensions
S-50-24 Dimensions
Enclosed metal chassis with perforated ventilation. All dimensions in mm, tolerance ±1 mm.
Mechanical
| Length (L) | 159 mm |
| Width (W) | 97 mm |
| Height (H) | 38 mm |
| Weight | Approx. 0.51 kg |
| Housing | Enclosed metal chassis with vents |
Clearances & Mounting
| Top / Bottom | 40 mm / 20 mm |
| Left / Right | 5 mm / 5 mm |
| Adjacent Heat Source | Keep at least 100 mm clearance |
| Mounting | Chassis base mounting holes |
| Cooling | Free air convection (no fan) |
Installation
S-50-24 Installation
The S-50-24 uses an enclosed chassis design for standalone mounting inside industrial equipment.
01 / 06
Chassis Mounting
Mount the unit on a flat metal surface using the chassis base mounting holes. Secure the unit to prevent vibration and movement.
02 / 06
Ventilation Clearance
Allow at least 5 mm left/right, 40 mm above and 20 mm below. Do not block the perforated ventilation openings.
03 / 06
Input Voltage Selector
Set the 115V/230V selector switch to match the actual mains voltage before applying power. Wrong setting can damage the unit.
04 / 06
FG to PE Required
The FG terminal (Pin 3) must be connected to PE (Protective Earth) for safety and EMC performance.
05 / 06
Temperature & Derating
-10 to +60°C. Derate above +50°C according to the output load derating curve.
06 / 06
Indoor Use Only
Install in a dry, well-ventilated location. Do not install near water or in high-moisture environments.
Wiring
S-50-24 Wiring & Terminal
5-pin screw terminal block. Verify pin numbering before wiring.
Terminal Block — 5 Pins
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | FG (must connect to PE) |
| 4 | DC OUTPUT −V |
| 5 | DC OUTPUT +V |
Wiring Specification
| Screw Torque | 5–6 kgf-cm (4.4–5.2 Lb-in) |
| Wire Type | Stranded copper only, 80°C minimum |
| Recommended Wire (2.1A) | 18 AWG (0.75 mm²) or larger |
| Wire Strapping Length | 5 mm (0.197") |
| Screwdriver | 3 mm slotted |
| FG Connection | Must be connected to PE |
Verify the input voltage selector switch position before applying power. The FG pin (Pin 3) must be connected to PE. Do not connect the primary and secondary sides together.
Output Voltage Adjustment
The S-50-24 includes a front-panel +V ADJ potentiometer with a 22.6–26.4V range and a power-on LED indicator. Output current and wattage must not exceed the rated 2.1A / 50.4W.
Safety
S-50-24 Safety & Cautions
- Qualified technician only. Do not remove the case yourself.
- Do not connect primary and secondary sides together — electric shock / arc hazard.
- Burn hazard. Do not touch the unit in operation and shortly after disconnection.
- Protect ventilation openings from foreign objects and dripping liquids.
- FG (Pin 3) must be connected to PE (Protective Earth).
- Do not exceed 2.1A / 50.4W rated output.
- Disconnect the system from supply voltage before installation, maintenance or modification.
- Verify the input voltage selector switch position before applying power.
- Component for final equipment; final EMC must be re-confirmed.
Applications
S-50-24 Industrial Applications
24V Relay Banks
Sensor Circuits
Industrial Control Systems
Small Solenoid Loads
Electronic Instruments
LED Lighting
Security Systems
General 24V Equipment
Next Step
Need the S-50-24 (SY06)?
Contact DAPPRA Automation — or explore the full S Series.
Support
S-50-24 FAQ
What is the DAPPRA S-50-24 (SY06)?
The S-50-24 (internal code SY06) is a 50.4W single-output enclosed switching power supply delivering 24V DC at 2.1A. It belongs to the DAPPRA S Series conventional enclosed platform, uses selectable AC input 85–132VAC / 170–264VAC by switch (or 240–370VDC), achieves 82% typical efficiency, and uses free air convection cooling without a fan.
What is the input voltage range of the S-50-24?
The S-50-24 uses selectable AC input: 85–132VAC or 170–264VAC selected by an external switch, or 240–370VDC. Input frequency is 47–63Hz.
What output voltage and current does the S-50-24 provide?
The S-50-24 provides 24V DC at 2.1A for a rated output of 50.4W. The output voltage adjustment range is 22.6–26.4V via the front-panel +V ADJ potentiometer.
Does the S-50-24 require a cooling fan?
No. The S-50-24 uses free air convection cooling without a fan. It is designed for quiet, low-maintenance installations.
What is the efficiency of the S-50-24?
The S-50-24 achieves 82% typical efficiency at 230VAC input and rated load.
What are the dimensions of the S-50-24?
The S-50-24 measures 159 × 97 × 38 mm (L × W × H) in an enclosed metal chassis with ventilation vents. Weight is approximately 0.51 kg.
What protections does the S-50-24 include?
The S-50-24 includes short circuit protection and overload protection (105–150% rated output power, fold-back current limiting, auto-recovery).
What is the terminal pin assignment of the S-50-24?
The S-50-24 uses a 5-pin terminal block: Pin 1 = AC/L, Pin 2 = AC/N, Pin 3 = FG (Frame Ground), Pin 4 = DC OUTPUT −V, Pin 5 = DC OUTPUT +V. FG must be connected to PE.
What is the operating temperature range of the S-50-24?
The S-50-24 operates from -10°C to +60°C with derating required above +50°C.
What certifications does the S-50-24 have?
The S-50-24 is designed referring to UL1012 and FCC Part15 J Conduction Class B. Confirm the specific marking on the DAPPRA-labeled unit.
What is the warranty period for the S-50-24?
The S-50-24 comes with a 1-year warranty.
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Overview
S-50-24 (SY06) Overview
The DAPPRA S-50-24 (internal code SY06) is a 50.4W single-output enclosed switching power supply delivering 24V DC at 2.1A. It belongs to the S Series conventional enclosed platform, which uses a metal chassis with perforated ventilation and selectable AC input by switch — a cost-effective solution for general industrial and commercial loads that require a single fixed 24V rail.
The S-50-24 uses selectable AC input: 85–132VAC or 170–264VAC via an external selector switch, or 240–370VDC. Efficiency is 82% typical. Free air convection cooling is used without a fan, so the unit operates quietly and requires no fan maintenance. The output voltage can be trimmed from 22.6V to 26.4V via the front-panel +V ADJ potentiometer.
The enclosed metal chassis measures 159 × 97 × 38 mm and weighs approximately 0.51 kg. Protection includes short circuit and overload protection (105–150% fold-back current limiting, auto-recovery). The S-50-24 is suited to 24V relay banks, sensor circuits, small solenoid loads and general 24V industrial control applications where 2.1A is sufficient.
Key Features
S-50-24 Key Features
A 50W 24V enclosed power supply with selectable AC input and fanless cooling.
- 50.4W Output · 24V / 2.1A24V DC at 2.1A (0–2.1A), 50.4W. +V ADJ range 22.6–26.4V.
- Selectable AC Input by Switch85–132VAC / 170–264VAC selected by external switch, or 240–370VDC.
- 82% Typical EfficiencyBalanced efficiency for a conventional 50W enclosed chassis.
- Free Air Convection CoolingNo fan — quiet operation, no dust intake through a fan, no fan maintenance.
- Enclosed Metal Chassis with Vents159 × 97 × 38 mm chassis with perforated ventilation for heat dissipation.
- Overload Protection 105–150%Fold-back current limiting, auto-recovery after fault removal.
- Short Circuit ProtectionProtected output with auto-recovery.
- LED Power-On IndicatorFront-panel LED for quick visual status check.
- -10°C to +60°C Operating RangeWith derating above +50°C.
- Compact 0.51 kg Enclosed UnitSuitable for standalone mounting inside control cabinets and equipment.
Specifications
S-50-24 (SY06) Specifications
Output
| Model | S-50-24 (SY06) |
| DC Voltage | 24V |
| Rated Current | 2.1A |
| Current Range | 0–2.1A |
| Rated Power | 50.4W |
| Voltage Adjustment | 22.6–26.4V |
| Voltage Tolerance | ±1.0% |
| Line Regulation | ±0.5% |
| Load Regulation | ±0.5% |
| Ripple & Noise (max.) | 100mVp-p |
| Setup / Rise / Hold-up | 200ms / 100ms / 20ms at full load |
Protection
| Overload | 105–150% rated output, fold-back current limiting, auto-recovery |
| Short Circuit | Protected, auto-recovery |
Input
| Voltage | 85–132VAC / 170–264VAC (selectable by switch) · 240–370VDC |
| Frequency | 47–63Hz |
| AC Current (typ.) | 1.3A @ 115VAC · 0.65A @ 230VAC |
| Inrush Current (max.) | 18A @ 115VAC · 36A @ 230VAC (cold start) |
| Leakage Current | <1mA @ 240VAC |
| Efficiency (typ.) | 82% |
Switching Frequency
| Fixed Switching Frequency | 27 kHz |
Environment
| Working Temperature | -10 ~ +60°C (derating above +50°C) |
| Storage Temperature | -20 ~ +85°C |
| Working Humidity | 20–90% RH non-condensing |
| Temperature Coefficient | 0.03%/°C (0 ~ 50°C) |
| Vibration | 10–500Hz, 2G, 10min/cycle, 60min each axis |
Safety & EMC
| Safety Standards | Design refer to UL1012 |
| Withstand Voltage | I/P–O/P: 1.5kVAC · I/P–FG: 1.5kVAC · O/P–FG: 0.5kVAC |
| Isolation Resistance | 100MΩ / 500VDC |
| EMC Emission | Design refer to FCC Part15 J Conduction Class B |
Mechanical
| Dimensions (L×W×H) | 159 × 97 × 38 mm |
| Weight | Approx. 0.51 kg |
| Housing | Enclosed metal chassis with vents |
| Cooling | Free air convection (fanless) |
| Warranty | 1 Year |
Terminal Assignment
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | FG (must connect to PE) |
| 4 | DC OUTPUT −V |
| 5 | DC OUTPUT +V |
Notes
24V / 2.1A / 50.4W. Selectable AC input by switch — verify the switch position before applying power. 5-pin terminal: AC/L, AC/N, FG, −V, +V. Fanless, 159 × 97 × 38 mm. Derating above +50°C. 1-year warranty.
Dimensions
S-50-24 Dimensions
Enclosed metal chassis with perforated ventilation. All dimensions in mm, tolerance ±1 mm.
Mechanical
| Length (L) | 159 mm |
| Width (W) | 97 mm |
| Height (H) | 38 mm |
| Weight | Approx. 0.51 kg |
| Housing | Enclosed metal chassis with vents |
Clearances & Mounting
| Top / Bottom | 40 mm / 20 mm |
| Left / Right | 5 mm / 5 mm |
| Adjacent Heat Source | Keep at least 100 mm clearance |
| Mounting | Chassis base mounting holes |
| Cooling | Free air convection (no fan) |
Installation
S-50-24 Installation
The S-50-24 uses an enclosed chassis design for standalone mounting inside industrial equipment.
01 / 06
Chassis Mounting
Mount the unit on a flat metal surface using the chassis base mounting holes. Secure the unit to prevent vibration and movement.
02 / 06
Ventilation Clearance
Allow at least 5 mm left/right, 40 mm above and 20 mm below. Do not block the perforated ventilation openings.
03 / 06
Input Voltage Selector
Set the 115V/230V selector switch to match the actual mains voltage before applying power. Wrong setting can damage the unit.
04 / 06
FG to PE Required
The FG terminal (Pin 3) must be connected to PE (Protective Earth) for safety and EMC performance.
05 / 06
Temperature & Derating
-10 to +60°C. Derate above +50°C according to the output load derating curve.
06 / 06
Indoor Use Only
Install in a dry, well-ventilated location. Do not install near water or in high-moisture environments.
Wiring
S-50-24 Wiring & Terminal
5-pin screw terminal block. Verify pin numbering before wiring.
Terminal Block — 5 Pins
| Pin | Function |
|---|---|
| 1 | AC/L |
| 2 | AC/N |
| 3 | FG (must connect to PE) |
| 4 | DC OUTPUT −V |
| 5 | DC OUTPUT +V |
Wiring Specification
| Screw Torque | 5–6 kgf-cm (4.4–5.2 Lb-in) |
| Wire Type | Stranded copper only, 80°C minimum |
| Recommended Wire (2.1A) | 18 AWG (0.75 mm²) or larger |
| Wire Strapping Length | 5 mm (0.197") |
| Screwdriver | 3 mm slotted |
| FG Connection | Must be connected to PE |
Verify the input voltage selector switch position before applying power. The FG pin (Pin 3) must be connected to PE. Do not connect the primary and secondary sides together.
Output Voltage Adjustment
The S-50-24 includes a front-panel +V ADJ potentiometer with a 22.6–26.4V range and a power-on LED indicator. Output current and wattage must not exceed the rated 2.1A / 50.4W.
Safety
S-50-24 Safety & Cautions
- Qualified technician only. Do not remove the case yourself.
- Do not connect primary and secondary sides together — electric shock / arc hazard.
- Burn hazard. Do not touch the unit in operation and shortly after disconnection.
- Protect ventilation openings from foreign objects and dripping liquids.
- FG (Pin 3) must be connected to PE (Protective Earth).
- Do not exceed 2.1A / 50.4W rated output.
- Disconnect the system from supply voltage before installation, maintenance or modification.
- Verify the input voltage selector switch position before applying power.
- Component for final equipment; final EMC must be re-confirmed.
Applications
S-50-24 Industrial Applications
24V Relay Banks
Sensor Circuits
Industrial Control Systems
Small Solenoid Loads
Electronic Instruments
LED Lighting
Security Systems
General 24V Equipment
Next Step
Need the S-50-24 (SY06)?
Contact DAPPRA Automation — or explore the full S Series.
Support
S-50-24 FAQ
What is the DAPPRA S-50-24 (SY06)?
The S-50-24 (internal code SY06) is a 50.4W single-output enclosed switching power supply delivering 24V DC at 2.1A. It belongs to the DAPPRA S Series conventional enclosed platform, uses selectable AC input 85–132VAC / 170–264VAC by switch (or 240–370VDC), achieves 82% typical efficiency, and uses free air convection cooling without a fan.
What is the input voltage range of the S-50-24?
The S-50-24 uses selectable AC input: 85–132VAC or 170–264VAC selected by an external switch, or 240–370VDC. Input frequency is 47–63Hz.
What output voltage and current does the S-50-24 provide?
The S-50-24 provides 24V DC at 2.1A for a rated output of 50.4W. The output voltage adjustment range is 22.6–26.4V via the front-panel +V ADJ potentiometer.
Does the S-50-24 require a cooling fan?
No. The S-50-24 uses free air convection cooling without a fan. It is designed for quiet, low-maintenance installations.
What is the efficiency of the S-50-24?
The S-50-24 achieves 82% typical efficiency at 230VAC input and rated load.
What are the dimensions of the S-50-24?
The S-50-24 measures 159 × 97 × 38 mm (L × W × H) in an enclosed metal chassis with ventilation vents. Weight is approximately 0.51 kg.
What protections does the S-50-24 include?
The S-50-24 includes short circuit protection and overload protection (105–150% rated output power, fold-back current limiting, auto-recovery).
What is the terminal pin assignment of the S-50-24?
The S-50-24 uses a 5-pin terminal block: Pin 1 = AC/L, Pin 2 = AC/N, Pin 3 = FG (Frame Ground), Pin 4 = DC OUTPUT −V, Pin 5 = DC OUTPUT +V. FG must be connected to PE.
What is the operating temperature range of the S-50-24?
The S-50-24 operates from -10°C to +60°C with derating required above +50°C.
What certifications does the S-50-24 have?
The S-50-24 is designed referring to UL1012 and FCC Part15 J Conduction Class B. Confirm the specific marking on the DAPPRA-labeled unit.
What is the warranty period for the S-50-24?
The S-50-24 comes with a 1-year warranty.
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