1. Introduction
This manual provides essential information for the safe and efficient operation of your HJS-480-0-60 Adjustable Switching Power Supply. This device is designed to provide a stable DC voltage output, adjustable from 0 to 60V, with a maximum current of 8A and a rated power of 480W. It features a digital display for easy monitoring of output parameters.
It is primarily used in various DC equipment applications, including DC motor stepless speed regulation, LED electrodeless dimming, chemical plating, speed control, and for scientific research, testing, and educational purposes.
2. Important Safety Warnings
Please read and understand all safety instructions before operating the power supply. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Input Voltage Selection: Before powering on, ensure the 110V/220V switch on the unit is set correctly to match your local AC input voltage to avoid damage.
- Ventilation: Ensure adequate ventilation around the power supply. Do not block cooling vents.
- Environment: Store and operate the device in a ventilated and dry environment, away from flammable materials. Avoid condensation.
- Load Compatibility: The maximum current is 8A and is not adjustable. The actual current is determined by the connected load. Do not connect devices that require more than 8A.
- Inductive Loads: When using with inductive loads such as motors or fans, be aware of the motor's maximum starting current. This parameter should not exceed the power supply's maximum current capacity to prevent damage. Consider using a power supply with higher current capacity or a soft-start protection circuit for inductive loads.
- Power Usage: To ensure the longevity of the power supply, it is recommended not to operate it at full load continuously. The recommended maximum continuous use power should be 80% of the rated power (e.g., for a 500W unit, use up to 400W).
- Battery Charging (if applicable): If used as a charger, always unplug the battery and turn off the input power when not in use. Charge within your line of sight. If you must leave, remove the battery to prevent hazards. Do not mix different types, capacities, or manufacturers' batteries. Monitor battery temperature; disconnect immediately if it becomes excessively hot.
- Foreign Objects: Do not drop wires or other conductive objects into the power supply.
- Damaged Batteries: Do not attempt to charge batteries that are leaking, swollen, peeled, discolored, or deformed.
- Non-Rechargeable Batteries: Do not attempt to charge non-rechargeable batteries.
- Modification: Do not modify or disassemble the power supply. Doing so voids all warranties and technical support.
3. Product Overview
The HJS-480-0-60 is a compact and robust switching power supply designed for various DC applications. It features an adjustable output voltage, a digital display, and multiple protection mechanisms.
4. Technical Specifications
| Feature | Specification |
|---|---|
| Model Number | HJS-480-0-60 |
| Output Power | 480W |
| Output Voltage | DC 0-60V (Adjustable) |
| Output Current | 8A (Maximum, not adjustable) |
| Input Voltage | AC 110V/220V (Selectable) |
| Output Frequency | 47-63Hz |
| Output Type | SINGLE |
| Product Size (L*W*H) | 21.5CM * 11.5CM * 5CM |
| Protection Functions | Short-circuit, Overload, Overvoltage (Self-recovery) |
| Burn-in Test | 100% full load |
| Start Impact Current | 20A@120VAC (cold start) |
| Output Range | +/- 100% (rated output voltage) |
| Output Start Time | 2S@120VAC, 1.0S@230VAC |
| Output Hold Time | >10mS@120VAC, >20mS@230VAC |
| Insulation Strength (Input-Output) | AC1500V, 1min |
| Insulation Strength (Input-Case) | AC1500V, 1min |
| Insulation Strength (Output-Case) | DC500V, 1min |
| Working Environment | -10 to 50 °C; 20% ~ 90%RH (non-condensing) |
| EMC Standard | EN55022 Class B reference design; EN61000-4-2/-3/-4/-5/-6/-11 |
Diagram Details:
- Mechanical Dimensions: Provides detailed measurements in millimeters for mounting and integration.
- Internal Circuit Block Diagram: Illustrates the main components and signal flow, including input rectifier, filter, PWM control, and output stages.
- Load Derating Curve: Shows the maximum permissible output power as a function of ambient temperature, indicating a reduction in capacity at higher temperatures.
- Static Characteristic Curve: Depicts the relationship between output voltage and input voltage at a constant load, demonstrating the stability of the output.
5. Setup and Installation
- Unpacking: Carefully remove the power supply from its packaging. Inspect for any visible damage.
- Input Voltage Selection: Locate the 110V/220V selector switch on the rear of the unit (refer to Figure 3.3). Before connecting to AC power, ensure this switch is set to match your local mains voltage (110V or 220V) to prevent severe damage to the unit.
Figure 5.1: Input Voltage Selector Switch. - Mounting (Optional): The unit can be mounted using the provided mounting holes. Ensure proper airflow for cooling. Refer to Figure 4.1 for mechanical dimensions.
- Wiring Connections:
- AC Input: Connect your AC mains power to the 'L' (Live), 'N' (Neutral), and 'FG' (Frame Ground) terminals. Ensure secure connections.
- DC Output: Connect your DC load to the '+V' (Positive Output) and '-V' (Negative Output) terminals. Observe correct polarity.
- Voltage Adjustment: The output voltage can be adjusted using the knob labeled 'V.ADJ' on the front panel.
Figure 5.2: Terminal Block and Voltage Adjustment Knob. - Initial Check: Before connecting any sensitive equipment, double-check all wiring and the input voltage selection.
6. Operating Instructions
- Power On: After ensuring all connections are correct and the input voltage switch is set, connect the power supply to the AC mains. The digital display should illuminate, showing the current output voltage.
- Adjusting Output Voltage: Use the 'V.ADJ' knob on the front panel to adjust the DC output voltage to your desired level. The digital display will show the set voltage.
- Connecting Load: Once the desired voltage is set, connect your DC equipment to the '+V' and '-V' terminals. The power supply will automatically provide the necessary current up to its maximum of 8A, as determined by your load.
- Monitoring: The digital display continuously shows the output voltage. While the current is not directly adjustable, ensure your load does not attempt to draw more than 8A.
- Power Off: To turn off the power supply, first disconnect the load, then disconnect the AC mains power.
Power Calculation
The power (in Watts) consumed by your load can be calculated using the formula: Voltage (V) × Current (A) = Power (W).
For example:
- If you connect equipment drawing 6A at 20V, the power is 20V × 6A = 120W.
- If you connect equipment drawing 5A at 48V, the power is 48V × 5A = 240W.
Always ensure the total power required by your load does not exceed 80% of the power supply's rated power (480W * 0.8 = 384W) for optimal performance and longevity.
7. Maintenance
- Cleaning: Keep the power supply clean and free from dust. Use a soft, dry cloth for cleaning. Do not use liquid cleaners.
- Ventilation: Regularly check that the cooling vents are not obstructed to ensure proper heat dissipation.
- Storage: If not in use for an extended period, store the power supply in a cool, dry, and well-ventilated area.
- Inspection: Periodically inspect the power cords and terminals for any signs of wear or damage. Replace if necessary.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No output voltage / Digital display off |
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| Output voltage unstable or incorrect |
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| Unit gets excessively hot |
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If the problem persists after trying these solutions, please contact customer support.
9. User Tips
Based on common user experiences, here are some helpful tips:
- Always verify the input voltage switch (110V/220V) before plugging in the power supply to avoid immediate damage.
- When connecting wires to the terminal block, ensure they are stripped to the correct length and securely fastened to prevent loose connections and potential arcing.
- For applications requiring precise voltage, use a multimeter to verify the output voltage, especially after adjusting the knob, as the built-in digital display provides a general indication.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the seller's policies or contact the point of purchase. Please note that unauthorized modification or disassembly of the product will void the warranty.