1. Introduction and Overview
The SK120X is a third-generation upgraded NC Lift Voltage DC Adjustable Regulated Power Supply designed for precise voltage and current control. It features a large, all-viewing-angle VA color LCD screen for clear display of parameters and easy operation. This module is suitable for various engineering projects requiring stable and adjustable power output, including solar charging applications.
Key features include:
- CNC voltage and current adjustment for high precision.
- Professional power liquid crystal display with a clear interface.
- Comprehensive hardware and software protection mechanisms.
- Ability to set default adjustment voltage or constant current values for quick application.
- Voltage and current locking to prevent accidental changes.
2. Product Components and Setup
The SK120X module incorporates robust components and various interfaces for versatile use. Before operation, familiarize yourself with the physical layout and connection points.
2.1. Physical Connections
- Input Power: Connect your DC power source to the IN+ and IN- terminals. Ensure the input voltage is within the specified range of DC 5.0V-30V. For optimal performance, an input voltage above 7V is recommended.
- Output Load: Connect your load or battery to the OUT+ and OUT- terminals. The module features anti-backflow protection, allowing direct connection to a battery for charging without an additional diode.
- External Temperature Sensor: If desired, connect a 10k NTC 3905B external temperature probe to the dedicated interface. The device will automatically display the probe's temperature.
2.2. Communication Interfaces
The SK120X supports various communication options:
- Serial Communication: A serial communication interface is available.
- XY-K485X Module: Can be connected to an XY-K485X module for 485 bus control.
- WiFi Module: Connect a WiFi module for remote control via an APP and web-based networking.
- Infrared Receiver Module: Connect an infrared receiver module for efficient and fast remote control.
3. Operating Instructions
The SK120X features an intuitive UI for monitoring and setting parameters.
3.1. Product UI Function Details
When the power supply is ON, the main UI displays output voltage (CV), output current (A), and output power (W). The encoder button can be pressed to toggle through additional displays such as capacity (Ah), energy (Wh), time (h), and temperature (°C).
When the power is OFF, the set voltage (CV) and set current (CC) are displayed alternately. If an external temperature probe is connected, its temperature will also be displayed.
3.2. UI Parameter Settings
To enter the settings menu:
- Press and hold the SET button on the main interface.
- The first parameter displayed allows you to select the data group (e.g., Cxd-x).
- Briefly press VSET to select the next parameter.
- Briefly press ISET to select the previous parameter.
- To adjust a parameter value, rotate the encoder.
- After completing your settings, press and hold the ISET/SW/encoder button to exit the settings interface.
Available parameters include:
- Cxd-x: Select data group.
- SET CV: Set output voltage.
- SET CC: Set output current.
- LVP: Input undervoltage protection (default 5.5V).
- OVP: Output overvoltage protection (default 38V).
- OCP: Output overcurrent protection (default 6.2A).
- OPP: Output overpower protection (default 125W).
- OAH: Overcapacity protection (default OFF).
- OPH: Overenergy protection (default OFF).
- OHP: Overtime protection (default OFF).
- OTP: Overtemperature protection (default 95°C).
- ETP: External overtemperature protection (default OFF).
- PON: Automatically enabled during power-on (default OFF).
4. Maintenance
No specific maintenance procedures are provided for this product. It is recommended to keep the device clean and free from dust. Ensure proper ventilation to prevent overheating, especially during high-power operation.
5. Troubleshooting
The SK120X is equipped with several built-in protection features to ensure safe operation and prevent damage. If the device unexpectedly shuts down or does not operate as expected, consider the following:
- Input Undervoltage Protection (LVP): If the input voltage drops below 4.7V (or the set LVP value), the device may reduce output power or shut down. Ensure your input power source is stable and provides sufficient voltage (recommended >7V).
- Output Overvoltage Protection (OVP): If the output voltage exceeds the set OVP limit (default 38V), the device will activate protection. Check your load and settings.
- Output Overcurrent Protection (OCP): If the output current exceeds the set OCP limit (default 6.2A), the device will activate protection. Verify your load's current draw and adjust settings if necessary.
- Output Overpower Protection (OPP): If the output power exceeds the set OPP limit (default 125W), the device will activate protection. Reduce the load or ensure adequate cooling.
- Overtemperature Protection (OTP): If the internal temperature reaches 100°C (or the set OTP limit), the device will shut down to prevent damage. Ensure the fan is unobstructed and the device has sufficient ventilation.
- Input Reverse Connection Protection: The device is protected against reverse connection at the input terminals. If connected incorrectly, it will not burn, but it will not operate. Correct the polarity.
- Output Short Circuit Protection: The output terminals are protected against short circuits. If a short circuit occurs, the device will not be damaged. Remove the short circuit.
- Output Anti-backflow: When charging a battery, the anti-backflow protection prevents current from flowing back into the power supply. If charging is not occurring, check battery connections.
6. Specifications
| Parameter | Value |
|---|---|
| Input Voltage | DC 5.0V - 30V (LVP below 4.7V, recommended >7V) |
| Output Voltage | DC 0.6V - 30V |
| Output Current | 0 - 4.0A |
| Output Power | 35W (natural heat dissipation), 50W (air cooling). Max 150W (software supported, optimal cooling). |
| Voltage Accuracy | 0.5% + 1 word, Resolution: 0.01V |
| Current Accuracy | 0.8% + 3 words, Resolution: 0.001A |
| Conversion Efficiency | Approximately 88% |
| Soft Start | Yes |
| Input Reverse Connection Protection | Yes |
| Output Anti-backflow | Yes |
| Output Short Circuit Protection | Yes |
| Overtemperature Protection (OTP) | Yes, at 100°C |
| Operating Frequency | 180KHz |
| Material | Plastic |
| Color | White |
| Dimensions (L x W x H) | 11 cm x 7 cm x 5 cm |
| Weight | 0.15 kg |
6.1. Product Views
7. User Tips
No specific user tips were available from reviews or Q&A for this product. However, based on the product's features, here are some general tips:
- Always ensure your input voltage is stable and within the specified range to prevent triggering undervoltage protection.
- When operating at higher power outputs (above 35W), ensure adequate airflow around the device or use active air cooling to prevent overtemperature protection from activating.
- Utilize the voltage and current locking feature to prevent accidental changes to your settings during critical operations.
- Familiarize yourself with the various protection settings (OVP, OCP, OPP, OTP, LVP) and adjust them according to your application's requirements for optimal safety and performance.
8. Warranty and Support
No specific warranty information or dedicated support contact details are provided in the product description. For any issues or inquiries, please refer to the seller or your point of purchase.
