1. Product Overview
The Jurtmy SK150C is a versatile 150W adjustable buck-boost DC power supply module designed for a wide range of applications. It features a broad input voltage range of 7-36V and an adjustable output of 0.5-40V with up to 8A current, capable of delivering a maximum of 150W. Equipped with a 1.8-inch color screen, it provides real-time monitoring of voltage, current, and power. The module incorporates an independent silicone keypad for precise control and multiple safety protections, including overvoltage, overcurrent, overload, overtemperature, reverse polarity, and backflow protection. It also supports communication via Modbus protocol, serial port, and app control (with an optional Bluetooth module).
Figure 1: Front view of the SK150C Adjustable Buck-Boost DC Power Supply Module, showing the display and control buttons.
2. Key Features
- Flexible Input Range: Designed to handle input voltages between 7V and 36V, making it adaptable for various electronic setups.
- High Output Capability: Adjustable output voltage from 0.5V to 40V at a maximum of 8A ensures compatibility with many devices requiring different power levels, up to 150W.
- Clear Monitoring Display: The vivid 1.8-inch color screen enables users to monitor voltage, current, and power in real-time effectively.
- Easy-to-Use Interface: Independent silicone keypad offers a comfortable touch experience while providing precise control over settings.
- Safety First with Protection Features: Multiple safety mechanisms including Overvoltage Protection (OVP), Overcurrent Protection (OCP), Overload Protection (OPP), Overtemperature Protection (OTP), reverse polarity protection, and backflow protection help prevent damage during operation.
- Communication Support: Supports standard Modbus protocol, serial port, and app control (compatible Bluetooth module required, sold separately).
3. Specifications
| Parameter | Value |
|---|---|
| Part Name | SK150C Adjustable Buck-Boost DC Power Supply Module |
| Material | ABS |
| Color | As Picture Show (Black) |
| Dimensions | 83 x 48 x 48 mm |
| Input Voltage | 7-36V DC |
| Output Voltage | 0.5-40V DC, adjustable |
| Output Current | 0-8A, adjustable |
| Output Power | Maximum 150W |
| Conversion Efficiency | ~88% |
| Screen Size | 1.8-inch (36 x 29 mm) color screen |
| Operating Temperature | -40°C to 80°C |
| Waterproof/Dustproof Rating | IP20 (not waterproof) |
| Protection Type | OVP, OCP, OPP, OTP, reverse polarity protection, backflow protection |
| Communication | Supports Modbus protocol, connects to PC/app (compatible Bluetooth/USB module optional) |
| Item Weight | 250 g |
4. Setup and Connections
Before operating the SK150C module, ensure all connections are secure and correct. The module requires a DC input voltage between 7V and 36V. Output connections should be made to your load.
Figure 2: Internal view of the SK150C module, highlighting the plug-in terminals for power input/output and serial communication pins (+5V, TX, RX, GND) for advanced control.
4.1 Power Connections
- Connect your DC power source (7-36V) to the input terminals. Observe polarity: positive (+) and negative (-).
- Connect your load to the output terminals. Again, observe polarity.
- Ensure all connections are tight to prevent arcing or poor performance.
4.2 Optional Communication Module Connection
For app control or PC communication, an optional Bluetooth or USB module is required (sold separately). Connect this module to the serial communication pins (+5V, TX, RX, GND) as indicated in Figure 2. Refer to the specific module's instructions for detailed setup of the communication interface.
5. Operating Instructions
The SK150C module features an intuitive interface with a color display, silicone buttons, and a rotary encoder for easy operation.
Figure 3: Detailed view of the SK150C control panel, showing the function of each button and the rotary encoder.
5.1 Control Panel Overview
- Display Screen: Shows real-time voltage, current, power, and set parameters (V-SET, I-SET, OVP, OCP).
- M/t Button: Short press to access data group settings.
- V-SET Button: Short press for voltage setting. Long press for OVP (Overvoltage Protection) setting.
- I-SET Button: Short press for current setting. Long press for OCP (Overcurrent Protection) setting.
- OK/↓ Button: Short press to confirm settings.
- Rotary Encoder:
- Rotate left: Switch interface display; decrease number when setting.
- Rotate right: Switch interface display; increase number when setting.
- Short press: Turn on/off output.
- Long press: Sleep shutdown.
- Unlock/Lock Function: The small lock icon on the display indicates if the controls are locked. Use the rotary encoder's short press to toggle output, and long press for sleep shutdown. The specific unlock/lock button is not explicitly labeled but is typically integrated with the rotary encoder or a combination of buttons.
5.2 Setting Voltage and Current
- Press the V-SET button to enter voltage setting mode. The voltage value on the screen will blink.
- Rotate the encoder to adjust the desired output voltage.
- Press the OK/↓ button to confirm the voltage setting.
- Repeat steps 1-3 for current setting using the I-SET button.
5.3 Setting Protection Parameters (OVP, OCP)
- Long press the V-SET button to enter OVP (Overvoltage Protection) setting mode. Adjust with the encoder and confirm with OK/↓.
- Long press the I-SET button to enter OCP (Overcurrent Protection) setting mode. Adjust with the encoder and confirm with OK/↓.
5.4 Output Control
- To turn the output ON or OFF, short press the rotary encoder. The display will indicate the output status.
- To put the module into sleep mode, long press the rotary encoder.
5.5 Calibration Steps
For accurate readings, the module may require calibration. Follow these steps carefully:
Figure 4: Screenshot of the calibration steps for voltage and current, as displayed on the module's screen.
Voltage Calibration:
- Use a multimeter to measure the actual voltage at the output terminal (no load).
- Short press OK/↓ to display "voltage2".
- Use a multimeter to measure the current actual voltage and input at the output end again.
- Short press OK/↓ to complete.
- If calibration is successful, it will display "calibration success". If it fails, "calibration fails" will be displayed. Try to calibrate again if it fails.
Current Calibration:
- Use a multimeter or a digital load to measure the current. Short-circuit the output terminals to measure the current and enter the current value.
- Short press OK/↓ to display "current2".
- Use a multimeter to measure the current at the output end again and input.
- Short press OK/↓ to finish the calibration.
- If calibration is successful, it will display "calibration success". If it fails, "calibration fails" will be displayed. Try to calibrate again if it fails.
Other Settings (from image):
- Backlight: Rotate encoder to adjust backlight brightness (0-5 levels).
- Language: Rotate encoder to switch between English and other languages.
- Rate 115200: Rotate encoder to switch communication rate size.
- Power on output: Rotate encoder to adjust the power-on default output on/off.
- Restore factory: Short press OK/↓ to pop-up calibration restore factory dialog box. Use M/t for cancellation and exit, OK/↓ to determine and exit.
6. Maintenance
To ensure the longevity and optimal performance of your SK150C module, follow these maintenance guidelines:
- Cleaning: Regularly clean the module's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure no dust or debris accumulates in the ventilation openings.
- Environment: Operate and store the module in a dry, well-ventilated area, away from direct sunlight, excessive heat, humidity, and corrosive gases. The module has an IP20 rating, meaning it is not waterproof.
- Connections: Periodically check all input and output connections to ensure they are secure and free from corrosion.
- Storage: If storing the module for an extended period, disconnect it from all power sources and store it in its original packaging or a protective container.
7. Troubleshooting
This section provides solutions to common issues you might encounter with the SK150C module. If the problem persists, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No display/Module not powering on | No input power; incorrect input voltage; reverse polarity connection. | Check input power source and connections. Ensure input voltage is within 7-36V. Verify correct polarity. |
| No output voltage/current | Output is turned off; OVP/OCP triggered; load short circuit; incorrect settings. | Short press the rotary encoder to turn on output. Check OVP/OCP settings and reset if necessary. Verify load connections and ensure no short circuits. Review voltage/current settings. |
| Inaccurate voltage/current readings | Module requires calibration. | Perform voltage and current calibration as described in Section 5.5. |
| Module overheating | Excessive load; poor ventilation; high ambient temperature. | Reduce load. Ensure adequate ventilation around the module. Operate within specified temperature range (-40°C to 80°C). |
| Communication issues (with optional module) | Incorrect wiring; wrong communication settings (baud rate); faulty module. | Verify wiring of the communication module. Check communication rate setting (e.g., 115200). Ensure the optional module is functioning correctly. |
8. Warranty and Support
Jurtmy products are manufactured to high-quality standards. While specific warranty details are not provided in this manual, please retain your proof of purchase for any warranty claims.
8.1 Customer Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please contact Jurtmy customer support through the retailer where you purchased the product or refer to the official Jurtmy website for contact information.
When contacting support, please provide the following information:
- Product Model: SK150C
- Model Number: 6Y582EZ85F1T17T784WN
- Date of Purchase
- A detailed description of the issue