1. Product Overview
The Diymore XY6530S and XY6550S are advanced CNC DC adjustable step-down power supply modules designed for precise voltage and current regulation. These modules feature a full-view 1.8-inch high-brightness true-color LCD with customizable color schemes and 4-way rotation for optimal readability. They support firmware upgrades, MPPT solar charging, and serial communication, offering comprehensive protection against input reverse polarity and output backflow.
The display board is crafted with a gold-plated design for enhanced oxidation resistance, conductivity, and durability. An intelligent temperature-controlled PWM stepless speed fan, coupled with a large-area heat sink, ensures low noise and high lifespan, promoting stable and efficient operation.

2. Safety Information
Please read and understand all safety instructions before operating the device. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Ensure proper input voltage and current limits are observed to prevent damage to the module and connected devices.
- Always connect the input power correctly, observing polarity. The module includes input reverse polarity protection.
- Avoid short circuits at the output. The module features output backflow protection.
- Do not operate the module in wet or damp conditions.
- Ensure adequate ventilation around the module, especially for the heat sink and fan, to prevent overheating.
- Disconnect power before making any connections or disconnections.
3. Setup and Connections
3.1 Physical Dimensions

The power module (bare board) has dimensions of 126mm x 85.5mm x 43mm (H). The display unit has dimensions of 86mm x 40mm x 28mm. The recommended opening size for panel mounting the display unit is 81.6mm x 40.6mm.
3.2 Wiring Diagram
Connect the input power source to the IN+ and IN- terminals on the power module. Connect your load to the OUT+ and OUT- terminals. The display unit connects to the power module via the provided cable and serial communication interface.

Key Connection Points:
- IN+ / IN-: Input power terminals.
- OUT+ / OUT-: Output power terminals.
- Power Switch (hard switch ON/OFF): Located on the power module.
- Serial Communication Interface: GND, RX, TX, 5V pins for connecting the display unit and external communication.
- 10k NTC 3950B External Temperature Sensor Interface: For connecting an optional temperature sensor.
- MPPT Hardware Switch: With an indicator light illuminating upon MPPT activation.
3.3 Remote Control Module Connection
The power supply supports control via optional Infrared (IR) and 433M Wireless Remote Control Modules. Connect these modules to the appropriate ports on the power supply for remote operation.

4. Operating Instructions
4.1 Display Interface
The 1.8-inch full-view high-brightness true-color LCD provides various user interfaces for monitoring and control.

The display supports 8 color options, allowing you to customize the interface colors to your preference. It also supports 4-way rotation for reading test data from any angle.

4.2 Button Functions

- V-SET Button:
- Short Press: Set output voltage (CV mode).
- Long Press: Quickly call up data set M1. - SW Button:
- Short Press: Enter quick settings.
- Long Press: Enable four-way screen rotation. - I-SET Button:
- Short Press: Set output current (CC mode).
- Long Press: Enter or exit the data group settings UI. - Encoder Button:
- Short Press: Shift (move cursor/selection).
- Long Press: Lock the buttons to prevent accidental changes. - Power Button (ON/OFF):
- Short Press: Turn power output on/off.
- Long Press: Shut down the device.
4.3 Lock Function
To lock the buttons and prevent accidental changes, hold the encoder button for more than 2 seconds. To unlock, hold the encoder button for more than 2 seconds again.
4.4 Quickly Recall Data Sets
Hold the V-SET button to quickly load the M1 data set. To select other data sets, hold the I-SET button to open the data set selection window. Rotate the encoder to choose the desired data set, then either hold I-SET or briefly press the SW/encoder button to load it. The interface will display the currently loaded data set.
4.5 Quickly Adjust System Parameters in the Status Bar
On the main screen, briefly press the SW button to select a status bar parameter. Rotate the encoder to switch between parameters. Briefly press the SW button or encoder button to adjust the parameter or open the parameter setting interface. Use the encoder to set the value. To save and exit, either hold the SW button/encoder button or wait 6 seconds without any button press. All settings are saved automatically.
4.6 Remote Control Operation
The power supply can be operated using compatible IR or 433M wireless remote control modules. Use the remote to adjust settings and control the output.
Video 1: Product Demonstration (Setting voltage/current, menu navigation, remote control)
4.7 Network Control
The module supports LAN penetration and real-time communication for remote control via an external network. This allows for unlimited distance control, email notifications, and cloud record keeping. Mobile apps (Android/iOS) and PC host software are available for control.

5. Specifications
| Parameter | XY6530S | XY6550S |
|---|---|---|
| Product Name | Digital DC Step-Down Power Supply | |
| Input Voltage | 12.00~75.00V | 12.00~70.0V |
| Output Voltage | 0~65.0V | 0~65.00V |
| Output Current | 0~30.00A | 0~50.00A |
| Output Power | 2000W | 3250W |
| Voltage Resolution | 0.01V | |
| Stored Data Sets | 10 sets | |
| Conversion Efficiency | Approx. 95% | |
| Operating Temperature | 60°C - 80°C | |
| Display Size | 1.8 inches (Full-view true-color LCD) | |
| Package | SOP | |
6. Troubleshooting
- No Output Power: Check input power connections, ensure the hard ON/OFF switch on the power module is engaged, and verify the display unit's power button is pressed (green light indicates ON).
- Incorrect Voltage/Current Readings: Ensure all connections are secure. Calibrate if necessary (refer to advanced settings in the PDF manual).
- Overheating: Check for obstructions around the fan and heat sink. Ensure the fan is operating correctly. Reduce load if operating continuously at maximum power.
- Display Issues: If the display is unresponsive or shows errors, try restarting the module. Check cable connections between the power module and display.
- Protection Triggered: The module has built-in protections (OVP, LVP, OCP, OPP, OTP). If output is cut off, check for over-voltage, under-voltage, over-current, over-power, or over-temperature conditions and resolve them before restarting.
7. Maintenance
- Cleaning: Regularly clean the module and display with a soft, dry cloth. Do not use liquids or abrasive cleaners. Ensure the fan and heat sink are free from dust and debris to maintain optimal cooling performance.
- Firmware Updates: The module supports firmware upgrades. Check the manufacturer's website or contact support for the latest firmware versions and update instructions.
- Storage: When not in use for extended periods, store the module in a dry, dust-free environment at room temperature.
8. User Tips
- Start with Low Settings: When connecting a new load, always start with low voltage and current settings and gradually increase them to avoid damaging your components.
- Monitor Temperature: While the module has over-temperature protection, it's good practice to monitor the module's temperature, especially during high-power operation.
- Utilize Data Sets: For recurring tasks, save your frequently used voltage and current settings into the 10 available data sets for quick recall.
- Remote Control Convenience: If your setup requires frequent adjustments or is in a hard-to-reach location, consider using the optional remote control modules for added convenience.
- Network Monitoring: For long-term projects or remote applications, leverage the network control features to monitor and adjust the power supply from your PC or mobile device.
9. Additional Resources
For more detailed information, including advanced settings and specific wiring diagrams, please refer to the official user manual (PDF) available at: User Manual (PDF)





