EC Buying WZ5020L CNC Buck Adjustable Power Supply Module Instruction Manual

1. Overview

The EC Buying WZ5020L is a digitally controlled adjustable step-down power supply module. It features an LCD display for real-time monitoring of input/output voltage, current, power, capacity, and time. This module allows for precise adjustment of output voltage (0-50.00V) and current (0-20.00A) and incorporates multiple software protection mechanisms to ensure safe operation.

Image 1.1: The EC Buying WZ5020L CNC Buck Adjustable Power Supply Module, showing the main circuit board and the separate LCD display control panel.

2. Key Features

• LCD Display: Shows input/output voltage, output current, output power, output capacity, and output time.
• Digital Control Adjustment: Accurate and fast step-down output. Output voltage is adjustable from 0-50.00V, and limited current is adjustable from 0-20.00A.
• Reverse Input Protection: The output terminal will not be damaged if connected in reverse.
• Configurable Power-On State: The module can be set to be turned on or off by default upon power application.
• Multiple Software Protection Mechanisms: Adjustable protection thresholds for input under-voltage, output over-voltage, output over-current, timeout, and over-capacity. Output automatically turns off if parameters exceed thresholds.
• High Conversion Efficiency: Utilizes synchronous rectification technology, achieving over 90% efficiency.
• Enhanced Heat Dissipation: Features an enlarged heat sink and an installed fan for effective cooling.

3. Setup and Installation

3.1 Component Identification

Image 3.1: Labeled components of the WZ5020L module, including input/output terminals, radiator fan, mainboard, and display connection points.

3.2 Wiring Instructions

1. Connect Display Panel: Carefully connect the ribbon cables from the LCD display panel to the corresponding ports on the mainboard. Ensure correct orientation and secure connection.
2. Input Power Connection: Connect your DC input power source to the IN+ (positive) and IN- (negative) terminals on the mainboard. Observe polarity to prevent damage.
3. Output Load Connection: Connect your load device to the OUT+ (positive) and OUT- (negative) terminals on the mainboard.

3.3 Mounting Considerations

The module is designed for integration into custom projects. Refer to the installation opening size diagram for precise enclosure design.

Image 3.2: Schematic diagram illustrating the recommended installation opening size for the module's display panel.

3.4 Unboxing and Initial Setup Video

4. Operation

4.1 Control Panel Overview

Image 4.1: The control panel of the WZ5020L, highlighting the SW button, U/I button, Constant Current (CC) indicator, Output (ON) indicator, and Rotary Encoder with ON/OFF function.

4.2 Basic Operation

1. Power On/Off: Press the ON/OFF button (rotary encoder) to toggle the output power. The 'ON' indicator light will illuminate when the output is active.
2. Adjusting Output Voltage/Current:
   • Press the U/I button to switch between voltage (V) and current (A) adjustment modes.
   • Rotate the Rotary Encoder to change the desired voltage or current value.
   • Press the Rotary Encoder to select a specific digit for finer adjustment.
   • Press and hold the Rotary Encoder to save the current settings.
3. Display Modes: Press the SW button to cycle through various display parameters on the LCD, such as input voltage, output voltage, output current, output power, output capacity, and output time.

4.3 Display Interfaces

Image 4.2: Various display interfaces of the WZ5020L module, including normal operation, voltage/current setting, parameter configuration, and protection status indicators.

4.4 Function Demonstration Video

5. Maintenance

To ensure optimal performance and longevity of your WZ5020L module, follow these general maintenance guidelines:

• Keep the module clean and free from dust and debris. Use a soft, dry cloth for cleaning.
• Ensure adequate ventilation around the module, especially when operating under high loads, to prevent overheating.
• Avoid exposing the module to moisture, extreme temperatures, or corrosive environments.
• Regularly check all wiring connections to ensure they are secure.

6. Troubleshooting

The WZ5020L module includes several protection mechanisms. If the module's output automatically turns off, it indicates that one of these protections has been triggered.

6.1 Protection Codes

When a protection mechanism is triggered, the LCD screen will display a corresponding protection code:

• LUP: Input Under-Voltage Protection (default 5.8V, adjustable 5.8-50V)
• OUP: Output Over-Voltage Protection (default 51V, adjustable 0-51.00V)
• OCP: Output Over-Current Protection (default 20.10A, adjustable 0-20.00A)
• OHP: Timeout Protection (default off, adjustable 0-100h)
• OAP: Over-Capacity Protection (default off, adjustable 0-999.9Ah)

6.2 Resolving Protection Triggers

1. Identify the Code: Note the protection code displayed on the LCD.
2. Exit Protection: Press any button on the control panel to exit the protection interface.
3. Address the Cause:
   • For LUP, ensure your input voltage is within the acceptable range and above the set threshold.
   • For OUP, OCP, OHP, or OAP, check your load and output settings. Reduce the load, adjust the output voltage/current, or increase the protection thresholds if appropriate for your application.
4. Reset and Resume: After addressing the cause, you can re-enable the output.

7. Specifications

Detailed technical specifications for the EC Buying WZ5020L module:

Image 7.1: Comprehensive table detailing the product parameters and specifications of the WZ5020L module.

8. Warranty and Support

For warranty information or technical support regarding your EC Buying WZ5020L CNC Buck Adjustable Power Supply Module, please contact EC Buying customer service directly through their official channels or the retailer where the product was purchased. Please retain your proof of purchase for any warranty claims.