DONGKER DC-DC 22A 2000W CVCC Adjustable Voltage Module User Manual

1. Introduction

This manual provides detailed instructions for the DONGKER DC-DC 22A 2000W CVCC Adjustable Voltage Module. This high-power, non-isolated converter is designed for stable output power supply, supporting MPPT solar charging, and can function as a buck power supply, battery/solar charger, or LED constant current driver. It features a large LCD display for monitoring and programmable parameters for precise control.

2. Safety Information

• This module is a DC power module. Do not connect it to AC power sources.
• The module is a step-down power supply. The output voltage must always be less than the input voltage. The maximum output voltage is approximately 94.5% of the input voltage (e.g., 47.25V for a 50V input).
• Ensure the input power is greater than the load power to prevent damage or malfunction.
• If the module becomes hot during operation, reduce the output power to prevent overheating.
• When using as a charger, connect the input power before connecting the battery. Ensure the output voltage is set higher than the battery voltage.
• This product does not have reverse connection protection. Reversing the positive and negative terminals of the battery will damage the device.
• Non-professionals should not attempt to charge batteries directly without proper knowledge and safety measures to prevent fire and explosion hazards.
• Always read this manual and product descriptions thoroughly before use.

3. Product Overview

The DONGKER DC-DC module offers robust performance and versatile functionality. Key features include:

• High Power Output: Up to 2000W / 22A.
• Wide Input Voltage Range: DC 12V-140V.
• Adjustable Output Voltage: DC 0V-125V.
• Constant Voltage (CV) and Constant Current (CC) Modes: For stable and protected power delivery.
• MPPT Solar Charging Support: Efficient power conversion from solar panels.
• Large LCD Display: Shows multiple parameters simultaneously (voltage, current, power, time, energy, capacity, input voltage, work status).
• Programmable Functions: Set output voltage/current, work time, and default output state after power on.
• Communication: RS485 MODBUS control.
• Protection Modes: 10 working protection modes for enhanced safety.
• Memory Function: Power-down memory and saving work mode.
• Cooling: Automatic control cooling fan.

3.1 Component Identification

Refer to the diagrams below for component identification and connection points.

Figure 1: DONGKER DC-DC Module Component Layout. This image illustrates the various parts of the module, including input (IN+) and output (OUT-) terminals, power switch, MPPT hardware switch, 10K NTC 3950B external temperature sensor interface, and serial communication ports. It also highlights optional connections for WiFi, infrared remote control, and wireless remote control modules (purchased separately).

Figure 2: Module and LCD Controller Detailed View. This diagram labels the input DC 12V-140V (Vin+, Vin-), output DC 0V-125V (Vout+, Vout-), power switch, cooling fan, aluminum heat sink, and the LCD controller with its buttons (V-SET, SW, I-SET, ON/OFF) and display indicators (ON/OFF, CV, output voltage, current, power, capacity, time).

4. Specifications

Figure 3: Module and LCD Controller Dimensions. This image provides approximate measurements for both the main power module and the separate LCD control panel.

5. Setup and Installation

5.1 Initial Connections

1. Input Power Connection: Connect your DC power source to the VIN+ (positive input) and VIN- (negative input) terminals on the module. Ensure the input voltage is within the specified range of 12V-140V DC.
2. LCD Controller Connection: If using the LCD controller, connect it to the UART interface on the main module.
3. Load Connection (Initial Setup): Do not connect your load yet. This allows for safe parameter configuration.

5.2 Output Current Adjustment (Module Only)

For modules without the LCD controller, the output current is adjusted using DIP switches and a potentiometer. Refer to the diagram below for specific settings.

Figure 4: Independent Motherboard Output Current Settings. This image details how to set the output current using the DIP switches on the module. Each combination corresponds to a specific current value from 0.5A to 25A. A note indicates that modules without an LCD controller use a toggle switch and potentiometer for adjustment.

Figure 5: Module Bottom View. This image shows the underside of the module, highlighting the DIP switches for current adjustment and the input/output terminals (IN+, IN-, OUT+, OUT-).

6. Operating Instructions

6.1 Basic Operation Steps

1. Connect Input Power: Ensure the correct DC work voltage is connected to VIN+ and VIN-.
2. Set Output Voltage and Constant Current: Use the LCD controller (V-SET and I-SET buttons, and rotary encoder) to set the desired output voltage and the constant current limit.
3. Configure Other Parameters: Set any other required parameters such as work time, output energy limits, or default power-on state.
4. Disconnect Power: Turn off the input power supply to the module.
5. Connect Load: Connect your intended load to the output terminals (Vout+ and Vout-).
6. Re-power On: Turn the input power supply back on to begin operation.

6.2 LCD Controller Functions

The LCD controller provides an intuitive interface for monitoring and adjusting parameters.

• V-SET Button: Short press to set voltage. Long press to enter/exit data set.
• SW Button: Short press to switch IN/OUT/MOVE bit. Long press to enter/exit set mode.
• I-SET Button: Short press to set current. Long press to enter/exit data set.
• Rotary Encoder: Short press to switch parameter. Long press to lock function. Rotate to change value.
• ON/OFF Button: Short press to turn output ON/OFF. Long press to clear output data.

6.3 MPPT Solar Charging

The module supports MPPT (Maximum Power Point Tracking) for efficient solar charging.

Figure 6: MPPT Solar Charging Setup. This image shows the module connected to a solar panel and a battery, with an external temperature probe for over-temperature protection. The LCD display indicates 'MPPT ON' when active, and a battery icon appears when a battery is connected. It also reiterates the warning about the lack of reverse connection protection.

• MPPT Activation: Ensure the MPPT switch on the module is enabled. An indicator light will illuminate upon MPPT activation.
• External Temperature Probe: Connect an external NTC temperature probe to the designated interface for over-temperature protection. The module will automatically stop charging if an over-temperature condition is detected.
• Battery Connection: When charging a battery, connect the input power first, then the battery. Ensure the module's output voltage is set higher than the battery voltage.

7. Maintenance

• Keep the module clean and free from dust and debris. Use a soft, dry cloth for cleaning.
• Ensure adequate ventilation around the module, especially for the cooling fan, to prevent overheating.
• Regularly check all connections for tightness and signs of wear or corrosion.
• Store the module in a dry, cool environment when not in use.

8. Troubleshooting

9. Warranty and Support

For warranty information or technical support, please contact DONGKER customer service through the retailer where the product was purchased. Provide your model number (616729) and purchase details for faster assistance.

You can visit the DONGKER Store for additional product information and support resources: DONGKER Store on Amazon