REES52 ZK-J5X 5A CNC Step-Down Module User Manual

Introduction

The REES52 ZK-J5X is a versatile DC adjustable constant voltage and constant current step-down power supply module. It features an integrated LCD display that provides real-time information on input voltage, output voltage, current, and power. This module is designed for applications requiring a stable and adjustable power source, functioning as a buck power supply, battery charger, or LED constant current driver.

Key features include high voltage resistant terminals, a protective acrylic shell, complete disability output support, anti-reverse protection, and short circuit protection.

Product Features

• Integrated LCD Display: High-definition display for input voltage, output voltage, current, and power.
• Adjustable Output: Stable and adjustable output voltage and current to meet various application demands.
• Versatile Applications: Can be used as a general buck power supply, battery charger, or LED constant current driver.
• Protection Features: Includes anti-reverse protection and short circuit protection for enhanced safety.
• Durable Construction: Equipped with high voltage resistant terminals and a protective acrylic shell.
• Enable Output Function: Supports complete disability output control.

Figure 1: Assembled REES52 ZK-J5X module with clear acrylic case.

Technical Specifications

Safety Information

Please read and understand all safety instructions before operating the module. Failure to follow these instructions may result in electric shock, fire, or serious injury.

• Ensure all connections are correct and secure before applying power.
• Do not exceed the maximum input voltage (36V DC) or output current (5A) ratings.
• Always observe proper polarity when connecting input and output power. The module includes anti-reverse protection, but incorrect wiring can still cause damage or malfunction.
• Avoid touching exposed components when the module is powered.
• Provide adequate ventilation, especially when operating at higher power outputs (above 50W or 3.5A), to prevent overheating. A cooling fan is recommended for 75W operation.
• Keep the module away from moisture, dust, and extreme temperatures.
• This module is intended for use by individuals with appropriate technical knowledge of electronics.

Setup and Installation

The ZK-J5X module typically comes with an acrylic case for protection. Follow these steps for assembly and initial setup:

1. Case Assembly (if required): If the module is not pre-assembled, carefully attach the acrylic panels using the provided standoffs and screws. Ensure the LCD display and control buttons align correctly with the case openings.


Figure 2: ZK-J5X module components before assembly.

2. Input Power Connection: Connect your DC power source (6.5V to 36V) to the input terminals labeled IN+ (positive) and IN- (negative). Ensure correct polarity.
3. Output Load Connection: Connect your load device to the output terminals labeled OUT+ (positive) and OUT- (negative).
4. Initial Power-Up: Apply power to the input. The LCD display should illuminate, showing the current input voltage and other parameters.

Note: The module is a step-down converter, meaning the output voltage will always be lower than the input voltage. A minimum voltage difference of 2V is required for proper operation.

Operating Instructions and Controls

The ZK-J5X module features an LCD display and several buttons and potentiometers for control. Refer to Figure 3 for component identification.

Figure 3: ZK-J5X module with labeled controls.

Control Buttons:

• ON/OFF Button: Toggles the output power on or off. When off, the display may still show input voltage, but no power is supplied to the output terminals.
• Switch Display Button: Cycles through different display modes on the LCD (e.g., Input Voltage, Output Voltage, Current, Power).
• Voltage Increase (+) Button: Increases the output voltage.
• Voltage Reduction (-) Button: Decreases the output voltage.

Potentiometers:

• ADJ-V (Voltage Adjustment Potentiometer): Fine-tunes the output voltage. Use in conjunction with the voltage increase/reduction buttons for precise setting.
• ADJ-I (Current Regulation Potentiometer): Sets the constant current limit. This is crucial when using the module as a battery charger or LED driver. Turn clockwise to increase the current limit, counter-clockwise to decrease.

Setting Output Voltage and Current:

1. Setting Voltage:
   • Power on the module.
   • Use the Voltage Increase (+) and Voltage Reduction (-) buttons to set the desired output voltage.
   • For fine adjustment, use the ADJ-V potentiometer.
2. Setting Current Limit (Constant Current Mode):
   • First, set the desired output voltage (e.g., for charging a 12V battery, set to 14.4V).
   • Connect a multimeter in series with the output (or a known resistive load) to measure the current.
   • Adjust the ADJ-I potentiometer to set the maximum desired output current. The "CC" indicator LED will illuminate when the module is operating in constant current mode.
   • Important: Always set the current limit with a load connected or a multimeter in current mode. Do not short the output to set current.

Display Modes:

Press the "Switch Display" button to cycle through the following information on the LCD:

• Input Voltage (IN V)
• Output Voltage (OUT V)
• Output Current (OUT A)
• Output Power (OUT W)
• Input Voltage & Output Current (alternating)
• Output Voltage & Output Current (alternating)
• Input Voltage & Output Power (alternating)
• Output Voltage & Output Power (alternating)

Figure 4: Examples of different display modes on the ZK-J5X LCD.

Maintenance

The REES52 ZK-J5X module is designed for reliable operation with minimal maintenance. Follow these guidelines to ensure its longevity:

• Cleaning: Keep the module clean and free from dust and debris. Use a soft, dry cloth to wipe the surfaces. Do not use liquid cleaners or solvents.
• Ventilation: Ensure proper airflow around the module, especially when operating at higher power levels. If using a fan for cooling, periodically check that the fan is clear of obstructions and functioning correctly.
• Connections: Periodically check all input and output connections to ensure they are secure and free from corrosion.
• Storage: When not in use, store the module in a dry, cool, and dust-free environment.

Troubleshooting

Warranty and Support

For warranty information and technical support, please refer to the retailer or manufacturer's official website where you purchased the REES52 ZK-J5X module. Keep your purchase receipt as proof of purchase.

Manufacturer: REES52
Country of Origin: China