ZK-10022 DC Adjustable Regulated Power Supply User Manual

1. Introduction

The ZK-10022 is a third-generation upgraded CNC DC stabilized power supply module designed for constant voltage and constant current applications. It features a wide input voltage range, high output current and power capabilities, and an intuitive LCD display for precise control. This module supports serial communication, standard MODBUS protocol, and can be extended with a serial port screen for enhanced functionality. Its robust design includes a PCB sinking gold process for improved conductivity and reliability, and durable silicone buttons for long-term use.

Figure 1: ZK-10022 DC Adjustable Regulated Power Supply Module

2. Safety Warnings and Precautions

• DO NOT input AC power. This module is designed for DC input only. Connecting to 220V mains power will cause severe damage.
• The maximum allowable input voltage is 140V. Exceeding this voltage or reversing the positive and negative input poles will damage the module.
• The output cannot be fully guaranteed to prevent backflow. When connecting to a battery, ensure the output voltage of the power module is always higher than the battery voltage. Alternatively, connect a diode in series with the positive output terminal to ensure one-way conduction and prevent battery voltage backflow, which could burn out the power supply.
• When connecting the output terminal, be careful not to reverse the positive and negative poles.
• This product is a step-down module. The maximum output voltage is approximately (input voltage * 0.95) - 1V. Ensure your input voltage is sufficient for your desired output.

3. Package Contents

Depending on the package purchased, your product may include:

• Package A: Step-down module (main board) x1, LCD meter (display unit) x1, Connecting cable x1
• Package B: Step-down module (main board) x1
• Package C: Bluetooth communication module (ZK-BT) x1

Figure 2: Example of product packaging

4. Product Overview

4.1 Main Board Components

Figure 3: Main Board and Display Unit Function Diagram

• IN: Input terminals (12-140V DC)
• OUT: Output terminals (0-125V DC)
• CC Constant Current Indicator Light: Illuminates when operating in constant current mode.
• CC Current Regulation Potentiometer: Used to adjust the constant current limit (soldering required if purchasing motherboard separately).
• CV Constant Voltage Indicator Light: Illuminates when operating in constant voltage mode.
• CV Voltage Regulation Potentiometer: Used to adjust the constant voltage output (soldering required if purchasing motherboard separately).
• XH1.25 Socket Communication Port: Reserved for communication with BT module, USB to TTL module, or serial screen.

4.2 Display Unit Features

Figure 4: Display Unit Highlights

• 1.8-inch Large Screen: Provides clear visualization of parameters (36*29mm viewing range).
• Integrated Knob: Features increased damping for better tactile feedback and precise adjustments.
• Silicon Rubber Keypads: Soft, comfortable, durable, waterproof, and dustproof for long-term reliability.

4.3 Key Functions of Display Unit

Figure 5: Key Functions of the Display Unit

• M/↑ Button: Short press to switch between input voltage and output voltage display. Long press to enter/exit the settings menu.
• V-SET Button: Short press to enter voltage setting interface.
• I-SET Button: Short press to enter current setting interface.
• OK/↓ Button: Short press to switch output power/capacity/energy/time/temperature display. Long press for sleep shutdown.
• Rotary Encoder: Short press for selection bit (setting menu interface). Long press to open/unlock function. Rotate left for number reduction, rotate right for number increase.
• Power Button (Green): Short press to turn on/off output. Long press for sleep shutdown.

5. Specifications

Figure 6: Detailed Product Parameters

5.1 Dimensions

Figure 7: Product Dimensions and Suggested Opening Size for Display Unit

6. Setup Instructions

6.1 Connecting the Display Unit

If you purchased Package A, the display unit comes pre-connected to the main board via a ribbon cable. Ensure the connection is secure.

6.2 Independent Motherboard Use (Package B)

Figure 8: Independent Motherboard Use and Analog Control

If using the ZK10022B motherboard independently without the digital display, you will need to solder the voltage and current adjustment potentiometers (CV and CC) to the designated points. Additionally, a jumper cap must be plugged into the communication port for analog potentiometer control. If using a serial screen, APP, or upper computer control, the jumper cap must be unplugged and the module powered on again after connection.

6.3 Power Connection

1. Connect your DC input power source (12-140V) to the 'IN' terminals on the main board. Observe correct polarity (+ to + and - to -).
2. Connect your load to the 'OUT' terminals. Ensure correct polarity.
3. Double-check all connections before applying power.

7. Operating Instructions

7.1 Basic Operation

Figure 9: Setting Voltage, Current, and Display Switching

1. Power On: After connecting the power, the display will show the current output status.
2. Setting Voltage: Press the V-SET button to enter the voltage setting interface. A digit will flash. Rotate the encoder to adjust the value. Press the encoder to select the next digit. Press V-SET again to exit.
3. Setting Current: Press the I-SET button to enter the current setting interface. A digit will flash. Rotate the encoder to adjust the value. Press the encoder to select the next digit. Press I-SET again to exit.
4. Switching Input/Output Voltage Display: Short press the M/↑ button to toggle between displaying input voltage and output voltage.
5. Switching Output Data Display: Short press the OK/↓ button to cycle through output power (W), capacity (Ah), energy (Wh), time (h), and temperature (°C) displays.
6. Turning Output On/Off: Short press the green power button to enable or disable the output.

7.2 Locking Function

Figure 10: Locking Function

• On the normal display interface, long press and hold the rotary encoder for 2 seconds to lock the set voltage and current to prevent accidental operation.
• After locking, press and hold the encoder for 2 seconds to unlock.
• Even when locked, the power button can still operate normally, allowing the power to be disconnected at any time.

7.3 System Parameter Settings

Figure 11: System Parameter Values

Press and hold the M/↑ button for 2 seconds to enter the settings menu. The first interface is the OUT settings interface. Press V-SET to switch data group names (Cd00-Cd10), press I-SET to select the previous parameter, and press OK/↓ to select the next parameter.

• Add (Local Address): Set local address (001-255). Factory default is 001.
• LED (Backlight Brightness): Adjust backlight brightness (Level 0-5). Factory default is 5.
• SLP (Automatic Screen Shutdown Time): Set screen shutdown time (1-60 minutes). Factory default is off.
• BEEP (Buzzer): Turn on/off the buzzer.
• ZEro (Zeroing Low Current): Calibrate the current zero point. Do not connect to a load when calibrating.
• Frd (Restore Factory Settings): Restore all settings to factory defaults.
• CALU (Corrected Output Voltage): Calibrate output voltage.
• CALI (Corrected Output Current): Calibrate output current.

7.4 Protection Mechanisms

Figure 12: Protection Settings Interface

The module includes several protection features to ensure safe operation. These can be configured in the settings menu:

8. APP and PC Connectivity

8.1 APP Online Method (with ZK-BT Module)

Figure 13: Connecting via Bluetooth Module to APP

1. Insert the ZK-BT Bluetooth module (Package C) into the communication interface of the power motherboard. The ZK-BT indicator light will flash once upon insertion.
2. Open the Wuzhi Zhilian APP on your mobile device. Click "Add Device" on the APP interface. The APP will automatically search for "Wuzhi Power".
3. After successful connection, click "Complete".
4. Click on the device icon to enter the normal operation interface. Long press the product icon to change the name or delete the device.

8.2 Upper Computer (PC) Online Method (with ZK-U2T Module)

Figure 14: Connecting via USB to TTL Module to PC

1. Insert a data cable into your computer and connect it to the ZK-U2T (USB to TTL module, Package C). The ZK-U2T module has a 4P cable that needs to be inserted into the communication port of the power motherboard.
2. Find the corresponding COM port number for "USB-Serial CH340" in your computer's Device Manager (under Ports).
3. Open the "Wuzhi Zhilian" upper computer software. Select the corresponding COM port number and click the "Connect" button in the bottom left corner to automatically connect.
4. If the operating environment is .NET Framework 4.8 and the software does not run, you may need to download and install .NET Framework 4.8 from the official Microsoft website.

9. Maintenance

9.1 General Care

• 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 at high power, to allow the cooling fan to function effectively.
• Avoid exposing the module to moisture or extreme temperatures.

9.2 PCB Sinking Gold Process

Figure 15: Benefits of PCB Sinking Gold Process

The PCB utilizes a sinking gold process to:

• Prevent missing segments in the LCD after long-term use.
• Protect circuit board pads from oxidation.
• Improve PCB conductivity.
• Reduce line impedance and contact resistance.

This process enhances the longevity and reliability of the module, requiring no special maintenance related to the PCB finish.

10. Troubleshooting

10.1 Calibration (CALU / CALI)

Figure 16: CALU (Voltage) and CALI (Current) Settings

If the output voltage or current is not accurate, it can be calibrated:

Output Current Calibration (CAL-I):

1. Short press the power button. The first line displays "step 01", the second line displays a flashing current number. Short press the rotary encoder to shift between digits.
2. Use a multimeter or electronic load to short circuit the output terminals and measure the actual current. Input this actual current value into the second line using the encoder.
3. Short press the power button. The first line displays "step 02".
4. Use a multimeter to measure the actual output current again and input it to the second row.
5. Short press the power button to complete the calibration. If successful, the second line displays "SUC"; otherwise, it displays "Err". If it fails, try calibrating again.

Output Voltage Calibration (CAL-U):

1. Short press the power button. The second line displays "step 01", the first line displays voltage with flashing numbers. Short press the rotary encoder to shift between digits.
2. Use a multimeter to measure the actual voltage at the current output terminal (output terminal unloaded). Input this actual voltage value into the first row using the encoder.
3. Short press the power button. The second line displays "step 02".
4. Use a multimeter to measure the actual output voltage again and input it to the first row.
5. Short press the power button to complete the calibration. If successful, the second line displays "SUC"; otherwise, it displays "Err". If it fails, try calibrating again.

10.2 Protection Triggered

If the output unexpectedly turns off, check the display for protection indicators (e.g., LUP, OUP, OCP, OPP, OTP, OHP, OAH, OPH). Refer to Section 7.4 for details on each protection mechanism and its default/adjustable values. Adjust settings or resolve the underlying issue (e.g., reduce load, increase input voltage) to clear the protection state.

10.3 Screen Issues

• Screen not turning on: Check power connections. Ensure the SLP (Automatic Screen Shutdown Time) setting is not set too short or is disabled if you expect the screen to remain on.
• Missing segments on LCD: While the sinking gold process helps prevent this, if it occurs, ensure connections are secure. If persistent, contact support.

11. User Tips

• For precise control, utilize the fine adjustment capabilities of the rotary encoder when setting voltage and current.
• Regularly check the module's temperature, especially during high-power operation, to ensure the cooling fan is active and preventing overheating.
• When using the APP or PC software, ensure your communication module (ZK-BT or ZK-U2T) is correctly installed and recognized by the respective software.
• Always perform a quick check of your set voltage and current before connecting sensitive loads.

12. Warranty and Support

This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For specific warranty terms and conditions, please refer to the documentation provided at the time of purchase or contact your retailer. For technical support, troubleshooting assistance, or inquiries about replacement parts, please contact the seller or manufacturer directly.