How to use DM-W3002 W3002 DC temperature control

How to use DM-W3002 W3002 DC temperature control

The W3002 is a versatile temperature controller suitable for various heating and cooling applications. In this tutorial, we will explore how to set up and use this device to control a DC load based on temperature readings. You will learn how to configure the start and stop temperatures, adjust tolerance settings, and implement a time delay for operation.

Throughout this guide, we will refer to specific identifiers such as p0 for the start temperature and p1 for the stop temperature. If you want to see the practical demonstration of these settings, be sure to check out the video for visual guidance (in video at 00:00).

Hardware Explained

The main component of this project is the W3002 temperature controller. This device uses an NTC temperature sensor to measure ambient temperature and has a relay output to control the connected load, such as a heater or fan. The relay allows the device to switch the power on and off based on the temperature readings.

In addition to the temperature sensor, the W3002 features buttons for setting the desired temperature thresholds and a display to show the current temperature and settings. The controller can be powered by a 12V or 24V DC supply, depending on the version you have.

Datasheet Details

Manufacturer	DM
Part number	W3002
Logic/IO voltage	12 V / 24 V
Supply voltage	12 V / 24 V
Output current (per channel)	10 A max
Peak current (per channel)	10 A max
PWM frequency guidance	N/A
Input logic thresholds	N/A
Voltage drop / R_DS(on) / saturation	N/A
Thermal limits	70 °C max
Package	Module
Notes / variants	Available in 12V, 24V, and 220V versions

Ensure proper voltage matching (12V or 24V) with the power supply.
Use a relay that can handle the load current without overheating.
Set the start (p0) and stop (p1) temperatures accurately.
Adjust the tolerance setting (p2) for accurate temperature readings.
Implement a time delay (p3) if needed for smoother operation.
Be cautious with wiring to avoid shorts and ensure secure connections.
Test the setup with a multimeter to verify voltage and current levels.
Monitor the device during initial tests to prevent overheating.
Ensure the temperature sensor is placed appropriately for accurate readings.

Wiring Instructions

To wire the W3002 temperature controller, start by connecting the power supply. Connect the positive terminal of your 12V or 24V power supply to the positive input of the controller, usually marked as +. Next, connect the negative terminal of the power supply to the negative input, marked as -.

For the load, connect the output terminals of the controller to your device. The positive output should connect to the positive terminal of the load, and the negative output should connect to the negative terminal. If you are using a relay, ensure it is correctly wired to handle the load. Also, connect the NTC temperature sensor to the designated input on the controller, ensuring it is placed where it can accurately measure the temperature you want to control.

Demonstration / What to Expect

When properly set up, the DM-W3002 will maintain the temperature within the defined range. For instance, if you set p0 to 65°C and p1 to 50°C, the device will activate the load (cooler or heater) when the temperature exceeds 65°C and will turn it off when it drops below 50°C. Expect to see the relay click on and off as the temperature fluctuates.

During the demonstration, be aware of common pitfalls such as reversed polarity or incorrect wiring, which can cause the device to malfunction. It is also essential to monitor the temperature sensor's placement to ensure accurate readings (in video at 10:30).