Hi, I just want to ask for a help, what specifically type of 2 channel relay module that is shown in this diagram, which is connected to 24V supply

There are many different relays that could be suitable for your application. Before I make a suggestion, could you provide more details about what this relay will be used for and the environment it will operate in?

I moved your topic to an appropriate forum category @029lrnc_gtchln .

In the future, please take some time to pick the forum category that best suits the subject of your topic. There is an "About the _____ category" topic at the top of each category that explains its purpose.

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Well, This relay module will be used to create control mechanism for water pressure pump to turn and off automatically based on the value of ultrasonic sensor (For Water level). The pressure pump and solenoid valve will simultaneously open when the level reached its desired value.

The water pressure pump operates within 24V, which is the team used 24V power supply to meet the voltage needed for water pressure pump. Now, we wonder what type of 2 relay module are we going to use to operate that effectively

What is the pump motor's current rating?

I bought boon tech 24VDC 2-way channel. Is it suitable

Why buy something and then ask if it's suitable? Do you not think it would be better the other way around?

Post a link to the specs of what you bought and the forum can check if it's suitable.

That said, the way the pump is connected to the relays makes little sense to me. It seems significantly over-complicated to control the pump. Can you help us understand why?

If your relay is 24VDC, you need to connect JdVcc to 24V. And GND to GND.
Make sure you don't connect your arduino to the Vcc pin next to JdVcc!

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On the diagram, it says connect, that's why i am confusing if i will use 5v relay 2 channel module instead of that boon tech. . And can you help me what does the warning mean in 2 channel relay module in the diagram

If you have 5V relay and 5V arduino, you can place the jumper there to connect Vcc to JdVcc.
In case of 24V, jumper has to be removed and Vcc pin next to JdVcc must be NOT connected. Otherwise you give 24V to arduino.