Please Help with Jebao SW-4 with Apex 0-10v input

Ecotech Marine

Shanel

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I'm building a Biocube 32 for my Daughter and Grandson. I am trying to use 2 apex 0-10v outputs to control 2 Jebao SW-4's. No such luck. It seems like when I output voltage the pumps change speed but when I remove the voltage the pumps don't shut off. It's like they revert back to the Jebao controller settings. The instructions are terrible and do not include the setup of the o-10v input. I need some help setting this up. Hopefully it's something simple.
 
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Shanel

Shanel

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Here is a pic of the Jebao controller
20210728_185608.jpg
 
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Shanel

Shanel

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If I put it into Feed Mode it work perfect. Tried to keep the Feed button depressed. Even with the button depressed it still times out. Anybody know a way of keeping it in Feed Mode?
 
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Shanel

Shanel

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Here is my fix for the SW-4. First I just have to say how I can't stand when company's advertise features that don't work as advertised. This pump controller does not have a headphone jack for 0-10v input. The 0-10v input does not have full control of the pump. Don't take this the wrong way, I still like the Jebao pumps. This is a 24v dc pump. There is a constant 24v dc output to the pump. The va circuit controls the speed of the pump using a 0-5v signal. After testing the va circuit of the pump, the output voltage on the va circuit works like this. The controller steps down the input voltage by 1/2, so 10v input would be 5v output. The controller outputs the higher of the 2 voltages to the va circuit. If the input voltage is 0v and the SW controller mode is signaling higher than 0v. That voltage would be sent to the pump via the va circuit. For example if you send a 0v signal to the SW controller, no matter what mode the SW controller is in it will output the voltage that the SW controller mode is signaling and the pumps stay running. I did some testing and found if you disconnect the 24v power to the SW controller and leave the 0-10v input connected, the va circuit still outputs the signal from the 0-10v input by 1/2 (10v = 5v). Looking at the circuit board where the 24v positive circuit goes from the power connector to the first diode, there is a small copper section. You can use a razor blade to scrape this circuit off and you will disconnect the power to the SW controller modes. You will still have the 24v going to the pump. Now you have full control of the pump via the 0-10v circuit. Below is how I modified the SW controller to work both ways, with or without the 0-10v input.

20210730_235947.jpg


Here is the copper section to remove.

20210731_000341.jpg


Here is the copper section removed.

20210731_001320.jpg


If you want to switch between 0-10v full control and the Jebao factory modes. Install an on/off switch here.

20210730_235452.jpg


Next you will need to make a cutout for the switch. Position of the cutout will be your choice.

20210730_235430.jpg


Drill your hole for the headphone jack they advertise is there, LOL. If you have the correct connector you can skip this step. Unfortunately I already purchased the cable before finding out they LIED, LOL.

20210730_235410.jpg


Cut any tabs that will interfere with you switch.

20210731_001946.jpg


Install and solder your headphone jack if applicable.

20210731_002035.jpg


Install your switch.

20210731_002733.jpg

20210731_002656.jpg

20210731_002549.jpg


Reassemble your controller. Now you have full control. Apex can even do the feed modes for you.
 
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