Best update I made to my Apex with amazing control. I use the cable on 2 WP-40 pumps on my 120gal long tank. Not sure if more is needed by anyone, or if it explanatory enough on its own, but here is how I did it.
Yes, an Apex uses 0-10v on the VSP, this cable splits the voltage to 0-5v that is used by the WP's.
***Keep in mind that different venders have different color wires for the 3 pin waterproof connection, so if you do one yourself, but sure to test the pin outs on it before or you risk dropping 24v into your VSP.***
Any 2 resistors of the SAME value can be used. I used 2.7k Ohm 1/4 watt. I have read several people using 1k 0hm resistors. The watts rating tells you how much heat a resistor can handle safely without inviting a failure. There are no heat issues with these builds, plus the 1/4w resisters are typically smaller in size and are hidden easier
In the third pic, I actually ended up de-soldering the orange/white ethernet cable from the resistor and slid on some heat shrink, then re-soldered it and slid the sleeve over the open wires to avoid shorting it out against the ground wires. I can take more pictures again when I get parts in for more cables. Hopefully should be shortly, just went over my emails and I have enough to make 25 coming, and 21 are already spoken for.
***I also suggest getting a harness assembled without dismantling your current controller. 2 reasons mostly. One, IF something ever happens to your Apex, you will have no way of controlling your pumps until you get it fixed. Two, if you ever are looking to sell them, upgrade your tank etc, then they will be worthless without a controller.***
Quick schematic
I use the following for the pins on the ethernet cable. Info is in the Apex guide as well though.
My first cable, this is the orange and orange/white ethernet cable wires as noted above, controlled by the V2 or V4 depending which port you are plugged into. Do not mind the bad soldering, I have gotten 100x better and quicker now that I have made a half dozen double cables and waiting on parts for more.
Complete with heat shrink. White marks which power connection controls which pump. Just handy so you know which one is plugged in where if you are using the EB8 as well.
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