Pin locations / functions on Tunze powerhead

[rkelman]

I'm looking for the pin layouts for my tunze powerheads. I'd like to make a cable for my Apex to control the powerheads instead of the Tunze controller.

 

[rvitko]

The only info I have is that it is an 8V signal and 3 pins are used. I believe Neptune offers a cable and that would be your best bet.