Well just to clear up my wiring for you; On the RJ45 (for V1) pin 5 is the ground which matches up with pin 2 on the male DIN jack. Pin 6 on the RJ45 is the signal wire which matches up with pin 3 on the male DIN jack.
Have you put your hand in the tank to feel the flow? I know after I fixed the bad wiring on the female DIN on the Tunze, I thought it still wasn't working, until I placed my hand in front of the pump and realized that it was.
I get off here in about ten minuets, so I should be able to get pics up in the next 30-40 minuets.
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Here they are, sorry for the bad quality.
Here is the wiring on the male DIN jack, the red wire is the ground on pin 2 and the black is the signal on pin 3
<a href="http://s1228.photobucket.com/albums/ee457/metalman1221/?action=view¤t=DIN1.jpg" target="_blank"><img src="http://i1228.photobucket.com/albums/ee457/metalman1221/DIN1.jpg" border="0" alt="Photobucket"></a>
And here is the wiring on the Tunze female DIN jack. The grey wire on the left is on pin 4 which I assume is the 8v supply for the Tunze controller. The yellow wire in the middle is the ground on pin 2. Finally the brown wire on the right is the 0-10v signal wire on pin 3.
<a href="http://s1228.photobucket.com/albums/ee457/metalman1221/?action=view¤t=DIN2.jpg" target="_blank"><img src="http://i1228.photobucket.com/albums/ee457/metalman1221/DIN2.jpg" border="0" alt="Photobucket"></a>
This is on a 6055, so I don't know it it will be the same for all controllable Tunze pumps. However, it would be nice to see some pictures of other models in order to differentiate the wiring among various pumps.