Tunze 7074.11 - Valve Set

[smithpl]

Hi,

anyone can send me info what is on pins in plug of this device which is used to connect controler PH?
Or anyone have pics from inside?

I have 7070/2 and I would like to do DIY ext. 774.11

thanks
M.

 

[smithpl]

up, someone have 7074/2 ?