Yes and no, it is possible and older units without controller included an attachment for a cable. The newer units include a basic controller with no external output. It is possible to replace the controller with 7090.500 but it is not standard as the engineering assumption was the speed will be set and left alone and any connection is primarily a toy with no real purpose.
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Roger Vitko
Tunze USA
"He's for every one of us, stands for every one of us, he'll save every man, woman and child in a mighty Flash!"
Current Tank Info: 210 gallon planted tank with Altum Angelfish
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