Changes
added information that for the 12V line of CPC6128 and 664 0V and 12V of outer and inner contacts are exactly the opposite of the 5V line.
The plug has one outer and one inner contact. The outer contact is 0V, and the inner contact is 5V.
For the 12V of the CPC 664 and 6128 it is the other way around, the outer contact is 12V, and the inner contact is 0V.
[[Category:Hardware]]
