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How to Deal With Reverse Loop in DCC?
Dealing with the problem of reverse loops in DCC systems is much more straightforward and easy as compared to traditional DC systems.
In DC systems, an additional switch is needed to manually operate the reverse loop, while in DCC layout the entire mechanism is automated. The layout just requires the addition of a reversing module in the system and it will automatically detect the reverse loop and switch the power between the tracks.
So, you just need to get a reversing module that is compatible with the power requirement of your layout and the job is done!
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To clarify, the entire system is not automated, only the electrical circuit switching is handled by the reverse loop module. The turnout at the loop exit needs switching either by hand or automatic sensor. The latter method depends on the type of turnout motor chosen.
DCC Concepts (and others) have a magic black (or Blue) box that solves this problem for you with two wires.