Block detection question


I have a question.  I am trying to set up block detection.  I will be using NCE's DB20 detectors.  I want 3 detection zones, all will be powered by the same booster.


Can I isolate the positive rail and leave the common rail intact or do I need to break both rails.  .



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Breaking just one rail would really be much easier for my setup.  Again, not creating booster districts, just detection districts, all powered from the same booster.


(I hope the crude drawing I tried to make comes out correctly)

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