question about bus lines and reverse loop.....

trainman2435 <trainman2435@...>

hello everyone, i was reading allans site and i noticed he says (Do
not connect your main bus to your reversing section in any way. Your
reversing section must only be connected to your reverse section
controller, reversing relay, or reversing switch.) what exactly does
this mean? how can i hook up my reverse loop to my MRC AD520 without
attaching anything to my main bus? im really confused, can someone
explain this to me please? thanks!

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