You need a power supply close to each other, providing a good common ground of all power (in one place as close to the power supply), that there is no loop current, which can result in large differences between the segments of the system voltage transients, or on other faults .
Unahitaji ugavi wa madaraka karibu na kila mmoja, kutoa manufaa ya ardhi ya nguvu zote (katika sehemu moja kama karibu na usambazaji wa nguvu), kwamba hakuna sasa kitanzi, ambayo inaweza kusababisha tofauti kubwa kati ya makundi ya transients voltage mfumo, au juu ya makosa mengine .