bellagio Digital Entry System
PD
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281 Issue 1
Installation and Operating Manual
Page 37 of 52
DBA-8Z 8 Way Zone isolator
The DBA-
8Z Isolator is used to distribute wiring to a ‘zone’ of up to
8 flats whilst providing
isolation from other zones. This isolation ensures that a cable fault within one zone will not
affect the operation of phones within any other zone. It offers a good compromise between
equipment cost and ease of maintenance. If greater isolation is required please refer to the
DBA-4I Phone Isolator.
There is a maximum of 2 phones in each flat. Adding a 2
nd
phone / extension phone
reduces the maximum number of flats that can be powered from the same Power supply.
Isolator PCB’s are normally supplied in an individual ABS plastic enclosure, but can be
supplied in multiples in a lockable IP55 Steel cabinet (with or without power supplies). All
control equipment must be placed in a protected indoor environment.