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20
en | Planning
4.3
Installation options
Create an installation plan, by using one of the following installation options. Each option is
described separately; however, the installation options can be combined:
Installation option 1: One Isolator Board for each loudspeaker
This option ensures that a single line fault does not affect any of the loudspeakers. An Isolator
Board or loudspeaker fault does not affect other loudspeakers. Some installations demand
this. A maximum of 50 speakers can be connected in one loop. See Installation option 1: One
Isolator Board for each loudspeaker, page 21.
Installation option 2: Branch of loudspeakers connected to an Isolator Board
This option ensures that a fault will only lead to the loss of the loudspeakers on a tap-off and
is a cost-effective way to connect more than 50 loudspeakers in a loop with some topology
benefits. With this option, tap-off is monitored for short circuit and overload, plus the loop/
tap-off can be monitored for open circuits. See Installation option 2: Branch of loudspeakers
connected to an Isolator Board, page 23.
Notice!
When using the 100 watt permissible load setting of the Isolator Board in combination with
the DC Blocking Board, an overload on the tap-off of the DC Blocking Board will not lead to a
fault indication in the system. If fault indication is required, use at least a 22 µF blocking
capacitor instead of the DC Blocking Board.
Installation option 3: Loudspeakers connected between Isolator Boards
This option ensures that a fault will only lead to the loss of loudspeakers in one segment. It is
a cost-effective way to build a loop of more than 50 loudspeakers. The blocking board in the
segments protects the loop against overload on the tap-off of the DC Blocking Board. An
overload on the tap-off of the DC Blocking Board will not lead to a fault indication. See
Installation option 3: Loudspeakers connected between Isolator Boards, page 25.
2014.03 | V1.1 |
Installation and Operation Manual
Loudspeakers Line Isolator System
Bosch Security Systems B.V.
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