Main Functionality - Bosch PRAESENSA Installation Manual

Loudspeaker line isolator system
FIM (Fault Isolator Module) with ordering number PRA-LIM - installed in the field, on the
loudspeaker line. FIM functions as the isolator in case of a short-circuit. Responsible for
monitoring and reporting faults locally (for local line segments connected to the FIM):
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3.2

Main functionality

Architecture of the loudspeaker line isolator system allows you to create loudspeaker line in
closed‑loop topology with extra side‑spurs, called T‑Branches. The loop as well as every single
T‑Branch are constantly monitored and searched for any abnormalities in the load and cabling.
Figure 3.1: Loudspeaker loop monitored by the loudspeaker line isolator
The loudspeaker line isolator system catches multiple faults independently for different
loudspeaker lines. It handles also multiple faults at the same time for the same loudspeaker
line, regardless the type of the fault.
Bosch Security Systems B.V.
Loop short (only adjacent segments)
T‑branch short
T‑branch open
Installation manual
System introduction | en
2021.07.28 | V1.00 |
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