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en | Product Description
Automatic Detectors LSN improved
2019.11 | 4.0 | F.01U.025.877
Operation Guide
Bosch Sicherheitssysteme GmbH
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Product Description
Figure
1.1: 520 Series Fire Detector
The 520 Series Fire Detectors combine the advantages of the LSN improved technology with
the aesthetic benefits of flush-mounted installation and the option to choose the color. The
detectors can be connected to any LSNi fire panel. They can also be connected to all classic
LSN fire panels.
The detectors with associated trim ring are available in the versions white and transparent
with color toning inserts. Through the use of the supplied color toning inserts, optimum
adjustment to many different environments becomes possible.
The lack of an optical labyrinth and their easily-cleaned smooth surface means the detectors
are also suitable for applications in high-dust areas.
The low profile, flush-mounted design allows the use the detectors even in areas that must be
free of protrusions.
Thanks to the geometric arrangement of two separate optical sensor systems, the detectors
are not sensitive to interference, such as that caused by insects. The scattered light volume
that is evaluated by the sensors is located in the free space a few centimeters below the
ceiling.
The contamination level is measured constantly. Contamination of the detector surface leads
to an active adjustment of the threshold (drift compensation) and a fault indication at the
panel in the case of heavier contamination.
The detector is available as a scattered light fire detector only or as a multisensor detector
with an additional gas sensor.
The combination of scattered light detector and gas sensor allows the evaluation of signals
with the help of modern signal processing methods. The result is high immunity against
deceptive alarms and extended application possibilities in environments that are not suitable
for pure scattered light smoke detectors.
The integrated rotary switches allow for an automatic or manual allocation of addresses.
The FAP‑520 Detectors can be connected directly to the Local SecurityNetwork LSN.
Accessories
The 520 Series Detectors are generally mounted flush with the ceiling in false ceilings. The
detector and base are installed in a robust ceiling mount back box. In addition, a housing for
mounting within concrete ceilings can be used.
