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340 | LSN Peripherals | LSN Smoke
Chemical sensor (CO gas sensor)
The main function of the gas sensor is to detect carbon
monoxide (CO) generated as a result of a fire, but it will also
detect hydrogen (H) and nitrous monoxide (NO). The
sensor signal value is proportional to the concentration of
gas. The gas sensor delivers additional information to
effectively suppress deceptive values.
Depending on the service life of the gas sensor, the
FAP‑OTC 420 detector switches off the C sensors after five
years of operation. The detector will continue to function as
an OT detector. The detector should then be exchanged
immediately in order to be able to keep using the higher
reliability of detection of the OTC detector.
Improved LSN features
The 420 Series Fire Detectors offer all the features of the
improved LSN technology:
•
Flexible network structures, including "T‑tapping"
without additional elements
•
Up to 254 LSN improved elements per loop or stub line
•
Automatic or manual detector addressing selectable via
rotary switch, in each case with or without auto-
detection
•
Power supply for connected elements via LSN bus up to
300 mA
•
Unscreened fire detection cable can be used
•
Cable length up to 1000 m
•
Downwards compatibility to existing LSN systems and
central units
LSN features
Operating data display
In addition, the FAP/FAH-420 detectors offer all the
established benefits of LSN technology. RPS or WinPara
software can be used to change the detection
characteristics of the respective room utilization. In
addition, each configured detector, with the exception of
the KKW types, can provide the following data:
•
Serial number,
•
Contamination level of the optical section,
•
Operating hours,
•
Current analog values.
Analog values are:
•
Optical system values: current measured value of the
scattered light sensor; the measuring range is linear and
covers from 170 (new) to 700 (dirty).
•
Contamination: the contamination value shows how
much the current contamination value has increased
relative to the original condition.
•
CO value: display of the current measured value
(max. 550).
Self-monitoring of sensor technology
The sensor is self-monitoring. The following errors are
indicated on the fire panel:
•
Fault indication in the event of the failure of the
detector electronics
•
Continuous display of contamination level during
service
•
Fault indication if heavy contamination is detected (in
place of false alarms)
In the event of wire interruption or short-circuit, integrated
dividing elements maintain the functional security of the
LSN loop.
In the event of an alarm, individual detector identification
is transmitted to the fire panel.
Further performance characteristics
The detectors have a dust-repellent labyrinth and cap
construction.
The detector alarm indication takes the form of a red
flashing LED that is easily visible 360°.
It is possible to activate a remote external detector alarm
display.
The stable and robust detector base no longer has to be
directed due to the centralized position of the individual
display.
The integrated strain relief for interfloor cables prevents the
removal of cables from the terminal after installation. The
terminals for cable cross-sections up to 2.5 mm
2
are very
easily accessible.
The detector bases have a mechanical removal lock (can be
activated/deactivated).
Certifications and Approvals
The detectors comply with:
Region Certification
Europe CE FAP-/FAH-420 / FAA-MSR420 / FAA-MS-
R-SP
FAP- / FAH-420 KKW
CPD 0786-CPD-20129 FAH-T 420
0786-CPD-20128 FAH-T 420 KKW
0786-CPD-20117 FAP-O 420
0786-CPD-20125 FAP-O 420 KKW
0786-CPD-20118 FAP-OT 420
0786-CPD-20119 FAP-OT 420
0786-CPD-20120 FAP-OTC 420
0786-CPD-20121 FAP-OTC 420
Germany VdS G 205080 FAP-OTC 420
G 205081 FAP-OT 420
G 205082 FAP-O 420
G 205083 FAH-T 420
G 205088 FAP-O 420 KKW
G 205089 FAH-T 420 KKW
Turkey TSE 14.10.01/TSE-6990 Detectors
Bosch Security Systems B.V. www.boschsecurity.com
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