Bosch F.01U.505.983 Datasheet
Communications Systems | LBC 3086/41 Ceiling Loudspeaker
LBC 3086/41 Ceiling Loudspeaker
Suitable for speech and music reproduction
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Flush-mounting in ceiling cavity
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Easy to install
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Simple power setting
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Optional certified fire dome
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Unobtrusive in virtually all interiors
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Complies with international installation and safety
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regulations
BS‑5839‑8, EN 54‑24 and EN 60849 compliant
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Voice alarm loudspeakers are specifically designed for use
in buildings where performance of systems for verbal
evacuation announcements is governed by regulations.
The LBC 3086/41 is designed for use in voice alarm
systems and is compliant with British standard BS 5839-8.
Functions
The loudspeaker unit is a 6 W, dual-cone loudspeaker with
an integrated circular metal grille. A 100 V matching
transformer is mounted on the back. The appearance and
neutral white RAL color have been selected to be
unobtrusive in virtually all interiors.
The loudspeaker has built-in protection to ensure that, in
the event of a fire, damage to the loudspeaker does not
result in failure of the circuit to which it is connected. In
this way, system integrity is maintained, ensuring
loudspeakers in other areas can still be used to inform
people of the situation. The loudspeaker has ceramic
terminal blocks, thermal fuse and heat-resistant, hightemperature wiring. It can also be fitted with an optional
fire-dome to increase protection of the cable termination.
Certifications and Approvals
All Bosch loudspeakers are designed to withstand
operating at their rated power for 100 hours in
accordance with IEC 268-5 Power Handling Capacity
(PHC) standards. Bosch has also developed the Simulated
Acoustical Feedback Exposure (SAFE) test to demonstrate
that they can withstand two times their rated power for
short durations. This ensures extra reliability under
extreme conditions, leading to higher customer
satisfaction, longer operating life, and much less chance
of failure or performance deterioration.
Region Certification
Europe CE
Poland CNBOP
Safety acc. to EN 60065
Emergency acc. to BS 5839‑8 / EN 54‑24 / EN 60849
* Water and
dust protection
* only in combination with the LBC 3081/02 Fire Dome
acc. to EN 60529‑IP32
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Installation/Configuration Notes
Installation
The assembly is quickly installed into a hole in the ceiling
cavity. A separate mounting ring, secured by three integral
spring-loaded ceiling locking clamps (for ceilings and wall
boards from 9 to 25 mm thick) holds it in place. The
clamps are provided with protective rubbers to avoid
damaging soft ceiling material. A circular template for
marking a 196 mm (7.7 in) diameter hole is included with
the loudspeaker. The loudspeaker unit is held in the
mounting ring with a bayonet fitting.
Terminal Block
The unit has a three-way terminal block with screw
connections suitable for loop-through wiring. Four primary
taps are provided on the matching transformer to allow
selection of nominal full-power, half-power, quarter-power
or eighth power radiation (i.e. in 3 dB steps).
LBC 3081/02 Fire Dome Assembly
During a fire, the ceiling cavity in which loudspeakers are
installed can allow flames to spread throughout a
building. To prevent fire entering the caving via the
loudspeaker, the ceiling loudspeaker can be fitted with a
protective steel fire dome (LBC 3081/02).
Dimensions in mm (in)
LBC 3086/41 with LBC 3081/02 fire dome assembly
Circuit diagram
LBC 3086/41 with LBC 3081/02 fire dome assembly
dimensions in mm (in)
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