Technical Specifications - Bosch FNM-420-A-BS-RD Installation Manual

Base Sounder Indoor
1 Safety instructions
Notice!
Installation must only be carried out by authorized personnel.
If you operate the base sounder without automatic detector or
LSN strobe, you must bridge contacts b1 and b2.
Only if the sounder volume is set to the maximum level, the
certified sounds (no. 1, 8, 10, 24) comply with EN 54-3.
Certified sound measurements are listed in
Bulletin_Sound_Pressure_Level_EN54-3.pdf (F.01U.344.057),
which can be obtained from the manufacturer.
Warning!
Live components and stripped cable! Risk of injury from electric
!
shock. The system must be current-free during connection
work.
Caution!
Electrostatic discharge (ESD)! Electronic components could
become damaged. Ground yourself using a wrist strap or take
other suitable actions.
2 Functional description
The volume of each 32 tone variants (incl. DIN tone DIN 33404
part 3) has up to 5 levels and can be adjusted according to the
operational environment. The sound level varies between 65 dB
and 92 dB depending on the tone type and volume. You can
operate the base sounder using a 420 series automatic detector,
a FNS-420-R LSN Strobe or a suitable cover.
3

Technical specifications

See Installation, page 4.
Bosch Sicherheitssysteme GmbH
Safety instructions | en
2017.12 | 4 | F.01U.099.622
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