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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | EN60849: 1998 en | 19
e Failure of microphone, including capsule voice coil,
pre-amplifier and essential wiring to the rest of the
system.
Compliant. Fault is indicated by a control output of the
Network Controller, if properly installed. Fault is also
displayed by the Network Controller and the Logging
Viewer (optional).
f Failure of critical signal paths through the
amplification chain, with individual amplifiers
separately identified.
Compliant. Fault is indicated by a control output of the
Network Controller, if properly installed. Fault is also
displayed by the Network Controller and the Logging
Viewer (optional).
g Amplifiers or critical modules missing. Compliant. Fault is indicated by a control output of the
Network Controller, if properly installed. Fault is also
displayed by the Network Controller and the Logging
Viewer (optional).
h Failure of any standby amplifier. Compliant. Fault is indicated by a control output of the
Network Controller, if properly installed. Fault is also
displayed by the Network Controller and the Logging
Viewer (optional).
i Failure of emergency signal generators, including
emergency pre-recorded message stores.
Compliant. Fault is indicated by a control output of the
Network Controller, if properly installed. Fault is also
displayed by the Network Controller and the Logging
Viewer (optional). The chime generator is supervised by
a watchdog circuit. First 128 MB of compact flash card
(message store) is checked (first 25 minutes).
j Failure of any loudspeaker circuit (open- and short-
circuit faults).
Compliant, if properly installed using single or multiple
line supervision. Responsibility of the installer. Fault is
indicated by a control output of the Network Controller,
if properly installed. Fault is also displayed by the
Network Controller and the Logging Viewer (optional).
k Short-circuit or disconnection of visual alarm
devices.
Compliant, if properly installed. Responsibility of the
installer. Visual alarm device must provide feedback to
control input.
l Failure of a processor to correctly execute its
software program.
Compliant, using the control outputs of the Network
Controller.
m Detection of any error during memory checking. Compliant. Program memory is checked on correctness
via checksum during system start-up. Fault is indicated
by a control output of the Network Controller, if properly
installed. Fault is also displayed by the Network
Controller and the Logging Viewer (optional).
n Cessation of any scanning or interrogation
process.
Compliant. Fault is indicated by a control output of the
Network Controller, if properly installed. Fault is also
displayed by the Network Controller and the Logging
Viewer (optional).
o Failure of the interconnecting data or voice
communication links between parts of a distributed
system.
Compliant. Fault is indicated by a control output of the
Network Controller, if properly installed. Fault is also
displayed by the Network Controller and the Logging
Viewer (optional).
In addition to individual fault identification at these
locations, a common sounder shall sound for a
minimum of 0,5 s every 5 s. A fault shall cause the
sounder to operate in a latched mode and a visual
indicator to light, either steadily, or in a flashing mode.
Manual acceptance and reset switching shall be
included. When accepted, the sounder shall be
silenced and the indicator shall change to (or remain in)
steady illumination. The occurrence of a further fault
condition shall reactivate the sounder and the visual
indicator. When all the faults have been cleared, the
indicator shall be switched off, either automatically or
by operating a reset switch.
Compliant. Responsibility of the installer to install a
buzzer and a lamp using the control outputs of the
Network Controller. Acknowledge/Reset with Call
Station Keypad, if properly installed or in the Logging
Viewer.
The fault indication should be given within
100 s of the occurrence of the fault, regardless of
whether the voice alarm system is being used for non-
emergency purposes, such as the transmission of
background music.
Compliant.
Requirement Compliance Signature