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Bosch Security Systems | 2011-02
Praesideo 3.5 | Installation and User Instructions | EN54-16: 2008 en | 47
13.4 Electrical and other design requirements Praesideo is compliant.
13.4.1 The processing of signals shall give the highest
priority to the voice alarm condition.
Calls within the Praesideo system have a configured
priority. In case of conflicting requirements, system
resources are assigned to the calls in order of priority.
Voice alarm call must be configured with a high priority
(priority 224-255). Many secondary functions of the system
can be configured to stop or pause in case calls above a
certain configured priority are present; this includes calls
below a certain configured priority.
13.4.2 Transitions between the main and the standby
power sources shall not change any indications and/or the
state of any outputs, except those relating to the power
supplies.
Transition between the main and standby power sources
does not change any of the indications and/or state of any
outputs of the Praesideo system, except for the fault
warning indication (global and individual) in order to report
the failure of a power source.
13.4.3 If the VACIE has provision for disconnecting or
adjusting the main or the standby power source, this shall
only be possible at access level 3 or 4.
The Praesideo system elements that have a mains and
backup power supply offer connectors for the main and
standby power source, a rear-mounted voltage selector
switch and on/off switch. The installer must ensure that
these items are only accessible at access level 3 or 4.
13.5 Integrity of transmission paths Praesideo is compliant.
13.5.1 A fault in any voice alarm transmission path between
the VACIE and other components of the voice alarm system
shall not affect the correct functioning of the VACIE or of
any other voice alarm transmission path.
The Praesideo system has the following voice alarm
transmission paths between itself and other parts of the
voice alarm system:
• transmission path between CIE and Praesideo
system via input contact or Open Interface;
• transmission path between Praesideo system and
the loudspeaker(s).
If there is a fault in the transmission path between the CIE
and an input contact of the Praesideo system, the
configured action of the input contact will not be
automatically activated or de-activated. The correct
functioning of the Praesideo system or of any other voice
alarm transmission path is therefore not affected. The fault
will just be reported.
If there is a fault in the transmission path between the CIE
and the Ethernet connection of the network controller of the
Praesideo system (connection via Open Interface),
methods can no longer be invoked by the CIE and no
events can be notified to the CIE. However the fault will not
affect the correct functioning of the Praesideo system or
any other voice alarm transmission path. The fault will just
be reported.
If there is a fault in the transmission path between the
Praesideo system, i.e. the amplifier outputs and the
loudspeaker(s), the loudspeaker(s) will not be able to
produce the intended audio signal. However the fault will
not affect the correct functioning of the Praesideo system
or any other voice alarm transmission path. The fault will
just be reported.
13.5.2 A short circuit or an interruption in the transmission
path to the loudspeaker(s) shall not affect more than one
voice alarm zone for longer than 100 s following the
occurrence of the fault.
Each audio output of the Praesideo system can only be
assigned to one voice alarm zone by means of
configuration. The IUI specifies this clearly. Due to this, a
short circuit or interruption in the transmission path to the
loudspeaker(s) only affects the voice alarm zone it was
assigned to.
Clause / Requirement Compliance Signature