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Praesideo 4.3
Clause / Requirement
13.5.3 A single short circuit or an interruption in any voice
alarm transmission path between distributed cabinets of a
VACIE shall not prevent the activation of a voice alarm
output condition to more than one voice alarm zone for
longer than 100 s following the occurrence of the fault.
13.5.4 If the VACIE is designed to be used with a power
supply (item L of Figure 1 of EN 54-1) contained in a
separate cabinet, then an interface shall be provided for at
least two voice alarm transmission paths to the power
supply, such that a short circuit or an interruption in one
does not affect the other.
Bosch Security Systems B.V.
Compliance
The voice alarm transmission path between distributed
cabinets of the Praesideo system is achieved by means of
the system bus.
A single interruption or short circuit in any data segment of
this system bus does not prevent proper functioning of the
system (including activation of a voice alarm output
condition to more than one voice alarm one) as long as the
system has redundant cabling.
The system bus also offers a power circuit. This power
circuit is used to provide power to system elements that do
not have its own main power supply. These elements are:
audio expander, CobraNet interface, multi channel
interface, call station basic with call station keypads, call
station module with call station keypad modules, call
station interface, remote call station with call station
keypads, remote call station module with call station
keypad modules. A single interruption or short circuit in the
power circuit of the system bus can affect these system
elements, since they will lose their power and therefore be
turned off. However this can be fixed by proper installation
and configuration for the following elements:
•
multi-channel interface - this unit can be
configured to use a connected basic amplifier as its
power source (default setting) to share the main
and backup power supply of the basic amplifier.
•
call station module - a backup power supply can be
connected in order to power the call station
externally if the network power supply fails.
•
call station interface - a backup power supply can
be connected in order to power the call station
interface externally if the network supply fails; this
back-up power supply can then power both the call
station interface and the connected remote call
station.
•
remote call station - an external power supply can
be connected in order to power the call station
externally if the network power supply fails.
•
remote call station module - a backup power supply
can be connected in order to power the call station
externally if the network power supply fails.
The basic call station does not have a backup power supply
and should therefore not be used as voice evacuation call
station. The installer must take care of proper installation
and configuration of the system.
The audio expander and CobraNet interface units will not
prevent the activation of a voice alarm output condition to
more than one voice alarm zone as long as they do not
interrupt the system bus when the network power supply
fails. This can be achieved in two ways: either by installing
them on tap-off points in the network using a network
splitter or by ensuring all of these units are placed together
on the ring with no other type of units in between them. This
way they can never break the redundant ring. The installer
must deplory one of these solutions in the system
installation.
If a 19"-cabinet (rack) or adjacent cabinets provide enough
space for the battery and/or charger, the installer can install
the complete PSE (power supply equipment) as referred in
EN54-4 in one cabinet. In that case this requirement is not
applicable.
In case the installer installs the backup part of the PSE
(battery and charger) in a separate cabinet, Praesideo
provides a separate (monitored) DC-backup connection on
the Praesideo units. This implies that a Praesideo
installation will always have two separate voice alarm
transmission paths to the power supply: one for mains and
one for DC backup. Both will not influence each other.
The installer must take care that the installation complies
with this requirement.
Manuel d'installation et d'utilisation
Signature
IUI-PRAESIDEO_4.3 | V1.0 | 2015.02
fr | 69
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