Bosch Praesideo 4.0 - Инструкция (Страница 63)

Praesideo 4.0 en | 73
Bosch Security Systems B.V. IUI-PRAESIDEO_4.0 | V1.0 | 2013.01 Installation and User Instructions
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.
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 kit with call station keypad kits, call station
interface, remote call station with call station keypads,
remote call station kit with call station keypad kits. 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 kit - 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 kit - 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.
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.
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.
Clause / Requirement Compliance Signature