Bosch Praesideo 4.0 User Manual download pdf (Page 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

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Bosch Praesideo 4.0 User Manual Page 63

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