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Praesideo 3.5 | Installation and User Instructions | EN54-16: 2008
Clause / Requirement
b
an indication at least common to any earth fault of less
than 50 kΩ is capable of affecting a mandatory
function, and which is not otherwise indicated as a fault
of a supervised function;
c
an indication of the rupture of any fuse within the
VACIE, or the operation of any protective device within
the VACIE which is capable of affecting a mandatory
function in the fire alarm condition;
d
an indication of any short circuit or interruption, at least
common to all transmission paths between parts of the
VACIE contained in more than one cabinet, which is
capable of affecting a mandatory function and which is
not otherwise indicated as a fault of a supervised
function.
These indications may be suppressed during the fire alarm
condition.
8.2.4 The following faults shall be indicated at least by
means of the general fault warning indicator:
a
any short-circuit or interruption in a voice alarm
transmission path between parts of the VACIE
contained in more than one cabinet even where the
fault does not affect a mandatory function;
b
any short-circuit or interruption in the voice alarm
transmission path to the emergency microphone
capsule, if provided;
c
any short-circuit or interruption in the voice alarm
transmission path between the VACIE and
loudspeakers even where the fault does not affect the
operation of loudspeakers.
Bosch Security Systems | 2011-02
Compliance
All 100V lines of the Praesideo system can be supervised
individually for earth faults (i.e. connections to earth with a
leakage resistance of less than 50 k).
Every rupture of a fuse or the operation of a protected
device that affects a mandatory function will result in a fault
since the mandatory functions are supervised. The reported
fault is as close to the located defect as possible. E.g. a
mains related fault is reported as a mains fault and an
amplifier defect is reported as defect for that amplifier
channel.
All network based transmission paths of the Praesideo
system are supervised using a keep-alive mechanism. The
CobraNet transmission path of the Praesideo system is
supervised by means of clock availability.
When the Praesideo system is used in a redundant loop
configuration, the loss of the redundant path is reported.
All control input contacts of the Praesideo system can be
supervised for shorts and interruptions.
Analog audio connections to external parties can be
supervised by pilot tone supervision.
The analog fail safe bypass input of the Praesideo multi
channel interface can be supervised by pilot tone
supervision.
Praesideo fault indicators are not suppressed. There are
separate indicators for fault and voice alarm conditions. The
only exception is that the automatic indication of the voice
alarm condition has precedence over the automatic
indication of the number of present faults on the display of
the network controller.
All network based transmission paths of the Praesideo
system are supervised using a keep-alive mechanism. The
CobraNet transmission path of the Praesideo system is
supervised by means of clock availability.
When the Praesideo system is used in a redundant loop
configuration, the loss of the redundant path is reported.
All control input contacts of the Praesideo system can be
supervised for shorts and interruptions.
Analog audio connections to external parties can be
supervised by pilot tone supervision.
The analog fail safe bypass input of the Praesideo multi
channel interface can be supervised by pilot tone
supervision.
The capsule of the Praesideo (emergency) call station
microphone can be supervised for both short-circuit and
interruption. This is configurable. Also the microphone
inputs on the power amplifiers supervise the connected
microphone.
The loudspeaker lines of the Praesideo system can be
supervised using a master-slave communication system
that uses the actual loudspeaker wiring for polling. The
communication is inaudible and not affected by audio
signals present.
Praesideo offers two options: single loudspeaker line
supervision (master-slave) and multiple loudspeaker line
supervision (master-multiple slaves) that detect short-
circuits and interruption of the loudspeaker lines.
The installer shall only use the 100 V outputs of the
Praesideo amplifiers.
en | 36
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