Bosch Praesideo 4.0 - Инструкция (Страница 69)

Praesideo 4.0 en | 79
Bosch Security Systems B.V. IUI-PRAESIDEO_4.0 | V1.0 | 2013.01 Installation and User Instructions
13.14 Redundant power amplifiers
(option with requirements)
Praesideo is compliant.
13.14.1 The VACIE may have provision for at least one
spare power amplifier. In this case:
Each power amplifier channel of the Praesideo system
has an input for connecting a spare amplifier channel. It
also contains a switch-over relay to switch the
loudspeaker load from the original amplifier output to the
spare amplifier output. A spare amplifier channel
assignment is configurable to multiple main amplifier
channels.
a in the event of the failure of a power amplifier, the
faulty amplifier shall be capable of being replaced
automatically with a spare amplifier within 10 s of the
fault being detected;
After fault detection of an amplifier all loudspeaker lines
are switched automatically to the spare amplifier (if
connected and configured) within 10 s.
NOTE - This can be achieved, for example, by switching
or by permanently connected parallel amplifiers.
b
the spare power amplifier(s) shall have at least the
same functionality and output power as the replaced
amplifier.
Each power amplifier channel of the Praesideo system
has a spare amplifier input. The installer shall take care
of proper installation and configuration of the amplifiers
to match amplifier power and number of channels per
amplifier. Praesideo takes care of input signal switching
to the spare amplifier channel, including adaptive sound
processing. This way the spare power amplifier(s) will
have the same functionality and output power as the
replaced amplifier.
13.14.2 Every fault of an amplifier shall be indicated by a
general fault warning indicator as specified in 8.2
All Praesideo power amplifiers are supervised for
overload, overheating, short-circuit, ground short and
amplifier defect. If any such fault is detected it is
indicated both by means of the general fault warning
indicator and by means of an individual fault report.
13.14.3 Supervision of the spare amplifier(s) shall be
maintained during the functional condition whilst the
VACIE is powered by either the mains or standby power
supplies.
The spare amplifiers can be continuously supervised,
whether it is in idle or active state; this is configurable.
The supervision is active whilst the Praesideo system is
powered by either the mains or standby power supplies.
Clause / Requirement Compliance Signature