Bosch Appliances 3.5 manual Clause / Requirement

Praesideo 3.5 Installation and User Instructions EN54-16: 2008

en 54

Clause / Requirement	Compliance	Signature
13.14 Redundant power amplifiers	Praesideo is compliant.
(option with requirements)
13.14.1 The VACIE may have provision for at least one	Each power amplifier channel of the Praesideo system has
spare power amplifier. In this case:	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	After fault detection of an amplifier all loudspeaker lines are
amplifier shall be capable of being replaced	switched automatically to the spare amplifier (if connected
automatically with a spare amplifier within 10 s of the	and configured) within 10 s.
fault being detected;
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	Each power amplifier channel of the Praesideo system has
same functionality and output power as the replaced	a spare amplifier input. The installer shall take care of
amplifier.	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	All Praesideo power amplifiers are supervised for overload,
general fault warning indicator as specified in 8.2	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	The spare amplifiers can be continuously supervised,
maintained during the functional condition whilst the VACIE	whether it is in idle or active state; this is configurable.
is powered by either the mains or standby power supplies.	The supervision is active whilst the Praesideo system is
	powered by either the mains or standby power supplies.

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