Description Of Equipment - Bose FeVac Two Amplifier/Speaker Controller Installationsanleitung

Description of equipment

2. FeVac Two features
®
FeVac Two provides loudspeaker-circuit and output-stage monitoring. Up to 16 FeVac Two systems can
be attached to one FeVac One system. The address of each FeVac Two system is set by means of a 4-pole
DIL switch on the backpanel of FeVac Two.
AF ALARM and ALERT messages and the messages from a fireman's microphone are fed to the FeVac
Two systems via Patch 8 cables. These AF links are continuously monitored by the FeVac Two systems.
The signal level of the ALARM and ALERT messages and the signals from the fireman's microphones are
adjustable separately at each AF output. These adjustments, called input gain, can be made by means of
six small potentiometers on the backpanel of FeVac Two. The AF outputs have a transformer-
symmetrical configuration; the AF inputs have an asymmetrical configuration. If the system is unusable or
is switched off, the AF inputs and outputs are disconnected from that circuit and linked to eachother.
All output amplifiers connected to the system, including the two emergency output amplifiers, are
monitored by means of a 25 KHz pilot signal. If a system fails, the appropriate AF output is connected
to the input of the emergency amplifier. An emergency amplifier is also switched into the circuit when
an output amplifier becomes defective or is switched off.
If output amplifier 1, 2 or 3 malfunctions, emergency amplifier 1 is switched into the corresponding
loudspeaker circuit. If output amplifier 4, 5 or 6 malfunctions, emergency amplifier 2 is switched into the
corresponding loudspeaker circuit. When only one emergency amplifier is used and one of the amplifiers
(1-6) malfunctions, its connected loudspeakers circuit is switched over to the emergency amplifier.
When a short-circuit, a short to earth, an impedance abnormality or an open line is detected, an error
message is generated. When a short-circuit is detected, the shorted loudspeaker circuit is switched off.
For the line impedance measurement, different accuracy windows (with upper and lower limit) can be
selected (Low, Normal or High) depending on the numbers of loudspeakers connected.
The zones in which ALARM and ALERT messages are emitted can be pre-programmed. ALARM signals
can be emitted in some zones while ALERT signals are simultaneously being emitted in other zones.
Microphone 1 can be used to announce evacuation messages in dedicated zones.
Programming is linked with the alarm-switch tripping contacts of FeVac One.
Connections
Connect the FeVac One unit to the FeVac Two unit using the PATCH 8 cable (8 core twisted pair CAT5).
If several FeVac Two units are used, use the second PATCH 8 connection socket on the FeVac Two unit to
connect it to the next FeVac Two unit and so on until the different FeVac Two units are all connected to
each other. The maximum lenght of all patchcables may not exceed 10 meters.
Set a unique address for each FeVac Two in the system with the DIL switch (see the appendix: Address
settings on page 23) on the backpanel of FeVac Two.
Connect all line, amplifier and loudspeaker connections (see the appendix: System connections on page 22).
If only one emergency amplifier is used, follow the next procedure: When all connections have been made,
start the calibration of the system in FeVac One. After calibrating the system, bridge the 'Output Backup
Amp 2' connector to the 'Output Backup Amp 1'connector by using an Y-splitter cable. It is also necesarry to
bridge the 'Input Backup Amp 2' connector to the 'Input Backup Amp 1' connector by using two small
pieces of loudspeaker cable. If it is necesarry to start a new calibration, first disconnect the connections
('Output Backup 2' and 'Input Backup Amp2') as mentioned above, before the calibration is started. After
the new calibration, re-connect these backup amplifier wirings again as mentioned above.
Power supply connection
First ensure that your mains supply voltage is the same as the voltage shown on the rear of the unit.
Connect the FeVac Two unit to the mains power supply.
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