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5. Description
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5. Description
The eXentro ECU emergency control unit is the main system controller in a voice alarm system,
which monitors all connected low impedance & 50/100 V loudspeaker lines (both A&B lines),
zone & backup amplifiers, emergency paging panels and AC & DC power sources. It includes
pre-recorded messages of which two can be played simultaneously, routed to different outputs.
Any monitored fault will be indicated by the General Error or System Fault indicator on the front
panel and internal buzzer, some by means of additional information indicated on the Graphic
Display, and by multiple Error output relay contacts. Power, System Fault, General Error and
Alarm status are located on the front panel. The system design and settings are stored on a
removable memory chip
Expansion of the 4 outputs zones up to 12 outputs (using 2 expansion cards) in one unit. Up
to 32 ECU units can be used in one voice alarm system to create up to 384 alarm zones, each
with an A and B loudspeaker line. Multiple Fire Panels, EVACuation panels and/or Fire Alarm
System interfaces, expandable up to 196 buttons/inputs, can be connected to meet the
installation/system requirements. The ECU unit can be powered from 230 VAC and from 48 VDC
power supplies when redundant operation is required.
System integrity:
The eXentro Voice Alarm system will detect any fault within 100 seconds and will react on these
accordingly. The system features advanced functionality to maintain operating requirements,
which limits the consequences of faults to ensure maximum audibility and intelligibility of
announcements during emergency situations:
• Monitoring of loudspeaker lines – using adaptive line monitoring to increase the reliability of
the line monitoring, which reduces wrong failure reports e.g. due to temperature changes
• A & B loudspeaker configuration – to maintain audibility of announcements in an alarm zone:
if 1 line fails only a 50% reduction of SPL occurs, while coverage can still be maintained
• Possibility to connect multiple A & B loudspeakers lines per amplifier channel – to increase
overall coverage of large zones
• Monitoring of amplifiers – each amplifier channel is measured independently: if a channel fails
it will be substituted by an available backup amplifier channel
• Multiple backup amplifiers – all 12 outputs of the eXentro ECU unit can be covered by 1 backup
amplifier channel > to increase the integrity of the system up to 3 backup amplifier channels can
be connected to a single eXentro ECU unit covering all 12 zones (1 backup amp for each 4 zones)
• Monitoring of AC mains power supply – each individual system component monitors the AC
mains power supply and has the possibility to switch to 48VDC when its own AC connection
fails
• Emergency power supply – certified according EN54-4: covers the complete system during
AC mains loss, while maintaining output power keeping SPL level(s) unaffected.
• Energy Save Mode – reduces the Idle current consumption of the batteries during an AC mains
loss; saves available battery power capacity which can result in possibly longer duration of
emergency situation at full power. NOTE: refer to local system requirements for minimum
duration required for Idle and Full power operation.
• Monitoring of control inputs – connection to all control inputs are monitored for open line and
short circuits
• Redundant connection (optional) between ECU units & Emergency panels – option to have a
second connection between units which ensures an emergency call can still be made if the
main connection fails
• Multiple inputs to connect emergency panels – inputs are independently monitored, if 1 input
fails an emergency call can still be made on an emergency panel connected to the other input
