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Communication Systems | LBB 1990/00 Plena Voice Alarm Controller
The Plena Voice Alarm Controller is the heart of the voice
alarm system. It is the basis of the Plena Voice Alarm
System, and has all the essential functionality for
compliance with the IEC 60849 standard, including full
system supervision, loudspeaker line impedance
supervision, a supervised emergency microphone on the
front panel and a supervised message manager.
The messages can be merged to allow even more flexible
use of pre-recorded announcements and evacuation
messages. The controller can be used as a stand-alone
system with up to 6 zones, or expanded to up to
60 zones using additional 6-zone routers. Up to 8 call
stations can be connected. Interconnections are made
using standard RJ45 connectors and shielded CAT-5
cable.
A built-in 240 W amplifier provides the power for the
emergency call channel and BGM. Additional Plena
Amplifiers can be added to provide two-channel
operation, or for additional power if the total power
requirement exceeds 240 W (maximum 480 W per 6
zones). All amplifiers are supervised. The audio output
uses standard analog audio 100 V line switching for full
compatibility with the Plena family of public address
equipment and Bosch EVAC-compliant loudspeakers.
The system is configured using DIP switches for basic
functionality and a PC for more advanced functions.
Functions
The controller has two BGM source inputs and a mic/line
input with configurable priority, speech filter, phantom
power and selectable VOX activation. A total of 16
priority levels can be specified for microphone, call
stations and trigger inputs for optimum system
flexibility.
The powerful 240 W output section has six transformer-
isolated 100 V constant voltage outputs for driving 100 V
loudspeakers in six separate zones. The 100 V-technique
reduces line losses on longer distances and allows for
easy parallel connection of multiple loudspeakers. All
zones may be individually selected from the front panel,
and the BGM output level in each zone can be
individually set in 6 steps. The BGM output is connected
to the 70 V line, so it is possible to connect a total load
of 480 Watts in a two-channel system combined with a
480 Watt booster.
The output of the booster is also available as a separate
output on 100 V and 70 V. A separate 100 V Call Only
output is provided for addressing an area where BGM is
not required but where priority announcements are. Six
configurable Volume Override output contacts are
available for overriding local volume controls during
priority calls. A LED VU-meter monitors the output.
Up to 255 messages can be stored in the internal
16 MB flash ROM, without a need for battery backup.
LBB 1990/00 Plena Voice Alarm Controller
▶
Heart of the Plena Voice Alarm System
▶
Compliant with standards for emergency sound
systems (IEC60849)
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6-zone system controller
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Built-in 240 W booster amplifier
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12 Business and emergency control inputs and
outputs
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