Bosch LBB 1990 0 User Manual
Communication Systems | LBB 1990/00 Plena Voice Alarm Controller
LBB 1990/00 Plena Voice Alarm Controller
Heart of the Plena Voice Alarm System
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Compliant with standards for emergency sound
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systems (IEC60849)
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
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outputs
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 transformerisolated 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.
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2 | LBB 1990/00 Plena Voice Alarm Controller
Each message can have any length within the total
available capacity. Messages and configurations are
uploaded from a PC via USB into the memory, after
which the unit operates without PC connection. The
standard WAV-format is used for the messages and
sample rates of 8 kHz up to 24 kHz with 16-bit word
length (linear PCM) are supported. This gives up to 17
minutes of recording time with CD-quality signal-tonoise ratio.
The unit has 12 contact trigger inputs for business and
emergency (EMG) calls. Each can be configured for a
message consisting of a sequence of up to 8 wave files.
In this way some wave files may be used in different
combinations with other messages, optimizing flexibility
and used storage space. Multiple messages can be
merged to form one integrated message. Together with
this sequence, for each trigger input, a zone selection
can be configured.
Certifications and Approvals
EMC emission acc. to EN 55103-1
EVAC compliance acc. to IEC 60849
EMC immunity acc. to EN 55103-2
Safety acc. to EN 60065
Installation/Configuration Notes
Rear view
Parts Included
Quantity Component
1 LBB 1990/00 Plena Voice Alarm Controller
2 19”Mounting brackets
1 Mains cable
1 Plena CD
Technical Specifications
Electrical
Mains Voltage 230 / 115 VAC, ±10%, 50 / 60 Hz
Main Power Consumption 60 VA
Max/Rated Output Power 360 W / 240 W
Battery Current 24VDC, +20% / -10%
Max Mains Inrush Current 8A @ 230 VAC / 16A @ 115 VAC
Mains Current
System Idle 0.26 A = 60 VA
System Idle with Pilot Tone 0.6 A = 136 VA
Maximum Load*
24 V Current
System Idle 0.9 A
Maximum Load* 14 A
Performance
Frequency Response 60 Hz – 18 kHz (+1/-3 dB, @ -10 dB ref. rated
Distortion <1% @ rated output, 1 kHz
Bass Control -8/+8 dB @ 100 Hz
Treble Control -8/+8 dB @ 10 kHz
Inputs Mic / Line
Input Type XLR, 6.3 mm jack
Sensitivity 1 mV / 1V
S/N 63 dB (flat at max volume)
S/N 75 dB (flat at min volume/muted)
Headroom 25 dB
Speech Filter -3 dB@ 315 Hz, high-pass, 6 dB/oct
Phantom Power Supply 12 V
VOX Trigger Level –20 dB (100 V mic / 100 mV line)
Limiter Automatic
BGM and PC Call Station
Input Type Cinch stereo (converted to mono)
Input Level 200 mV – 2 V
Impedance 22 kOhm
S/N 70 dB (flat at max volume)
S/N 75 dB (flat at min volume/muted)
Headroom 25 dB
Trigger Inputs
Type MC1,5/14-ST-3,5
Activation Programmable
Supervision On EMG inputs, programmable
Supervision Method Series / parallel resistor
100 V Input MSTB 2,5 /16-ST
Power Handling Capacity 480 Watts
*) Maximum load means; maximum power out, maximum load 24V out, maximum number of
call stations
)
3.6 A = 830 VA
output)
or via input contact
6 EMG, 6 business
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