Bosch Plena Voice Alarm System User Manual download pdf (Page 3)

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Communication

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.

Features

• Heart of the Plena Voice Alarm System

• Compliant with standards for emergency sound systems

(IEC60849)

• 6-zone system controller

• Built-in 240 W booster amplifier

• 12 Business and emergency control inputs and outputs

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. 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-to-noise 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.

Parts Included

Certifications and Approvals

Quantity Component

1 LBB 1990/00 Plena Voice Alarm Controller

2 19”Mounting brackets

1 Mains cable

1 Plena CD

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

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