Voice Alarm Controller; Introduction; Hand-Held Microphone; Internal Power Amplifier - Bosch Plena LBB1990/00 System Manual

Plena Voice Alarm System | Basic System Manual | System Overview
2.3

Voice alarm controller

2.3.1

Introduction

The LBB1990/00 Voice Alarm Controller is the heart of
the Plena Voice Alarm System. The voice alarm
controller distributes emergency calls, business calls as
well as background music (BGM) to up to 6 loudspeaker
zones.
figure 2.2: Voice Alarm Controller
Note
When the voice alarm controller has been
purchased in the Asian-Pacific Region, the
emergency button has a different cover.
2.3.2

Hand-held microphone

The voice alarm controller is equipped with a hand-held
microphone, which can be used to make emergency
calls.
2.3.3

Internal power amplifier

The voice alarm controller has a 240 W internal power
amplifier, which can be used in 1-channel or 2-channel
mode. In the 1-channel mode, all calls and BGM are
amplified by the internal power amplifier. If desired, an
external power amplifier can be connected for spare
switching. In the 2-channel mode, the BGM is amplified
by the internal power amplifier, whereas the calls are
amplified by an external power amplifier.
Bosch Security Systems | 2005-04 | 9922 141 10364en
2.3.4

Internal message manager

The voice alarm controller has an internal message
manager, which maps wave files (.wav) to messages that
can be played by the Plena Voice Alarm System.
2.3.5

Supervision

All necessary supervision features for compliance to
evacuation standards are integrated into the voice alarm
controller. If supervision is enabled and a fault is
detected, the voice alarm controller lights a LED on its
front panel that indicates the cause of the fault.
2.3.6

Overview

See figure 2.3 for an overview of the controls,
connections and indicators on the voice alarm
controller:
1 Power LED/VU Meter - A combined power
indicator and VU meter. The green power LED is lit
if the voice alarm controller is connected to the
mains or back-up power and switched on. The VU
meter indicates the master VU level: 0 dB (red), - 6
dB, -20 dB (yellow).
2 Fault indicators - Twelve yellow system fault
LEDs (Processor reset, Network, Call/EMG, Music/
Spare, Ground short, Input, Mains, Battery, Message,
EMG mic, RCP and Router) and twelve yellow
loudspeaker line fault LEDs. Fault indication is only
possible if supervision is enabled (see section 5.7). If
supervision is disabled, the yellow Disabled LED is
lit.
3 Fault state buttons - Two buttons to acknowledge
(Ack) and reset (Reset) the fault state (see section
5.7).
4 Emergency state buttons - Two buttons to
acknowledge (Ack) and reset (Reset) the emergency
state (see section 5.6).
5 Emergency call zone selectors - Six buttons to
select the zones to which the emergency call must be
distributed (see section 5.6). Each button has a green
and a red LED. The six red LEDs indicate the zones
that are selected for the emergency call. The six
green LEDs indicate the zones in which a business
call is running.
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