Bosch LBB 1968 Manual de usuario descargar pdf (Pagina 19)

46 | Plena Range

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Communication

LBB 1965/00 Plena Message

Manager

The Plena message manager is a high performance, highly

versatile stand-alone digital message player. Applications range

from spot announcements in supermarkets and theme parks to

warning and evacuation messages in emergency situations.

Features

• Highly flexible stand-alone digital message player

• Up to 12 messages and 12 trigger inputs

• Uploads messages from a PC in WAV-format

• Compliant with standards for emergency sound systems

• Zone control for Plena system pre-amplifier LBB 1925/10

• Front panel control and remote control

Functions

Messages

Up to 12 messages can be stored in the internal 64Mbit

EEPROM, without the need for data retention battery backup.

Each message can have any length within the total available

capacity. Messages and configurations are uploaded from a PC

via RS-232 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

500 s of recording time with CD-quality signal-to-noise ratio. The

use of linear PCM instead of some sort of compressed audio

format (like MP3, ADPCM and u-law/A-law) ensures high-quality

playback of all types of audio signals, including sound effects

and special tones, e.g. attention chimes.

The unit has 12 contact closure trigger inputs for

announcements. Each can be configured for a sequence of up

to 4 messages out of the available ones. In this way some

messages may be used in different combinations with other

messages, optimizing flexibility and used storage space.

Together with this sequence, for each trigger input, a zone

selection can be configured for the LBB 1925/10, the Plena 6-

zone system pre-amplifier. The LBB 1965/00 communicates this

selection to the LBB 1925/10 via an RS-232 link. Continuous

activation of a trigger input repeats the corresponding message

sequence.

Trigger Inputs

The trigger inputs have a serial priority, i.e. input 1 has priority

over input 2, input 2 over input 3, et cetera. The high priority

trigger inputs 1-6 are only accessible as contacts on the rear

panel to avoid accidental use. The lower priority trigger inputs

7-12 are also available as trigger switches on the front panel.

Emergency and Evacuation Messages

The LBB 1965/00 can also be used for playing emergency/

evacuation messages; it fulfills the IEC60849 standard. The

content of all messages is constantly being supervised. The

microcontroller uses a watchdog circuit. The D/A-converter is

supervised by a low-frequency pilot tone. The high-priority

trigger inputs 1-6 can be set to be supervised for cable shorts

and breaks. The mains input availability is supervised. A 24 V

battery back-up connection with automatic switch-over is

provided. Plus, a 20 kHz pilot tone can be mixed with the output

signal for supervision of the link to the next amplifier and even for

loudspeaker supervision in combination with 20 kHz detectors.

Any failure results in a red LED fault indication and activation of a

fault output contact.

Loop Trough Facility

The LBB 1965/00 provides a loop-through facility with balanced

XLR and unbalanced Cinch inputs and outputs. This allows for

insertion of the unit into an existing audio link. As long as no

announcements are playing the signal input is routed to the

output. If an announcement is started, the input signal is

interrupted and the announcement is routed to the output.

Updating

Messages and configuration settings are uploaded from a PC.

After uploading, the configuration for trigger inputs/switches

7-12 can be updated by using just the front-panel switches,

without the need for a new upload or even a PC.

A headphone connection is provided for monitoring the

message content.

Parts Included

Certifications and Approvals

Quantity Component

1 LBB 1965 Plena Message Manager

1 19" mounting brackets

1 Power cord

EMC emission acc. to EN 55103-1

EMC immunity acc. to EN 55103-2

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Bosch LBB 1968 Manual de usuario Pagina 19

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