Bosch Appliances 3.5 manual 6LBB4402/00 Audio Expander, 6.1Introduction, 6.2Controls & connectors

Praesideo 3.5 Installation and User Instructions 3 Control Equipment

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6LBB4402/00 Audio Expander

6.1Introduction

The LBB4402/00 Audio Expander is used if the system requires additional audio inputs and outputs. See figure 6.1 for a block diagram of the audio expander. Unlike the network controller, the audio expander has transformer-isolated and balanced XLR inputs and outputs for easy interfacing to other systems. Furthermore, control inputs and outputs are available.

Display + Control

Audio inputs

Control inputs

POF

POF

A/D

I

Network

processor

+

DSP

Network

redundancy

switching

D/A

O

Audio outputs

Control outputs

figure 6.1: Block diagram of the audio expander

6.2Controls & connectors

6.2.1Front view

The front of the audio expander (see figure 5.2) contains the following:

1Menu display - A 2x16 character LCD display gives information about the audio expander (see

section 6.5).

2Menu button - A turn-and-push button to operate the menu (see section 6.5).

3Monitoring headphones output - A 3.5 mm (0.14 inch) jack socket to connect headphones for audio monitoring purposes.

Bosch Security Systems 2011-02