Bosch Appliances 3.5 manual System overview

2011-02 Installation and User Instructions 2 Introduction

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2System overview

2.1Introduction

Praesideo is a fully digital public address system that meets all the requirements placed by professional users on a public address/emergency system. The system brings highly innovative and advanced digital technology to the public address market. The processing and communication of both audio signals and control data entirely in the digital domain makes the system a superior public address and emergency sound system.

Digital signal processing allows significant improvements in audio quality to be achieved. The Praesideo system is designed for configuration from a PC, which makes installation and setting of operating parameters very simple and user-friendly.

The Praesideo system satisfies almost all public address and voice alarm system requirements. All audio processing is performed in the digital domain. Communication between the units is via plastic fiber or glass fiber cabling, depending on the distance between the units. The cabling uses the daisy chain principle. This makes the cabling and installation very quick, simple and easy. The system cabling supports a closed loop, which allows redundancy to be achieved. If redundancy is not required, also branching is possible.

2.2User-friendly software control

The system is supplied with user-friendly software for system configuration. This allows all system functions to be configured. The software is based on web technology, which gives authorized users full freedom of configuration in terms of time and location. The simplified and accurate organization of the programming features makes navigation highly user- friendly and fault-tolerant. The software also provides clear indication of any parameters, which have not been configured before exiting from any stage of the configuration process.

2.3Networked approach

The system architecture is based on daisy-chaining of units. It is possible to add or remove equipment anywhere in the network without affecting the performance of other units, provided that the network connection is available. This makes the system easily expandible by the customer, without adding any additional electronics at the network controller unit. Thanks to this network architecture, users can start with a small system in the initial stage and expand the system later simply by adding the required new units to the existing network. The system can be configured for redundant cabling using a ring cabling structure.

2.4Distributed control

The system is designed for distributed control of various system functions. The external interfaces which are control inputs and outputs can be located anywhere in the network. The processing of audio input and output signals is located in each unit. This allows the network controller to concentrate on other activities like routing of announcements and taking actions on control inputs, etc. As a result the response times are much shorter than for systems with centralized processing of all signals.

2.5Combination of functions

The Praesideo range of equipment has multiple functions combined in a single unit. This feature drastically reduces the number of different types of equipment used in the system. Functions like audio processing, audio delay, amplifier monitoring and automatic amplifier change-over and receivers for speaker line monitoring are provided in the power amplifier unit itself. This makes the overall system highly cost-effective. The flexible architecture of the Praesideo range of equipment allows the customer to locate any type of equipment anywhere in the building. The configuration software enables the user to configure all the functional parameters. No programming is required at the equipment end, which drastically reduces the installation and commissioning time.

Bosch Security Systems 2011-02