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For a broader application scope: Bosch launches new version of TÜV certified Praesideo Public Address and Emergency Sound System


· Enhanced flexibility in system design
· Public address and emergency sound system in one for increased cost-effectiveness

Praesideo Version 3.0 includes new additional hardware such as an updated Network Controller, a Multi Channel Interface and Basic Amplifiers. These new devices will further enhance Praesideo’s position in this competitive market by giving customers more flexibility in design and a more optimal and cost-effective solution. Praesideo is therefore ideal for medium-sized to big applications like shopping centers, educational establishments, offices, multi-purpose sports stadia and airports.

Network Controller
The updated Network Controller is equipped with a more powerful processor for even faster system response within very large systems. It also includes a 48 V DC battery back-up input.

Multi Channel Interface
The Multi Channel Interface is connected to the Praesideo optical system bus and acts as the interface to the system’s Basic Amplifiers. It enables supervision of the unit itself and of the connected Basic Amplifiers, and also controls spare amplifier switching. The Multi Channel Interface has a built-in controller for digital multiple line and loudspeaker supervision, embedded on the existing loudspeaker lines. It controls 16 audio channels/ outputs, including redundant group A/B switching or class-A loop wiring for the Praesideo Basic Amplifiers. Furthermore, the Multi Channel Interface provides connections for 32 control inputs and 16 control outputs.

Basic Amplifiers
The new Basic Amplifiers are rated 2 x 250 W and 1 x 500 W. They are high efficiency class-D amplifiers with built-in output transformers to drive 100 V and 70 V loudspeakers. They offer an analog audio line input for connection to the Multi Channel Interface as well as an additional analog line input for low priority local audio. They provide overload protected connections for separate group A and group B redundant loudspeakers in a zone and can be configured for class-A loudspeaker loop wiring. The Basic Amplifiers feature a switch mode power supply with low inrush current and operate both on mains and 48 V battery power. Power supply and amplifiers are fully supervised. Stand-alone operation is possible. Later this year the range will be extended with 4 x 125 W and 8 x 60 W versions. The Standard Praesideo Amplifiers remain in the product range for applications, which demand Digital Signal Processing functionality such as delay, equalizing or automatic volume control.

TÜV tested and certified
Praesideo Version 3.0 has been independently TÜV tested to EN/IEC 60849 certification for “Sound Systems for Emergency Purposes”. This means Bosch can assure not just installers but also fire departments, consultants/specifiers and end-users that the EVAC systems they are using comply with the strictest requirements of the EN 60849 standard for public buildings.

Subjecting their products to this unique level of independent testing shows that Bosch Security Systems apply the strictest design criteria to provide PA and Emergency Sound Systems that meet the highest industry standards for functionality, safety and quality.

The Bosch Group is a leading global manufacturer of automotive and industrial technology, consumer goods, and building technology. In fiscal 2005, some 251,000 associates generated sales of 41.5 billion euros. Set up in Stuttgart in 1886 by Robert Bosch (1861-1942) as “Workshop for Precision Mechanics and Electrical Engineering,” the Bosch Group today comprises a manufacturing, sales, and after-sales service network of more than 280 subsidiaries and more than 12,000 Bosch service centers in over 140 countries.

The special ownership structure of the Bosch Group guarantees its financial independence and entrepreneurial freedom. It makes it possible for the company to undertake significant up-front investments in the safeguarding of its future, as well as to do justice to its social responsibility in a manner reflective of the spirit and will of its founder. 92 % of the shares of Robert Bosch GmbH are held by the charitable foundation Robert Bosch Stiftung. The entrepreneurial ownership functions are carried out by Robert Bosch Industrietreuhand KG.

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