Praesideo 3.5 Installation and User Instructions 4 Amplifiers

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12Multiple loudspeaker line supervision

12.1Introduction

Multiple loudspeaker line supervision is available for the amplifiers as follows:

•PRS-1P500 Power Amplifier

•PRS-2P250 Power Amplifier

•PRS-4P125 Power Amplifier

•PRS-1B500 Basic Amplifier

•PRS-2B250 Basic Amplifier

•PRS-4B125 Basic Amplifier

•PRS-8B060 Basic Amplifier

Use the LBB4440/00 Supervision Control Board, LBB4441/00 Loudspeaker Supervision Board and LBB4443/00 EOL Supervision Board for multiple loudspeaker line supervision. With these boards, it is possible to supervise up to 80 loudspeakers in a loudspeaker line including the ends of the various branches in the loudspeaker line.

Note

Multiple loudspeaker line supervision is not possible in combination with LBB4428/00

Power Amplifiers.

The LBB4441/00 Loudspeaker Supervision Boards check if loudspeakers are intact, whereas the LBB4443/00 EOL (End of Line) Supervision Boards check if the loudspeaker lines are intact. Both types of boards are powered from the 20 kHz pilot tone of the Power Amplifier and communicate inaudibly with the LBB4440/00 Supervision Control Board, which controls the communication between Praesideo and the supervision boards. No additional wiring is required Communication is not affected by the audio signals on the loudspeaker lines. Faults in the loudspeakers and loudspeaker lines can be reported within 100 s. The use of multi-wire cables is not recommended in combination with line supervision because crosstalk between audio channels may influence the line supervision.

The Power Amplifiers have one Supervision Control Board LBB4440/00 per channel. The addresses of the connected EOL and loudspeaker supervision boards must be unique for that channel.

Multiple loudspeaker line supervision for the basic amplifiers PRS-xBxxx do not need the LBB4440/00 Supervision Control Board. The basic amplifiers work in co-operation with the multi channel interface that already contains the Supervision Control Board function for all connected basic amplifiers. Use the LBB4441/00 and the LBB4443/00 Supervision boards as required. No Supervision Control Boards need to be installed into the basic amplifiers.

For basic amplifiers, the addresses in the address range are shared between all the connected amplifier channels that use the same multi channel interface.

Make sure that all EOL and loudspeaker supervision boards that are connected via the basic amplifiers to the same multi channel interface have unique addresses.

Note

For the loudspeaker supervision board or EOL supervision board to work correctly it is necessary to set the amplifiers to 70 V or 100 V output. The 50 V setting is not allowed.

Because certification for the EN54-16 standard has only been performed on the 100 V output of the Praesideo amplifiers, the installer shall only use the 100 V outputs of Praesideo for emergency sound systems in Europe.

Bosch Security Systems 2011-02

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Bosch Appliances 3.5 manual Multiple loudspeaker line supervision, Power Amplifiers
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3.5 specifications

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