General System Requirements; Plena Vas System Requirements - Bosch PM1-LISM6 Installation And Operation Manual

Loudspeakers Line Isolator System
4.2.1

General system requirements

Make sure the following general system requirements are observed:
The maximum loudspeaker load of a loop is 500 watts.
The overload power setting of the Isolator Board must not be larger than 25% of the
amplifier power to that loop.
The maximum cable length is 1000 m (3281 ft) per loop.
The public address system is a 100 volt constant voltage system (e.g. Bosch Plena, Bosch
Praesideo).
The power consumption of the loudspeakers is between 0 and 100 watts.
The ground connections between system components is securely made.
4.2.2

Plena VAS system requirements

Make sure the Plena VAS system conforms to the following requirements:
The Plena VAS system is correctly configured and installed, according to the Installation and
User Instructions.
The Plena VAS system is setup as a two-channel system.
One router is connected to one Master Unit. To ensure for correct ground short detection,
do not connect zones from one router to more than one Master Unit or vice versa (this also
applies to the router inside the Voice Alarm Controller).
Each router has a set of amplifiers for music and calls. To ensure for correct ground short
detection, do not connect an amplifier to more than one router.
To ensure correct ground short detection on the Master Unit, the ground short slave switch
on one connected loop is set to off, and the ground short slave on the other loops is set to
on.
Each zone output is connected to one loop input.
The fault outputs of the Loudspeakers Line Isolator System are connected to the input
triggers of the Plena VAS system. Each loop fault output can be individually connected to the
Plena VAS system, or all fault outputs can be connected in series.
On the Master Unit, the general fault output is connected in series with the master loop fault
outputs. The general fault output is a normally energized fail-safe relay.
The chosen contact inputs on the voice alarm system are configured as fault input with the
description "EOL + ground short". The Plena VAS system will then indicate a zone fault and a
ground short simultaneously.
The output contacts of the Loudspeaker Line Isolator System Master will distinguish
between loudspeaker line failures and a ground short.
The short circuit check in Plena VAS is switched off.
The ground short detection in Plena VAS is switched off.
The Plena VAS system has software version 3.00.03 or higher.
The Plena VAS system has hardware version 3.0 or higher.
Bosch Security Systems B.V. Installation and Operation Manual
Planning | en 17
2014.03 | V1.1 |