Bosch PRAESENSA, Installation Manual

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PRAESENSA Amplifier, 600W 8-channel | PRA-AD608 | en 89
Bosch Security Systems B.V. Installation manual 2019.11 | V1.00 |
2. Insert each wire into the appropriate slot of the connector C. The wiring order is not
critical, but use the same order for all lifeline cables in the system to minimize the risk of
errors.
–
Use a flat blade screwdriver to tighten each connection.
3. Insert the cable connector into the amplifier's lifeline socket, cut the cable to length and
mount a connector of the same type, delivered with the multifunction power supply to
the other end of the cable, observing wiring order. Insert this connector into the lifeline
socket of the multifunction power supply.
Notice!
The lifeline connection may not be longer than 3 m.
9.5.5 Amplifier outputs
The amplifier provides eight output channels and a spare channel that substitutes a failing
channel.
The channels have direct drive 70/100
V outputs for low distortion, low crosstalk and a wide
audio bandwidth. There are no output transformers that would be a limiting factor for the
output power of each channel. Every channel also has a load independent flat frequency
response. This combination of features makes it possible to partition the available amplifier
power across all channels and utilize that power effectively.
Every channel has a 4‑pole connector socket, providing independently switched loudspeaker
group A and group B outputs. It supports three different loudspeaker connection topologies,
configurable in the system configuration:
!
Caution!
For compliance to UL 62368‑1 all loudspeaker wiring must be Class 2 (CL2); this requirement
does not apply for compliancy to EN/IEC 62368‑1.
!
Caution!
Amplifier outputs may carry output voltages up to 100 VRMS. Touching uninsulated terminals
or wiring may result in an unpleasant sensation.
Notice!
Only amplifier channel 1 and the spare channel are capable of delivering up to 600 W
maximum. All other channels are limited to 300 W maximum. In practice this does not impose
any limitation on the flexibility of partitioning the total amplifier power across the channels,
because if there is one zone with more than 300
W load, which is connected to channel 1, no
other channel can be loaded with more than 300 W anymore without exceeding the total
maximum of 600 W.