Bosch PAVIRO PVA-4CR12 - Page 21

PAVIRO Controller Connection | en 21
Bosch Security Systems
User manual
2022-11 | 07 | F01U306900
About the cable diameter
The voltage drop over cables should not exceed 10 %.
Cables with a higher voltage drop lead to a high proportional cable attenuation at the
loudspeakers. This is particularly noticeable at higher volume levels, for example alarm signals.
A high voltage drop can also cause communication problems with the EOL modules.
The following table gives an overview of the maximum cable lengths for different speaker
loads depending on the cable diameters.
Cross-
section
[mm2]
Diameter
[mm]
10 W
[m]
20 W
[m]
100 W
[m]
200 W
[m]
300 W
[m]
400 W
[m]
500 W
[m]
0.5 0.8 1000 800 160 80 53 40 32
0.75 1.0 1000 1000 240 120 80 60 48
1.0 1.1 1000 1000 320 160 107 80 64
1.5 1.4 1000 1000 480 240 160 120 96
2.5 1.8 1000 1000 800 400 267 200 100
4.0 2.3 1000 1000 1000 640 427 320 256
Maximum loudspeaker load
The maximum rated power should not exceed 500W per amplifier channel and/or controller/
router output (see chapter 6.1.2.). The internal 2-in-6 router output block offers the possibility
to distribute the 500W amplifier power to 6 zones. If two 500-watt amplifier channels are
used within a router cluster of 6 zones, up to 1000 W can be distributed to these 6 zones. The
maximum rated power of 500W at a single speaker output must not be exceeded.
Danger!
It is possible that during operation shock hazard voltages (> 140V peak value) may be
present at the outputs. Therefore, the connected loudspeaker zones have to be installed in
accordance with applicable safety regulations. When installing and operating 100V
loudspeaker networks, compliance with the VDE regulation DIN VDE 0800 is mandatory.
Especially, when 100V loudspeaker networks in alarm system applications are concerned, all
safety precautions have to be in accordance with the safety class 2 wiring.
Note: The breakdown voltage on the loudspeaker output from a controller/router (HW: 2.00) is
120V between the loudspeaker cable pairs and 60V between a loudspeaker cable pole and
ground.
Wiring faults
Loudspeaker cables, which typically run through the entire building, are more sensitive to
wiring faults.
There are different types of wiring faults as mentioned below:
– Ground fault: A ground fault is detected by the ground fault detection. If the resistance
between ground and speaker wire is < 50kΩ, a ground fault is indicated.
– Short circuit or open line: A cable that is short-circuited or open is detected by the built-
in impedance measurement, if the reference values are set correctly.