Bosch Security Systems | 2006-06 | 9922 141 10377 en
Plena Voice Alarm System | Installation and User Instructions | Configuration en | 79
18.11.3 Short-circuit supervision
If line supervision is switched on, the voice alarm
controller continuously monitors all loudspeaker lines in
the system for short-circuits.
If a short-circuit is detected, the line output of the short-
circuited line is isolated and shut down within 200 ms.
The system will remain operational. If the line is dual-
redundant connected (A and B), the short-circuited line
remains operational as well.
When a ground short occurs, first check the 0 V and
100 V connections from the amplifier to the Voice
Alarm Controller. If these connections are incorrect,
then a short fault can occur at unpredictable times.
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