System behavior
The following tables describe the system behavior of the Loudspeakers Line Isolator System.
This behavior can vary depending on the selected installation option (for more information,
see Installation options, page 20). All fault reporting is non-latching.
Fault condition: main loudspeaker loop
System behavior
Open circuit
–
The system detects a loop fault. The fault
is reported within the fault reporting time
of 90 seconds.
–
No interruption of audio.
–
After resolution of the fault, the fault
recovery time is < 100 seconds.
Short circuit
–
The system detects a loop fault. The fault
is reported within the fault reporting time
of 90 seconds.
–
The yellow LED indicator is lit on the
Isolator Board, indicating that the
adjacent segment has a short circuit.
–
Interruption of audio within the fault
isolation time. Audio returns to the
unaffected segments and the
loudspeakers connected to the tap-offs of
the Isolator Boards.
–
Loss of audio in the segment with the
short circuit.
–
After resolution of the fault, the fault
recovery time is < 100 seconds.
–
During loop recheck audio artifacts may
occasionally be heard.
Short circuit inside a loudspeaker (after a
DC Blocking Board)
–
The system does not detect a loop fault.
–
Loss of audio in the affected speaker.
3.3
14
en | System overview
Loudspeakers Line Isolator System
2014.03 | V1.1 |
Installation and Operation Manual
Bosch Security Systems B.V.