Term
Definition
Loudspeaker Line
Isolator with Housing
(PM1-LISS)
Referred to in this manual as “Isolator Board” - detects and isolates
line and loudspeaker faults.
Loudspeaker DC
Blocking Board (PM1-
LISD)
Referred to in this manual as “DC Blocking Board” - circuit board
that has the same connections as the Isolator Board, which allows
for quick and convenient connection of the loudspeaker loop and
tap-off connections.
Segment
The wire and/or group of loudspeakers between two Isolator
Boards and between the Master Unit and an Isolator Board.
Voice alarm zone
Geographical part of an evacuation zone in which an evacuation
alarm is carried out. Alarm zones are defined per installation.
Walk Test
Test mode for checking the loop by feeding the power and signal
from one side of the loop only.
Zone
An area where the same signal is broadcast that can be separately
addressed by the public address system.
Loudspeakers Line Isolator System
About this manual | en
9
Bosch Security Systems B.V.
Installation and Operation Manual
2014.03 | V1.1 |