Connections to Detectors
Connecting Loop Units, Interactive Fire Detection Systems, 116-P-CONNECTLOOPUNIT/DGB 2007-10-10,
Autronica Fire and Security AS
Page 5
2.3 Connection of Branch-off
If necessary, a branch-off can be connected to a detection loop if the
existing cable layout requires this, but this is not recommended, as the
safety will be reduced.
To ensure a correct addressing of the detectors on a branch-off when
configuring the system, there can not be more than one branch-off per
detector. For safety reasons, the number of detectors on each branch-
off must be kept to a minimum, as the detectors on a branch-off will
not operate in case of a break or shortcircuit on the branch-off. The
absolute maximum number of detectors on a branch-off (or an open
loop) is 32.
Accepted
NOT Accepted!
Loop Loop
Branch-off
Branch-off
Branch-off
Input
Output
+
-
+
-
1 - IN
2 - OUT
3 + COMMON
4 - LED
Main Loop
Branch-off
Next detector on
branch-off
NOTE:
Always connect a
branch-off to terminal
2 (-) and 3 (+).
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