Connection To A Collective Detector Line - Siemens FDL241-9 Mounting, Commissioning

3.3.2 Connection to a collective detector line

3.3.2.1 Use of unshielded cables
A6V10332811_e_en_--
3. Connect each of the two negative poles of the external alarm indicator
separately to both negative poles of the detector line.
The two negative connections of the external alarm indicator are decoupled
externally in the alarm indicator by diodes.
4. Connect the shielding of the detector line with the shielding of the connection
cable to the external alarm indicator with an auxiliary terminal DBZ1190-xx.
Connect a control panel-specific end-of-line to the end of the collective detector
line.
The connection is established from base to base using twisted or non-twisted wire
pairs.
LINE
_ _ _
+ + +
+
1
-
A
Figure 14: Connection diagram for collective detector line with and without external alarm indicators
(without shielded cables)
1 Control panel
2 Detector
Standard circuitry
With standard circuitry, the external alarm indicator is connected to the positive and
negative poles of each detector.
Wire-saving cabling
NOTICE
Cabling for new sites
Wire-saving cabling in external alarm indicators is prohibited for new sites.
With wire-saving cabling, the external alarm indicator is connected as follows:
● The external alarm indicator must be connected to the positive and negative
poles of at least one detector (A).
● The external alarm indicator must be connected to the positive pole of every
other detector (B).
● The external alarm indicator need not be connected to the negative pole of
every other detector (C).
LINE
2
_ _
+ + +
LINE
B
3
3 External alarm indicator
4 End-of-line depending on control
panel
Mounting / Installation
Electrical connection
LINE
_ _
+ +
4
3
_ _
+
C
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