Siemens FDOOT241-9 - Use of Unshielded Cables

Mounting / Installation
74
Building Technologies 007004_k_en_--
Fire Safety & Security Products 16.04.2009
5.13.2.1 Use of unshielded cables
Guideline
z The connection is established from base to base using twisted or non-twisted
wire pairs.
+
-
+
-
+
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+
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+
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LINE
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1
2
C
4
B
3
A
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Connection diagram for collective detector line with and without external alarm indicators
(without shielded cables)
1 Control panel 3 External alarm indicator DJ119x
2 Detector base FDB201/FDB201-AA,
FDB202
4 End-of-line depending on control
panel
Notes
z Standard wiring:
The external alarm indicator is connected to the positive and negative poles of
each detector.
z Wire-saving cabling:
The external alarm indicators are 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
each other detector (C).
The wire-saving cabling for external alarm indicators is not admissible for new
installations.