4BMounting / Installation
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2015-11-04
5.19 Detector lines
General cabling information
● Preferably, twisted and non-shielded cables should be used. This also applies
to connecting the external alarm indicators.
● Shielded cables are only required in special cases, such as strong high-
frequency fields.
See also
Detector lines [➙ 120]
5.19.1 Connection diagram for FDnet detector line
The following applies to FDnet detector lines:
● Loops, stubs and T-branches are possible.
● You may only connect external alarm indicators to one detector.
● Permissible cables for detectors with more than one external alarm indicator in
the collective, AnalogPLUS, and SIGMALOOP connection diagrams may be
migrated to the FDnet without any changes.
● Note document 001508 for installation (calculation of the capacity layer).
See also
Applicable documents [➙ 9]
5.19.1.1 Use of unshielded cables
The connection is established from base to base using twisted or non-twisted wire
pairs.
Connection diagram for addressed detector line with and without external alarm indicators (without
shielded cables)
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Control panel 3 Auxiliary terminals DBZ1190-xx
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Detector bases FDB221/FDB221-AA, FDB222 4 External alarm indicator
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