Use Of Unshielded Cables - Siemens FDOOT221 Technical Manual
Automatic fire detectors
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Also See for FDOOT221:
- Technical manual (138 pages) ,
- Building technologies (6 pages) ,
- Manualline (24 pages)
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5.16.2.1
Building Technologies
Fire Safety
Use of unshielded cables
The connection is established from base to base using twisted or non-twisted wire
pairs.
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Connection diagram for collective detector line with and without external alarm indicators
(without shielded cables)
1 Control panel
2 Detector base
FDB201/FDB201-AA, FDB202
Standard circuitry
With standard circuitry, the external alarm indicator is connected to the positive and
negative poles of each detector.
Wire-saving cabling
NOTICE
No approval
Wire-saving cabling in external alarm indicators is prohibited for new sites
For FDOOT241-A9, the base adapter FDB229 must be used.
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).
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LINE
B
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3 External alarm indicator
4 End-of-line depending on control
panel
Mounting / installation
Detector lines
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01.07.2012
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