Use Of Shielded Cables - Siemens FDOOT221 Technical Manual

5.19.5.2 Use of shielded cables

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Building Technologies
Fire Safety
The shielding of the SIGMALOOP detector line must be connected in the base
adapter to auxiliary terminals DBZ1190-xx.
If a shielded cable is used, there are two possible ways of connecting external
alarm indicators:
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4
Connection diagram for SIGMALOOP detector line with and without external alarm indicators (with
shielded cables)
1 Control panel
2 Base adapter FDB241
Variant A:
1. Connect the positive pole of the external alarm indicator to the positive pole for
the alarm indicator on the detector.
2. Connect the negative pole of the external alarm indicator to the negative pole
for the alarm indicator on the detector.
3. Connect the shielding of the connection cable between the alarm indicator and
detector on the detector side to the positive pole for the external alarm indicator
via a DBZ1190-xx auxiliary terminal.
Variant B:
1. Connect the positive pole of the external alarm indicator to the positive pole for
the alarm indicator on the detector.
2. Leave the negative pole for the alarm indicator on the detector unoccupied.
3. Connect the negative pole of the external alarm indicator to the negative
terminal on the input side of the SIGMALOOP detector line on the detector via
a DBZ1190-xx auxiliary terminal.
4. Connect the shielding of the SIGMALOOP detector line to the shielding of the
connection cable for the external alarm indicator via a DBZ1190-xx auxiliary
terminal.
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A
4BMounting / Installation
49BDetector lines
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B
3 Auxiliary terminals DBZ1190-xx
4 External alarm indicator
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2015-11-04