Siemens FDOOT221 Technical Manual page 91

Building Technologies
Fire Safety
Variant A
1. Connect the positive pole of the external alarm indicator to the positive pole for
the external alarm indicator on the detector.
2. Connect the negative pole of the external alarm indicator to the negative pole
for the external alarm indicator on the detector.
3. Connect the shielding of the connection cable between the external alarm
indicator and detector on the detector side to the positive pole for the external
alarm indicator via an auxiliary terminal DBZ1190-xx.
Variant B
NOTICE
No approval
Without the base adapter, the connection according to variant 'B' is not permitted
for FDOOT241-A9.
For FDOOT241-A9, the base adapter FDB229 must be used.
1. Connect the positive pole of the external alarm indicator to the positive pole for
the external alarm indicator on the detector.
2. Leave the negative pole for the external alarm indicator on the detector
unoccupied.
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.
Mounting / installation
Detector lines
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