Siemens OH720 - Detector Heating Unit Connection

4BMounting / Installation
36BDetector heating unit FDBH291
5
51 |
64
Building Technologies
A6V10212047_m_en_--
Fire Safety
2015-05-04
5.12.2 Connection of the detector heating unit
● Connect the cables for the monitored supply from the control panel and the
detector heating unit to the supplied micro terminals DBZ1190-AA.
● The cables can be placed in the same cable harness as the detector line or
separately.
● Several detector heating units can be connected in parallel.
● Detector heating units require a separate supply.
NOTICE
Risk of icing
Malfunction
● To ensure smooth operation, the detector must be checked regularly for icing.
Figure 14: Connection diagram for detector heating unit FDBH291
1 Control panel supply (monitored) 2 Control panel
+
-
DBZ1190-AA
-
+
LINE
FDBH291
-
+
FDBH291
DBZ1190-AA
1
2
-
+
1a 1b
5 6
1a 1b
5 6
+
DB721
DB110xx
DB721
DB110xx