Siemens OOH740 - Detector Lines and Wiring Diagrams; Addressed Detector Line Wiring

Mounting / Installa
tion
Detector lines
5
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Building Technologies
A6V10305793_m_en_
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Fire Safety
2016-02-15
5.9.1 Auxiliary terminals DBZ1190-AA/-AB
Use the following auxiliary terminals for multiple connections:
● DBZ1190-AB connection terminal 1…2.5 mm²
● DBZ1190-AA micro terminal 0.28…0.5 mm²
Figure 18: Detector base with connection terminals and micro terminals
5.10 Detector lines
5.10.1 Connection diagram, addressed
Cables and topology
● The connection is established from base to base using twisted or non-twisted
wire pairs.
● Wherever possible use twisted, unshielded cables.
● Shielded cables are only required in special cases, such as strong high-
frequency fields.
● You have the option of using the following types of line:
– Loops
– Stub lines
– Stub line as a branch of a loop
Connecting external alarm indicators FDAI91 / FDAI92 / FDAI93
Observe the following points when connecting external alarm indicators:
● Wherever possible use twisted, unshielded cables.
● Connect a maximum of two external alarm indicators to one detector.
● If a cable with shielding is used to connect the external alarm indicator, this
shielding must be linked to the shielding of the detector bus.
The shielding must not be linked to the external alarm indicator itself.