Auxiliary Terminals Dbz1190-Aa/-Ab; Detector Lines; Connection Diagram, Addressed - Siemens OH720 Technical Manual

5.9.1 Auxiliary terminals DBZ1190-AA/-AB

5.10 Detector lines

5.10.1 Connection diagram, addressed

Building Technologies
Fire Safety
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 11: Detector base with connection terminals and micro terminals
See also
 Connection terminal DBZ1190-AB [➙ 30]
 Micro terminal DBZ1190-AA [➙ 29]
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.
4BMounting / Installation
34BDetector lines
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