Siemens FS720 - Page 189

Installing,
exchanging and connecting modules
Module bus cards
7
189 |
248
Building Technologies
A6V10210390_m_en_
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Fire Safety
2018
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08
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29
Switching variants for monitored alarm and horn outputs with load
resistance monitoring (VdS)
Figure 109: Switching examples for monitored alarm and horn outputs with load resistance monitoring
(VdS)
Rload Load resistance Rx Additional load resistance
Rcable Line resistance * If necessary
* Adaptation of the load resistance.
You will find detailed information regarding the determination of the resistances for
the monitored outputs in the document Planning A6V10210362.
Switching for configurable inputs/outputs
Figure 110: Switching for relays
1 Configured as output
2 Configured as input
+
-
5
6
FireOutput2-
FireOutput2+ +
-
7
8
FireOutput1-
FireOutput1+
X11
Example horn output
Example alarm output
Rload
Rcable
Rload
Rcable
*
*
Rx
427V2
+
X11
1
0 V
-
X12
7
GPIO1
8
GPIO2
1
2
10k
10k
27V2
27V2