Siemens FS720 Mounting & Installation page 160

Installing, exchanging and connecting modules
6
Module bus cards
160 | 222
Building Technologies
Fire Safety
Switching variants for monitored alarm and horn outputs with load
resistance monitoring (VdS)
X11
FireOutput2-
FireOutput2+
FireOutput1-
FireOutput1+
Figure 90: Switching examples for monitored alarm and horn outputs with load resistance monitoring
(VdS)
Rload Load resistance
Rcable Line resistance
* 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
27V2
X11
0 V
27V2
10k
GPIO1
X12
27V2
10k
GPIO2
Figure 91: Switching for relays
1 Configured as output
2 Configured as input
Example horn output
- 8
Rload
Rcable
+ 7
- 6
+ 5
Rx Additional load resistance
* If necessary
1
+
4
-
1
2
7
8
* *
Rx
Example alarm output
Rload
Rcable
A6V10210390_j_en_--
2015-12-15