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6.1 Protection elements
6.2 Supply concept
Building Technologies
Fire Safety
Electro-magnetic influence and over-voltages may lead to faults in the fire
detection installation. Protection elements minimize these faults.
All stations are equipped with fine protection and EMC filters in the factory. This
applies to the components listed below:
●
All inputs and outputs
●
All lines leading away from the stations
If need be, protection elements for primary and intermediate protection must be
added by the costumer. These elements must be mounted at the zone limits (EMC
zone), not inside the stations.
Other possible measures by the customer
In installations that are especially endangered by lightning, surge protectors must
be installed. In case of excessive HF mains overlapping, mains filters must be
installed in the feed line.
Installation
Twisted cables are recommended for external supply lines and lines leading to
alarm devices.
The following table shows which types of energy supply are possible with the
FC721.
Use
FC721
AC 230 V + batteries Standard
AC 230 V
Possible
2x DC 24 V
No
1x DC 24 V
No
The following chapters describe the individual energy supplies in more detail.
Installation
6
Protection elements
43 | 118
A6V10211100_f_en_--
2015-12-15
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