Protective Cages; Mounting Of The Protective Cages; Grounding Of The Emc-Protective Cage Fdbz294 - Siemens FDOOT221 Technical Manual

5.18 Protective cages

5.18.1 Mounting of the protective cages

5.18.2 Grounding of the EMC-protective cage FDBZ294

Building Technologies
Fire Safety
Protective cage DBZ1194 protects the detector against mechanical damage.
EMC-protective cage FDBZ294 protects the detector against mechanical damage
and electromagnetic fields.
The protective cages can only be installed on the base attachment wet FDB295.
Mounting of the protective cages
1 Base attachment
2 Break out and screw protective cage on
firmly
3 Protective cage
The EMC-protective cage must be connected to the shielding of the detector line
cable at the flat plug.
If the detector line cable is not shielded then the EMC-protective cage must be
grounded using a separate cable.
For optimum grounding in the presence of powerful electromagnetic fields, the
ground line must be shorter than 10 m and have a cross section of at least
1.5 mm .
2
See also
 Mounting of the protective cages [➙ 97]
4BMounting / Installation
48BProtective cages
4 Flat plug 6.3 x 0.8 mm
5 EMC-protective cage
5
97 | 138
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2015-11-04