e1453b
16
Fire & Security Products
Siemens Building Technologies Group
12.2001
2.2.3
Wiring for damp environments
Equipment which is mounted in damp rooms must be provided with special cable entries
(screwed cable glands). Suitable adapter bases are available for this purpose.
Example:
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
ÍÍÍÍÍÍÍÍÍÍÍÍÍ
Fig. 14
Water-tight cable entry using adapter base and screwed cable gland
2.2.4
Line terminal
The DS11 base contains spring terminals. To ensure good contact, only one wire must be
connected per terminal. Auxiliary terminals are available for multiple connections. (see
connection diagram on product enclosure sheet.)
2.2.5
Earth connection
The control unit and terminal with power supply must be earthed according to local regu-
lations.
The other equipment in a normal fire detection system does not require an earth con-
nection.
Shielded cables must be earthed in a star-pattern at one point (control unit). Shielding
must be through-connected in all equipment using insulated auxiliary terminals. Shield-
ing must not come into contact with any external earth potential or metal parts of the
equipment.
Equipment for explosion-hazard areas must be installed and earthed according to docu-
ment e1204, «Fire detection in explosion-hazard areas».
