Planning
ASD 531, Technical description, T 140 416 en
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4.8
Electrical installation
4.8.1
Installation cable requirements
The supply line from the FACP to the detector housing is defined by the line and FACP technology in use.
Cables with twisted pairs are to be used as a matter of principle. With 4-wire and multi-wire cables, twin- or quad-twist cables
are to be used.
Laying the voltage supply line and line in parallel is permitted.
A separate wire pair is to be used for the ASD 531 voltage supply.
The electrical installation is usually performed with commercially available cables. Depending on the country of use, special
fire detector cable may be required by the relevant authorities. The relevant country-specific authorities should therefore be
consulted concerning the required cable types.
The installation cable must have a minimum wire diameter of 0.8 mm (0.5 mm²).
Please refer to Sec. 4.8.2 for determining
the exact maximum cable length and the required cable cross-section.
Danger
For safety reasons (EN 54) individual cables must be used for the outbound and return lines for addressable loop
technologies.
Further, the
manufacturer’s specifications for the FACP
concerning maximum
line length
,
cable type
,
shielding
etc. of the addressable loop technology
must be observed
.
The order separation and installation type are also subject to country-specific guidelines and regulations.
The electrical installation of the ASD 531 can normally be performed without screening. Screening of the installa-
tion is required wherever EMC influences are to be expected. In the following environments disturbance variables
can be expected and the installation must be provided with screening accordingly:
In and around transmitter and radio facilities. Near high-voltage and low-voltage installations with high energy. In
areas with EMC field intensities in excess of 10 V/m In cable ducts and vertical shafts together with high-energy
cables In areas with high-energy devices and installations (generators, power plants, railway facilities, X-ray
equipment, etc.). Outside buildings.
If screening is used, the cable screening in the ASD 531 is to be connected to an additional support terminal. The
cable screening must
not
be connected to the minus or
ground
terminal of the AMB 31.
