Chapter 2: Installation and assembly
LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook 27
• All cables (power and signal) should pass through the screw-in metal cable
glands provided. The screen of the power cable should be terminated at the
cable gland.
• Power cables need to be fitted with a ferrite ring inside the detector case (two
are provided). The 24V and 0V wires should be long enough to form a loop
around the ferrite wall.
• Separate wires from the power cables should be kept as short as possible,
just enough to provide adequate stress relief.
Figure 16 and Figure 17 show the proper arrangement of top and rear entry
power cables.
Figure
16
: Top power cable arrangement
(1) Cable screen
(2) Cable gland
(3) Ferrite
(4) Earth stud
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