The sounder must only be installed by suitably qualified personnel in
accordance with the latest issues of the relevant standards.
8.2 Cable Selection and Connections
When selecting the cable size, consideration must be given to the input
current that each unit draws (see table 1), the number of sounders on the
line and the length of the cable runs. The cable size selected must have
the necessary capacity to provide the input current to all the sounders
connected to the line.
A single wire with a cross sectional area of up to 2.5mm² / AWG14 can
be connected to each terminal way or if an input and output wire is
required two wires can be connected to each terminal way when crimped
with a ferrule. If more than one wire is fitted into a terminal a ferrule should
be used to securethe wires. Whenconnecting wires to theterminals great
care should be taken to dress the wire so that when the cover is inserted
into the chamber the wires do not exert excess pressure on the terminal
blocks.
D1xL2 and D1xL1 8 ohm and 16 ohm low impedance loudspeakers have
dual input terminals on the PCB assembly for input and output wiring. A
cable of up to 4.0mm² can be connected to each terminal.
Wire insulation needs to be stripped 8mm. Wires may be fitted securely
with crimped ferrules. Terminal screws need to be tightened down with a
tightening torque of 0.45 Nm / 3.5 Lb-in.
Line In: 0.2 - 2.5mm2/ AWG24 - AWG14
Low Impedance: 0.2 - 4mm2/ AWG24 - AWG12
Figure 3: Wire Preparation.
When connecting wires to the terminals great care should be taken to
dress the wires so that when the cover is inserted into the chamber the
wires do not exert excess pressure on the terminal blocks. This is
particularly important when using cables with large cross-sectional areas
such as 2.5mm².
8.3 Earthing
Figure 4: Earth Locations.
8.4 Cable Glands, Blanking Elements & Adapters
Ingress Protection
Adapters
The D1x Loudspeaker range can be supplied with the following types of
adapters:
M20 to M25
It is important to note that stopping plugs cannot be fitted onto adapters,
only directly onto the M20 entries.
Any other adapters used must be suitably rated and certified.
