Location And Mounting; Cable Connections - E2S D2xC2LD3 Instructions/Service Manual

4)

Location and Mounting

The location of the combined alarm horn and beacon should
be made with due regard to the area over which the warning
signal must be visible and audible. It should only be fixed to
services that can carry the weight of the unit.
DxC2 Alarm Horn and Strobe to a flat surface via the two 9.7
x 6.7mm, 147mm pitch fixing holes in the mounting feet of the
sounder section and the two 7mm fixing holes in the feet of
the base.
The equipment is not to be mounted with the horn facing
upwards.
165,6mm [6,46in.]
147,0mm [5,73in.]
Ø6,9mm [Ø0,27in.]
116,0mm [4,52in.]
Fig. 1 Fixing locations.
5)
Access to the Enclosure
Warning – High voltage may be present,
risk of electric shock. DO NOT open when
energised, disconnect power before
opening.
Warning – Hot surfaces. External surfaces
and internal components may be hot after
operation, take care when handling the
equipment.
To access the enclosures, loosen the four M4 posi pan head
screws of the beacon and loosen the four M4 posi pan head
screws of the sounder and withdraw the covers.
Beacon
Cover
M4 Screws
(4-off)
Fig. 2 Accessing the Enclosures.
To replace covers, check that the 'O' ring seals are in place.
Carefully push the covers in place. Insert M4 screws with fibre
washers and tighten to 3Nm torque.
__________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. D211-00-671-IS
125,0mm [4,88in.]
9,7mm [0,38in.]
168,0mm [6,55in.]
Sounder
Cover
M4
Screws
(4-off)
Issue: A 29-11-19
6)
Selection of Cable, Cable Glands, Blanking
Elements & Adapters
When selecting the cable size, consideration must be given to
the input current that each unit draws (see Table 1), the number
of units 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 of the sounders connected to the line.
When selecting the cable size consideration must be given to
the voltage drop over the length of the cable run to ensure the
min. input voltage at the point of use (voltage range, see section
13)
The voltage drop depends on:
- The total current draw of the devices installed on this
cable run
- The wire size and total length of the cable run,
determining the total resistance of this cable run
- The minimum output voltage supplied by the power
supply
The voltage drop and input voltage at the point of use can be
calculated as follows:
Total Wire resistance =
Wire resistance / 1000ft x length of cable run x 2
(length of cable run needs to be multiplied by two to account for
two wires going to and from the unit)
Total current draw =
Current draw per unit x number of units
Voltage Drop = Total current draw x Total wire resistance
Minimum output of power supply =
Min. voltage at point of use + voltage drop
The entries are available as one of the following options:
2-off M20 x 1.5 thread & 1-off ¾" NPT thread;
2-off ½" NPT thread & 1-off ¾" NPT thread
If a high IP (Ingress Protection) rating is required then a suitable
sealing washer must be fitted under the cable glands or
blanking plugs.
For use in explosive dust atmospheres, a minimum ingress
protection rating of IP6X must be maintained.
For use in explosive gas atmospheres, a minimum ingress
protection rating of IP54 must be maintained.
NPT plugs should be greased before insertion.
7)

Cable Connections

Electrical connections are to be made into the terminal blocks
on the PCBAs located in the enclosures. See section 5 of this
manual for access to the enclosures.
The Sounder and Beacon are supplied connected by default. In
order to power the beacon and sounder separately, the link
wires between the units must be disconnected.
Wires having a cross sectional area between 0.5 mm² to
2.5mm² can be connected to each terminal way. If an input and
output wire is required the 2-off +/- terminals of the beacon or 3-
off +/- terminals of the sounder can be used. If fitting 2-off wires
to one terminal way the sum of the 2-off wires must be a
maximum cross sectional area of 2.5mm². Strip wires to 8mm.
Wires may also be fitted using ferrules. Terminal screws need to
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