European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D211-00-651-IS
Issue 1
20-08-22
Sheet 4 of 8
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Minimum output of power supply =
Min. voltage at point of use + voltage drop
For ambient temperatures over +45ºC the cable entry
temperature may exceed +70ºC. Therefore suitable heat
resisting cables and cable glands rated to min. 95°C must be
used:
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.
8)
Cable Connections
Electrical connections are to be made into the terminal blocks
on the PCBA located in the enclosure. See section 6 of this
manual for access to the enclosure.
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 Live/Neutral or +/-
terminals 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 be tightened down
with a tightening torque of 0.56 Nm / 5 Lb-in. 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.
9)
Wiring
The Strobe is powered via factory installed wires connected to
the alarm horn. The wires connecting the alarm horn and
strobe can be removed if the user wishes to power the strobe
separately.
For further wiring schematics refer to document D211-06-651
10)
Earthing
The unit has both internal and external earth points, (please see
fig 2 & fig 4).
Internal earthing connections should be made to the internal
earth terminal on the PCBA, (please see fig 4). The earth
conductor should be at least equal in size and rating to the
incoming power conductors. The internal earth bonding wire
connects the PCBA earth terminal to the internal earth terminal
in the enclosure back box.
External earth connections should be made to the M5 earth stud
on the beacon housing, using a ring crimp terminal to secure the
earth conductor to the earth stud. The external earth conductor
should be at least 4mm
2
in size. The external earth crimp ring
should be located between the two M5 plain washers provided
and securely locked down with the M5 spring washer and M5
nut.
11)
End Of Line Monitoring
On DxC2XH1 & D2xC2XH2 units, dc reverse line monitoring
can be used if required. All units have a blocking diode fitted in
their supply input lines. An end of line monitoring resistor can be
connected across the +ve and –ve terminals. If an end of line
resistor is used it must have the following values:-
Min. Resistance
Min. Power
3.9KΩ
0.5W
1KΩ
2W
The resistor must be connected directly across the +ve and
-ve terminals of the sounder board only, as shown in the
following drawing. Whilst keeping its leads as short as possible,
a spacing of at least 1/16 inch (1.58mm) must be provided
through air and over surfaces between uninsulated live parts.
The resistor must be connected directly across the +ve and
-ve terminals as shown in the following drawing. Form the
resistor legs as shown in Fig. 5, remove the +ve and –ve
terminal plugs and fit the resistor across the two terminal plugs
before refitting them to the PCBA as shown in Fig. 6a & 6b. A
spacing of at least 1/16” (1.58mm) must be provided through air
and over surfaces between uninsulated live parts.
Fig. 5 End of Line Resistor Forming
Fig. 6a End of Line Resistor Placement - Beacon
End of Line Resistor
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Fig. 4 -
Terminals
