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Ambient Temp.
Min. Rating of cables
and cable glands
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.
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) AC Wiring
3-off 2-way terminal blocks are provided on the AC beacon
for power. There are 2-off Live, 2-off Neutral and 2-off Earth
terminals in total.
L
Fig. 4 E2XBL2 AC Terminals
Refer to schematic document D209-06-401 for further detail
on terminal connections.
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. D209-00-401-IS
40ºC
45ºC
50ºC
90ºC
95ºC
100ºC
N
E
Issue 1
55ºC
10) DC Wiring
105ºC
3-off 2-way terminal blocks are provided on the AC beacon
for power. There are 2-off +ve, 2-off –ve, 1-off Stage 2 and 1-
-off stage 3 terminals in total.
For further detail, refer to schematic document D209-06-401.
10.2
On E2xBL2 DC units, DC reverse line monitoring can be
used if required. All DC beacons 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:
24V DC
48V DC
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. 8a, 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. 8b.
A spacing of at least 1/16" (1.58mm) must be provided
through air and over surfaces between uninsulated live parts.
20-08-22
+ +
- -
Fig. 6 E2XBL2 DC Terminals
Line Monitoring
Min. Resistance
Min. Power
3.9KΩ
1KΩ
15KΩ
3.9KΩ
Fig. 8a End of Line Resistor Forming
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0.5W
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2W
Tel: +44 (0)208 743 8880
Sheet 4 of 5
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