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European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: +44 (0)208 743 8880 www.e2s.com Fax: +44 (0)208 740 4200
Document No. D199-00-411-IS-SC Issue 4 24-02-2021 Sheet 3 of 6
Fig. 2: Accessing the Explosion proof Enclosure
On completion of the installation the flameproof threaded joint
should be inspected to ensure that they are clean and that
they have not been damaged during installation. Flameproof
threaded joints are not intended to be repaired. Also check
that the ‘O’ ring seal is in place. When fitting the flameproof
cover ensure the thread is engaged correctly. Fully tighten
the cover all the way, ensure no gap is visible between the
cover and base of the beacon enclosure. Tighten the M4
grub screw.
8) Power Supply Selection
It is important that a suitable power supply is used to run the
beacons. The power supply selected must have the
necessary capacity to provide the input current to all of the
beacons
The following table shows the input current taken by the
various beacons:
The equipment has been tested for supply voltage variation
of -30% / +25% according to DNVGL-CG-0339.
9) 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 above),
the number of beacons 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 beacons
connected to the line.
For ambient temperatures over +40ºC the cable entry
temperature may exceed +70ºC and therefore suitable heat
resisting cables and cable glands must be used as per table
below
STExB2LD2
Ambient
Temp. 45ºC 50ºC 55ºC 60ºC 65ºC 70ºC
Min. Rating of
cables and
cable glands
85ºC 90ºC 95ºC 100ºC 105ºC 110ºC
The cable entries have an M20 x 1.5 – 6H entry thread. If the
installation is made using cable glands, only suitably rated
and ATEX / IECEx certified cable glands must be used. They
must be suitable for the type of cable being used and also
meet the requirements of the current installation standards
EN 60079-14 / IEC60079-14.
Any unused cable entries must be closed with suitably rated
and ATEX / IECEx certified blanking plugs.
If the installation is made using conduit, openings must have
a sealing fitting connected as close as practical to the wall of
the enclosure, but in no case more than the size of the
conduit or 50mm, whichever is the lesser.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable glands
or blanking plugs. A minimum ingress protection rating of
IP6X must be maintained for installations in explosive dust
atmospheres.
For combustible dust applications, the cable entry device and
blanking elements shall be in type of explosion protection and
shall have an IP 6X rating.
The STEx Beacon Range can be supplied with the following
types of adapters:
M20 to ½” NPT
M20 to ¾” NPT
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 ATEX /
IECEx certified adapters.
10) Earthing
Both AC and DC beacon units must be connected to an earth
according to EN/IEC 60079/14. The units are provided with
internal and external earth terminals which are both located
on the terminal chamber section of the unit
Internal earthing connections should be made to the Internal
Earth terminal in the base of the housing using a ring crimp
terminal to secure the earth conductor under the earth clamp.
The earth conductor should be at least equal in size and
rating to the incoming power conductors.
External earthing connections should be made to the M5
earth stud, using a ring crimp terminal to secure the earth
conductor to the earth stud. The external earth conductor
should be at least 4mm² in size.
Type No.
STExB2LD2
Flash Modes
Nominal Current
Nominal Voltage Steady High
Powe
Steady Low
Powe
Flashing
1Hz
24Vdc 240mA 134mA 110mA
M4 x 12mm
Grub Screw
Lid
Moulding
O-Ring
