E2S GNExB2LD2 User manual

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [email protected]m Tel: [phone]
www.e-2-s.com Fax: [phone]
Document No.D156-00-401-IS Issue 1 08-07-16 Sheet 1 of 5
INSTRUCTION MANUAL (ATEX
/ IECEx
)
GNExB2LD2 Flameproof LED Bea ons
For use in Flammable Gas and Dust Atmospheres
1) Introduction
The GNExB2LD2 are flameproof beacons which are certified
to meet the requirements of the ATEX directive 94/9/EC and
the IECEx scheme. The beacon produces synchronised
visual warning signals and can be used in hazardous areas
where potentially flammable gas and dust atmospheres may
be present. The GNExB2LD2 can be used in Zone 1 and
Zone 2 areas with gases in groups IIA, IIB and IIC and
Temperature Classifications of T1, T2, T3, T4, T5 & T6. The
unit can be used in Zone 21 and Zone 22 with dusts in
groups IIIA, IIIB and IIIC and have a surface temperature
rating of T85°C.
2) Marking
All units have a rating label, which carries the following
important information:-
Input Voltage: DC Units 24V
AC Units 230V or 115V
GNExB2LD2 Codes:
Ex db IIC Gb T6 Ta -50°C to +65°C
Ex db IIC Gb T5 Ta -50°C to +70°C
Ex tb IIIC Db T85°C Ta -50°C to +70°C
Certificate No. DEMKO 15ATEX1448X
IECEx UL15.0003X
“Warnings”
POTENTIAL ELECTROSTATIC CHARGING HAZARD
DO NOT OPEN WHEN AN EXPLOSIVE
ATMOSPHERE IS PRESENT
ALL ENTRIES M20 X 1.5
IF TEMPERATURE EXCEEDS 70ºC AT ENTRY OR 80ºC AT
BRANCHING POINT USE SUITABLE RATED CABLE AND CABLE
GLANDS
3) Type Approval Standards
The beacons have an EC Type examination certificate and
IECEx certificate of conformity issued by UL and have been
approved to the following standards:
EN60079-0:2012 / IEC60079-0:2011 (Ed 6): Explosive Atmospheres
- Equipment. General requirements
EN60079-1:2014 / IEC60079-1:2014 (Ed 7): Explosive Atmospheres
- Equipment protection by flameproof enclosures "d"
BS EN 60079-31:2014 / IEC 60079-31:2013 (Ed 2): Explosive
Atmospheres - Equipment dust ignition protection by enclosure "t"
4) Installation Requirements
The beacons must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards:
EN60079-14 / IEC60079-14: Explosive atmospheres - Electrical
installations design, selection and erection
EN60079-10-1 / IEC60079-10-1: Explosive atmospheres -
Classification of areas. Explosive gas atmospheres
EN60079-10-2 / IEC60079-10-2: Explosive atmospheres -
Classification of areas. Explosive dust atmospheres
The installation of the units must also be in accordance with
any local codes that may apply and should only be carried
out by a competent electrical engineer who has the
necessary training.
5) Zones, Gas Group, Category, IP Rating and
Temperature Classification
The units can be installed in locations with the following
conditions:
Area Classification Gas:
Zone 1 Explosive gas air mixture likely to occur in
normal operation.
Zone 2 Explosive gas air mixture not likely to occur,
and if it does, it will only exist for a short time.
Gas Groupings:
Group IIA Propane
Group IIB Ethylene
Group IIC Hydrogen and Acetylene
Temperature Classification:
T1 450ºC
T2 300ºC
T3 200ºC
T4 135ºC
T5 100ºC
T6 85ºC (up to 65ºC ambient)
Area Classification Dust:
Zone 21 Explosive dust air mixture likely to occur in
normal operation.
Zone 22 Explosive dust air mixture not likely to occur, and
if it does, it will only exist for a short time.
Dust Groupings:
Group IIIA Combustible Flyings
Group IIIB Non-conductive Dust
Group IIIC Conductive Dust
IP Rating: IP6X to EN/IEC60079-0 and IP66 to EN/IEC60529
Equipment Category: 2G/D
Ambient Temperature Range: -50°C to +70°C
Maximum Surface Temperature for Dust Applications:
85ºC
0518
I
I 2G
II 2D
Epsilon x
Equipment Group and
Category:
CE Marking
Notified Body No.

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [e-mail] Tel: [phone]
www.e-2-s.com Fax: [phone]
Document No. D156-00-401-IS Issue 1 08-07-16 Sheet 2 of 5
6) Beacon Location and Mounting
The location of the beacons should be made with due regard
to the area over which the warning signal must be visible.
They should only be fixed to services that can carry the
weight of the unit.
The beacons should be securely bolted to a suitable surface
using the 9.4mm diameter bolt holes in the base of the unit
(see figure 1).
7) Access to the Flameproof Enclosure
In order to connect the electrical supply cables to the beacon
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To access the Ex d chamber,
loosen the M4 grub screw on the beacon cover. Open the
enclosure by turning the beacon cover counterclockwise and
remove the cover, taking extreme care not to damage the
flameproof threads in the process (see figure 2).
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:
A supply voltage variation of +/-10% outside the voltage
range is permissible.
Nominal current at nominal voltage
Max rated current at worst case supply voltage and flash rate.
9) Cable Selection
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.
SAFETY WARNING: The cable entry temperature may
exceed +70ºC or the cable branching point temperature may
exceed 80ºC at high ambient temperatures and therefore
suitable heat resisting cables and cable glands must be used,
rated as follows:
10) Earthing
Both AC and DC beacon units can be connected to an earth.
The units are provided with internal and external earth
terminals which are both located on the terminal chamber
section of the unit (see figure 3).
Type No.
GNExB2LD2
F
lash
Mode
s
Nominal Current
Max
Current
Nominal
Voltage
Voltage
Range
Steady
High
Power
Steady
Low
Power
Flashing
1Hz
Over
voltage
range
24Vdc 18-54Vdc 240mA 134mA 110mA 336mA
115Vac 103.5-
126.5Vac
50/60Hz
95mA 78mA 90mA 124mA
230Vac 207-
253Vac
50/60Hz
48mA 37mA 45mA 83mA
Ambient
Temp. 45ºC 50ºC 55ºC 60ºC 65ºC 70ºC
Min. Rating of
cables and
cable glands
80ºC 85ºC 90ºC 95ºC 100ºC 105ºC
Flashdome
Guard
Flameproof
Lid Moulding
Flameproof
Chamber
External Earth
Stud
M4 x 12mm
Grub Screw
Lid Moulding
Figure 2
O-Ring
Figure 1

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [e-mail] Tel: [phone]
www.e-2-s.com Fax: [phone]
Document No. D156-00-401-IS Issue 1 08-07-16 Sheet 3 of 5
Internal earthing connections on AC units should be made to
the Internal Earth terminal on the PCBA. 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 M4
earth stud, using a ring crimp terminal to secure the earth
conductor to the earth stud between the two M4 stainless
steel flat washers, then reassemble the M4 spring washer
and tighten the M4 nut to ensure that the cable lug is secured
against loosening and twisting. The external earth conductor
should be at least 4mm
2
in size.
11) Cable Glands
The cable gland entries have an M20 x 1.5 entry thread. Only
suitably rated and ATEX / IECEx certified cable glands which
must be suitable for the type of cable being used.
When only one cable entry is used the other entries must be
closed with suitably rated and ATEX / IECEx certified
blanking plugs.
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.
12) Cable Connections
Electrical connections are to be made into the terminal blocks
on the PCBA located in the flameproof enclosure. See
section 7 of this manual for access to the flameproof
enclosure. A 6-way terminal blocks is provided on the AC
Beacon. There are 2-off Live, 2-off Neutral terminals and 2-off
Earth terminals in total. A 6-way terminal blocks is provided
on the DC Beacon. There are 2-off +ve, 2-off -ve terminals, 1-
off S2 (Stage 2) and 1-off S3 (Stage 3).
Wires having a cross sectional area of up 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. Terminal screws need to be tightened
down with a tightening torque of 0.45 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.
12.2 Stage Switching (DC Units Only)
12.2.1 Units First Stage Tones
Stage one (S1) Operation
Power +ve and –ve, link a -
ve supply line to the S2
terminal.
Dip switch alters stage 2
tone.
12.2.2 DC Units Second and Third Stage Tone
Selection
Stage two (S2) Operation
Power +ve and –ve, link
a -ve supply line to the
S2 terminal.
Dip switch alters stage 2
tone.
Stage three (S3) Operation
Power +ve and –ve, link
a -ve supply line to the
S3 terminal.
Dip switch alters stage 3
tone.
Figure 3
M20 x 1.5
Entries
External
Earth Stud
Internal
Earth Stud
DC Units
AC Units
S3 S2
-
-
+
+
E
E
N
N
L
L
DC Units
AC Units

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [e-mail] Tel: [phone]
www.e-2-s.com Fax: [phone]
Document No. D156-00-401-IS Issue 1 08-07-16 Sheet 4 of 5
13) Synchronised Operation
All GNExB2LD2 beacons that are connected to the same
supply line will have a synchronised flash rate at one flash
every second. To ensure that the units will be synchronised
check that the DIP switch is set to1 Hz (see Figure 4).
14) Flash Mode Settings (DC Only)
The GNExB2LD2 beacons can produce different flash
patterns as shown in Table 1. The flash patterns are selected
by operation of the flash setting DIP switch on the PCB, Fig
4.
Switch
Setting S1 Mode S2 Mode S3 Mode
(123456)
000000 Steady High Power Flashing 1Hz Flashing Triple Strike
000001 Steady Low Power Flashing 1Hz Flashing Triple Strike
100000 Flashing 1Hz Flashing Double Strike Flashing Triple Strike
101000 Flashing 1.5Hz Flashing 2Hz Flashing Double Strike
010000 Flashing 2Hz Flashing Triple Strike Flashing Triple Strike
110000 Flashing Double Strike Steady High Power Flashing Triple Strike
001000 Flashing Triple Strike Flashing 2Hz Flashing Double Strike
15 ) End of Line Monitoring (DC Units)
On the GNExB2LD2 DC beacons, dc reverse line monitoring
can be used if required. All DC units have a blocking diode
fitted in their supply input lines. An end of line monitoring
diode or an end of line monitoring resistor can be connected
across the +ve and –ve terminals in the flameproof chamber.
If an end of line resistor is used it must have a minimum
resistance value of 3k3 ohms and a minimum wattage of
0.5W or a minimum resistance value of 500 ohms and a
minimum wattage of 2W.
16 ) Interchangeable & Spare Parts
The beacon lenses are interchangeable, contact European
Safety Systems Ltd for a replacement lens available in
various colours.
The guard is an integral part of the protection and must be
reassembled exactly the same way as it was disassembled.
To change the lens, unscrew and remove the M5 socket
head screws, M5 spring & flat washers.
Remove the guard.
Replace the old lens with the new lens.
Fit the guard back on to the lens and moulding, align the
holes of the guard, lens and casting. To reattach the lens, the
fixings MUST be in the order shown in figure 6.
Fig 9. Lens & Guard fixings order
Example
shown:
100000 =
Flashing 1Hz
M5x16 Hex
Socket Screw
Old Lens
New Lens
M5x16 Hex Socket Screw
M5 Spring Washer
M5 Plain Washer
Guard
Lens
Figure 4
Figure 5
Figure 6
Table 1

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [e-mail] Tel: [phone]
www.e-2-s.com Fax: [phone]
Document No. D156-00-401-IS Issue 1 08-07-16 Sheet 5 of 5
17 ) Maintenance, Overhaul and Repair
Maintenance, repair and overhaul of the equipment should
only be carried out by suitably qualified personnel in
accordance with the current relevant standards:
EN60079-19/IEC60079-19 Explosive atmospheres - Equipment
repair, overhaul and reclamation
EN 60079-17/IEC60079-17 Explosive atmospheres - Electrical
installations inspection and maintenance
Units must not be opened while an explosive atmosphere is
present.
Electrostatic charging hazard - Clean only with a damp cloth.
18 ) Adapter Options
The GNEx 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.
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.
19) Special Conditions of safe use
The enclosure is non-conducting and may generate an
ignition-capable level of electrostatic charges under certain
extreme conditions. The user should ensure that the
equipment is not installed in a location where it may be
subjected to external conditions that might cause a build-up
of electrostatic charges on non-conducting surfaces.
The stainless steel beacon guard is not earthed and may
generate an ignition-capable level of electrostatic charges. It
has a capacitance of 10pF according to EN/IEC60079-0,
clause 7.5.
The flashdome guard must not be removed from the unit at
any time whilst in service.