E2S GNExS2 User manual

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH sale[email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D157-00-001 Issue 5 25-06-2020 Sheet 1 of 7 (1)
INSTRUCTION MANUAL (ATEX / IECEx
)
GNExS2 and GNExS1 Flameproof Sounders
1) Introduction
The GNExS2 and GNExS1 are flameproof sounders which
are certified to meet the requirements of the ATEX directive
94/9/EC and the IECEx scheme. The sounders produce loud
warning signals and can be used in hazardous areas where
potentially flammable atmospheres may be present. Sixty-
four different stage alarm sounds can be selected by internal
switches to independently set the first stage and second
stage, the third and fourth stages are externally changed (see
tone table on Page 5/6). The GNExS2 unit produces output
levels in the 117dB (A) range and the GNExS1 unit produces
output levels in the 110dB (A) range.
The sounders are Group II, EPL (equipment protection level)
Gb. Dependant on unit type and ambient temperature the
equipment is certified ‘Ex db IIC Gb’ and as such may be
used in Zones 1 and 2 with flammable gases and vapours
with apparatus groups IIA, IIB & IIC and temperature
Classifications of T1, T2, T3 and T4 dependant on ambient
temperature, see marking codes in section 2.
The equipment is also certified ‘Ex db IIB Gb’ and as such
may be used in Zones 1 and 2 with flammable gases and
vapours with apparatus groups IIA & IIB and temperature
Classifications of T1, T2, T3, T4, T5 and T6 dependant on
ambient temperature, see marking codes in section 2.
2) Marking
All units have a rating label, which carries the following
important information:-
Unit Type No. GNExS2 or GNExS1
Input Voltage: GNExS1 GNExS2
10-30Vdc or 48Vdc 10-30Vdc or 48Vdc
100 - 260Vac/dc 100 - 260Vac
Codes: GNExS1
Ex db IIC T4 Gb for Ta –60°C to +50°C
Ex db IIC T3 Gb for Ta –60°C to +70°C
Ex db IIB T6 Gb for Ta –60°C to +50°C
Ex db IIB T5 Gb for Ta –60°C to +65°C
Ex db IIB T4 Gb for Ta –60°C to +70°C
Codes: GNExS2
Ex db IIC T4 Gb for Ta –60°C to +50°C
Ex db IIC T3 Gb for Ta –60°C to +58°C
Ex db IIB T6 Gb for Ta –60°C to +50°C
Ex db IIB T5 Gb for Ta –60°C to +58°C
Certificate No. SIRA 13ATEX1139X
IECEx SIR 13.0029X
“Warnings”
DO NOT OPEN WHEN ENERGISED
DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE MAY BE
PRESENT
ELECTROSTATIC HAZARD - CLEAN ONLY WITH A DAMP CLOTH
IF TEMPERATURE EXCEEDS 70ºC AT ENTRY OR 80ºC AT
BRANCHING POINT USE SUITABLY RATED CABLE AND CABLE
GLANDS
Year of Construction /
Serial No. i.e. 20 / 1GS23000001
3) Type Approval Standards
The sounders have an EC Type Examination and IECEx
certificates issued by KEMA and have been approved to the
following standards:-
EN60079-0:2018 EN IEC60079-0:2018 General Requirements
EN60079-1:2014 A/C:2018 EN 60079-1:2014 ed. 7
Flameproof Enclosure ‘d’
4) Special Conditions for Safe Use
4.1) Installation
The sounders must be installed in accordance with the latest
issues of the relevant parts of the EN 60079 and IEC60079
standards – Selection, Installation and maintenance of
electrical apparatus for use in potentially explosive
atmospheres (other than mining applications or explosive
processing and manufacture):-
EN60079-14:2008 Electrical Installations in Hazardous
IEC60079-14:2007 (Ed4) Areas (other than mines)
EN60079-10-1:2009 Classification of Areas, Gas
Atmosphere
IEC60079-10:2008 (Ed1)
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.
4.2) Specific Conditions
Flameproof joints shall not be repaired or modified in any way
(See figures 1 & 2 for location of flameproof joints).
The enclosure is non-conducting and under certain extreme
conditions may generate an ignition capable level of
electrostatic charge. The user shall ensure that the
equipment is not installed in a location where it may be
subjected to extreme conditions (such as high-pressure
steam) which might cause a build-up of electrostatic charge
on non-conducting surfaces.
2813
II 2G
Epsilon x:
Equipment Group
and Category:
CE Marking:
Notified Body No.

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D157-00-001 Issue 5 25-06-2020 Sheet 2 of 7 (2)
4.3) Maintenance, Repair and Overhaul
Maintenance, repair and overhaul of the equipment should
only be carried out by suitable 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
WARNING:
Do not open when energised.
Electrostatic charging hazard – clean only with a damp cloth.
Do not open when an explosive atmosphere may be present.
If opening the unit during maintenance operations, a clean
environment must be maintained, and any dust layer
removed prior to opening the unit.
For options on unit repairs or replacement parts, contact E2S
using the contact information in the footer of this installation
manual.
5) Zones, Gas Group, Category and Temperature
Classification
The GNExS2 and GNExS1 sounders have been certified Ex
db IIC T4 , T3 and Ex db IIB T6 , T5 ,T4 dependant on
ambient temperature for full marking see section 2. This
means that the units can be installed in locations with the
following conditions:-
Area Classification:
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
Equipment Category: 2G
Temperature Classification:
T1 450o C
T2 300o C
T3 200o C
T4 135o C
T5 100 o C
T6 85 o C
Ambient Temperature Range:
GNExS1 - For range see Marking Codes Section 2
GNExS2 - For range see Marking Codes Section 2
6) Sounder Location and Mounting
The location of the sounders should be made with due regard
to the area over which the warning signal must be audible.
The sounders should only be fixed to services that can carry
the weight of the unit.
The sounder should be securely bolted to a suitable surface
using the 7mm diameter bolt holes in the stainless steel U
shaped mounting bracket (see figure 1). The angle can then
be adjusted in the direction that the sound is primarily
required to cover. This can be achieved by loosening the two
large bracket screws in the side of the unit, which allow
adjustment in steps of 18°. On completion of the installation
the two large bracket adjustment screws on the side of the
unit must be fully tightened to ensure that the unit cannot
move in service.
7) Safety Warning (Electrostatic Hazard)
The acoustic horn section is made of ABS Plastic, therefore
to avoid a possible ELECTROSTACTIC CHARGE the unit
must only be cleaned with a damp cloth.
8) Access to the Flameproof Enclosure
In order to connect the electrical supply cables to the sounder
it is necessary to remove the flameproof cover to gain access
to the flameproof chamber. To achieve by loosening the M3
Grub Screw within the flameproof cover, and then unscrew
the flameproof cover, taking extreme care not to damage the
flameproof joints in the process.
Figure 1
Plastic Acoustic Horn
Please see Safety Warning
in Section 7 of this manual
Flameproof
Chamber
Flameproof
Cover
S/S Mounting
Bracket
Figure 2

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D157-00-001 Issue 5 25-06-2020 Sheet 3 of 7 (3)
On completion of the cable wiring installation the flameproof
joints should be inspected to ensure that they are clean and
that they have not been damaged during installation. Also
check that the ‘O’ ring seal is in place. When replacing the
flameproof cover ensure that it is tightened fully with tool
provided.
9) Power Supply Selection
It is important that a suitable power supply is used to run the
sounders. The power supply selected must have the
necessary capacity to provide the input current to all of the
sounders connected to the system.
The following table shows the input current taken by the
various sounder units:-
Unit Input Input Max.
Type Voltage Current I/P Volts
GNExS2 12V DC 683mA 30V
GNExS2 24V DC 811mA 30V
GNExS2 48V DC 434mA 58V
GNExS2 230V AC 196mA 260V
GNExS2 115V AC 297mA 260V
GNExS1 12V DC 120mA 30V
GNExS1 24V DC 140mA 30V
GNExS1 48V DC 73mA 58V
GNExS1 230V AC 75mA 260V
GNExS1 115V AC 86mA 260V
The input current will vary according to the voltage input level
and the frequency of the tone selected. The current levels
shown above are for the 440Hz Continuous tone @ nominal
input voltage. The above table also shows the maximum
voltages at which the sounders can be operated.
10) Cable Selection
When selecting the cable size consideration must be given to
the input current that each unit draws (see table 2 of 4), the
number of sounders 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.
SAFETY WARNING: If temperature exceeds 70ºC at entry or
80ºC at branching point use suitably rated cable and cable
glands.
11) Earthing
Both AC and DC sounder units must be connected to a good
quality earth. The units are provided with external earthing
terminals which are both located on the terminal chamber
section of the unit (see figures 2 and 3).
When using the external earth terminal a cable crimp lug
must be used. The cable lug should be located between the
two M4 stainless steel flat washers. The M4 stainless steel
spring washer must be fixed between the outer flat washer
and the M4 stainless steel nut to ensure that the cable lug is
secured against loosening and twisting.
12) Cable Glands
The GNExS2 and GNExS2 sounders have dual cable gland
entries which have an M20 x1.5 entry thread as standard.
Only cable glands approved for Ex ‘d’ applications can be
used, which must be suitable for the type of cable being used
and also meet the requirements of the Ex ‘d’ flameproof
installation standards EN 60079-14:2008 / IEC60079-
14:2007.
SAFETY WARNING: If temperature exceeds 70ºC at entry or
80ºC at branching point use suitably rated cable and cable
glands.
If a high IP (Ingress Protection) rating is required then a
suitable sealing washer must be fitted under the cable gland.
When only one cable entry is used the other one must be
closed with an Ex ‘d’ flameproof blanking plug, which must be
suitably approved for the installation requirements.
13) Cable Connections
The cable connections are made into the terminal blocks on
the electronic PCB assembly located in the flameproof
enclosure. See section 8 of this manual for access to the
flameproof enclosure.
On the AC units an eight way terminal block is provided for
the live (x2) , neutral (x2) & earth mains supply wires and
also common (C) linking the second (S2) and third (S3)
stages, (see figures 5 and 6).
On the DC units a six way terminal block is provided for +ve
(x2) and –ve (x2) supply input and second (S2) and third (S3)
stage modes of operation, (see figures 4 and 7).
A single solid or stranded wire with a cross sectional area of
up to 4mm² can be connected to each terminal way or if an
input and output wire is required two 2.5mm² wires can be
connected to each terminal way. When connecting wires to
the terminals great care should be taken to dress the wire 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 and above.
Wire insulation needs to be stripped 6-7mm. Wires may be
fitted securely with crimped ferrules. Terminal screws need to
be tightened down with a tightening torque of 0.56Nm / 5 Lb-
in.
Figure 3

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D157-00-001 Issue 5 25-06-2020 Sheet 4 of 7 (4)
14) Tone Selection & 1st, 2nd, 3rd & 4th Stage
Alarms
The GNExS2 and GNExS1 sounders have 64 different tones
that can be selected independently for the first and second
stage alarms. The sounders can then be switched to sound
the second, third and fourth stage alarm tones. The tones are
selected by operation of two DIP switches on the PCB for
both DC and AC units. The tone table on page four shows
the switch positions for the 64 tones and which tones are
available for the third and fourth stages.
Stage one (S1) operation : Simply connect the supply voltage
to the normal supply terminals (+ve and –ve for DC units, L
and N for AC units). Dip switch 1 alters the stage one tones.
The operation of the second, third and fourth stages is
different for DC and AC units but the stage one supply
terminals must also be connected.
DC Units Second, Third and Fourth Stage Tone Selection
The GNExS2 and GNExS1 DC sounders have the facility to
use either +ve or –ve switching to change the tone to the
second, third and fourth stages. For –ve switching connect
the two headers on the pcb to the left-hand (marked –ve) and
centre pins. For +ve switching connect the headers to the
right hand (marked +ve) and the centre pins.
Stage two (S2) operation : Power +ve and –ve, depending on
which switching mode link either a -ve or +ve supply line to
the S2 terminal. Dip switch 2 alters stage two tone.
Stage three (S3) operation : Power +ve and –ve, depending
on which switching mode link either a -ve or +ve supply line
to the S3 terminal. Dip switch 1 alters stage three tone.
Stage four (S4) operation : Power +ve and –ve, depending on
which switching mode link either a -ve or +ve supply line to
both the S2 & S3 terminals. Dip switch 1 alters stage four
tone.
GNEx S2 AC Second, Third and Fourth Stage Tone Selection
To select the second, third and fourth stage tones on the
GNExS2 AC sounders.
Stage two (S2) operation : Power L and N, link the common
(C) and S2 terminal. Dip switch 2 alters stage two tone.
Stage three (S3) operation : Power L and N, link the common
(C) and S3 terminals. Dip switch 1 alters stage three tone.
Stage four (S4) operation : Power L and N, link the common
(C) both the S2 and S3 terminals. Dip switch 1 alters stage
four tone.
GNExS1 AC Second, Third and Fourth Stage Tone Selection
To select the second, third and fourth stage tones on the
GNExS1 AC sounders.
Stage two (S2) operation : Power L and N, link the L and S2
terminal. Dip switch 2 alters stage two tone.
Stage three (S3) operation : Power L and N, link the L and S3
terminals. Dip switch 1 alters stage three tone.
GNExS1 AC Sounder
AC Terminals
DIP Switches
Figure 7
Figure 4
GNExS2 DC Sounder
Stage
Headers
DIP Switches
Volume Control
DC Terminals
GNExS2 AC Sounder
Volume Control
AC Terminals
DIP Switches
Figure 5
Stage
Headers
DIP Switches
GNExS1 DC Sounder
Volume Control
DC Terminals
Volume
Control
Figure 6

_______________________________________________________________________________________________________________________________
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH [email protected] Tel: [phone]
www.e2s.com Fax: [phone]
Document No. D157-00-001 Issue 5 25-06-2020 Sheet 5 of 7 (5)
Stage four (S4) operation : Power L and N, link the L both the
S2 and S3 terminals. Dip switch 1 alters stage four tone.
15) Volume Control
All GNExS2 and GNExS1 sounders have a volume control to
adjust the output level. To set the required output level,
adjust the potentiometer on the PCB. For maximum output
level the potentiometer should be set to the fully clockwise
position.
16) End of Line Monitoring (DC Units)
On GNExS2 and GNExS1 DC units, dc reverse line
monitoring can be used if required. All DC sounders 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. If an end of line
resistor is used it must have a minimum resistance value of
3k3 ohms and a minimum wattage of 0.5 watts or a minimum
resistance value of 500 ohms and a min. wattage of 2 watts.
Wiring Diagram E