E2S GNExS1FDC024-S User manual

INSTRUCTION MANUAL (ATEX / IECEx / UKEx)
GNExS1FDC024-S
Alarm Horn Sounder –SIL2
For use in Flammable Gas Atmospheres
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
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Document No. D157-00-651-IS
Issue 1
27-10-2022
Sheet 1 of 14
GNExS1FDC024-S
1) Product Table
Model Number
Nominal
Input Voltage
Voltage Range
Nominal
Input Current
Max.
Current
Sound
Pressure Level
dB(A)
Max*
Nom.†
GNExS1FDC024-S
24Vdc
20-28Vdc
185mA
221mA
115
110
*Max = Tone 4
†Nom. = Tone 44
The table shows the input current taken by the various sounders.
The current levels shown above are for the 440Hz Continuous tone @ nominal input voltage.
Nominal current at nominal voltage.
Max rated current at worst case supply voltage.
Table 1: Electrical Ratings.
Ensure the system power supply is capable of providing the maximum current required for all sounders. Review associated cable size,
length and quantity of sounders on each circuit.

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Sheet 2 of 14
2) Warnings
•DO NOT OPEN WHEN ENERGISED.
•DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE IS
PRESENT.
•POTENTIAL ELECTROSTATIC CHARGING HAZARD.
•ALL ENTRIES M20 X 1.5MM.
•IF TEMPERATURE EXCEEDS 70°C AT ENTRY OR 80°C
AT BRANCHING POINT USE SUITABLE RATED CABLE
AND CABLE GLANDS.
•IF OPENING THE UNIT DURING MAINTENANCE
OPERATIONS A CLEAN ENVIRONMENT MUST BE
MAINTAINED AND ANY DUST LAYER REMOVED PRIOR
TO OPENING THE UNIT.
3) Marking & Rating Information
All units have a rating label, which carries the following
important information.
Products may have further approvals, see E2S website for
further details.
ATEX / IECEx / UKEx Ratings
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’
Model No:
Rating
GNExS1F
DC024-S
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
Certificate No.
SIRA 13ATEX1139X
IECEx SIR 13.0029X
CSAE 21UKEX1558X
Epsilon x
Equipment Group
and Category:
II 2G
CE Marking and
Notified Body No.
2813
UKCA Marking and
Notified Body No.
0518
4) Zones, Gas Group, Category and
Temperature Classification
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 in
normal operation, 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 for Gas Applications
T1
450oC
T2
300oC
T3
200oC
T4
135oC
T5
100ºC
T6
85ºC
Equipment Category
2G
Ambient Temperature Range
GNExS1F
DC024-S
-60°C to +70°C
IP Rating
IP6X to EN/IEC60079-0
IP66 to EN60529
5) Special Conditions for Safe Use
Repair of the Flame Path is not permitted.
Figure 1: Flame Path.
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.

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Document No. D157-00-651-IS
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Sheet 3 of 14
6) Product Mounting and Access
6.1. Location and Mounting
The sounder should be secured to any flat surface using the
three 7mm fixing holes (see figure 2). The angle can then be
adjusted as required but the mounting restrictions must be
observed (see outline drawings for details, D157-05-001 for
GNExS1F). This can be achieved by loosening the two large
bracket screws in the side of the unit, which allow adjustments
in steps of 18°.
Figure 2: Fixing Location for GNEx[S1F] Sounder.
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.
The enclosure provides IP66 protection and is suitable for
installation in exterior locations providing it is positioned so that
water cannot collect in the horn, and the cable entry is sealed.
6.2. Access to the Flameproof Enclosure
Warning –Hot surfaces. External
surfaces and internal components
may be hot after operation, take
care when handling the equipment.
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 (see figure 3).
Figure 3: Accessing the Explosion Proof Enclosure.
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.
Ensure that the ‘O’ ring seal is in place and undamaged.
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 sounder
enclosure. Tighten the M3 grub screw.
7) Installation Requirements
7.1. Installation Standards Compliance
Warning –High voltage may be
present, risk of electric shock.
DO NOT open when energised,
disconnect power before opening.
The sounder must only be installed by suitably qualified
personnel in accordance with the latest issues of the relevant
standards.
ATEX / IECEx / UKEx installation standards:
EN60079-14:2008 / IEC60079-14:2007 (Ed4): Electrical
Installations in Hazardous Areas (other than mines).
EN60079-10-1:2009 / IEC60079-10:2008 (Ed1):
Classification of Areas, Gas Atmosphere
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.
7.2. Cable Selection and Connections
When selecting the cable size, consideration must be given to
the input current that each unit draws (see table 1), 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 the sounders connected to the
line.
Electrical connections are to be made into the terminal blocks
on the PCBA located in the flameproof enclosure using solid
wire 0.5-4mm² / AWG 20-12 or stranded wire, sizes 0.5-
2.5mm² / AWG 24-14. Wire insulation needs to be stripped
8mm. Wires may be fitted securely with crimped ferrules.
Figure 4: Wire Preparation.
Terminal screws need to be tightened down with a tightening
torque of 0.45 Nm / 5 Lb-in. An 8-way terminal block is
provided on the AC Sounder, and a 6-way terminal block is
provided on the DC Sounder.

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Sheet 4 of 14
Figure 5: GNExS1 Entries and Terminal Block Location.
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.
Earthing
Both AC and DC sounder 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 (see figure 5).
Internal earthing connections should be made to the PCB
terminal block or to the Internal Earth Stud of the housing using
a ring crimp terminal to secure the earth conductor between
the two M4 stainless steel flat washers. 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 between the two M5 stainless steel flat
washers, then reassemble the M5 spring washer and tighten
the M5 nut to ensure that the cable lug is secured against
loosening and twisting. The external earth conductor should be
at least 4mm2in size.
7.3. Cable Glands, Blanking Elements & Adapters
For high ambient temperatures the cable entry or the cable
branching point temperatures may exceed:
•70ºC at entry point.
•80ºC at branching point.
Therefore, suitable heat resisting cables and cable glands
must be used, with a rated service temperature at least as
stated in the table below:
Max Ambient Temperature (ºC)
Model
40
45
50
55
60
65
70
GNExS1F
DC024-S
70
75
80
85
90
95
Table 2: Min. Ratings of Cables & Cable Glands.
Cable Glands
Appropriate cable glands to be customer supplied.
The cable entries have an M20 x 1.5 –6H entry thread. Only
suitably rated and ATEX / IECEx & UKEx 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.
Blanking Plugs
When only one cable entry is used the other entries must be
closed with suitably rated and certified blanking plugs as per
type of approval.
Any unused cable entries must be closed with suitably rated
and ATEX / IECEx & UKEx certified blanking plugs.
Ingress Protection
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.
Adapters
The GNEx sounder 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 & UKEx certified adapters.
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.

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Sheet 5 of 14
8) Settings
Following illustrations show the settings available for GNExS1
Alarm Horn Sounders. See schematic diagrams D190-06-651.
8.1. SPL Configuration
See Table 1 for product power supply and Sound Pressure
Levels (SPL). Only set volume control to max to ensure SIL2
compliance.
Configuration for DC Units
Figure 6: DC PCBA SPL Configuration.
8.2. Stage Switching Polarity (DC Units)
Switching from positive switching (default) to negative
switching - DC Only.
NOTE: Max supply is 33V DC –if higher DC voltage is
required, use Negative switching.
Figure 8: Stage Switching Polarity.
8.3. Tone Selection
The GNExS Alarm Horn Sounders have 64 different tones that
can be selected independently for the first and second stage
alarms. The tones are selected by operation of the tone setting
DIP switch 1 & DIP 2witch 2 (see figure 6) on the PCB, for
stage 1 and stage 2 respectively.
However please see section 14 which outlines the SIL 2
approved tone available of this tone table.
Default = S2 –Tone 1
Default = S1 –Tone 44
(ON = 1, OFF = 0)
Figure 9: DIP switch configuration
The sounder can also be switched to sound the third and fourth
stage alarm tones.
The tone table (D221-95-651-IS) shows the switch positions
for the 64 tones on first and second stages and which tones
are available for the third and fourth stages dependent on the
Stage 1 DIP switch setting.
Following table (Table 3) is a summary of wiring options.

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Sheet 6 of 14
Config.
Voltage
Configuration Description
Features
Product
Option
Identifier
See documents D190-06-651 for DC schematic diagrams.
1a
DC
Single Stage Configuration
•Line monitoring
•Positive Switching
1
1b
DC
Two Stage Configuration
•Common Negative
•Positive Switching
1
1c
DC
Three/Four Stage Configuration
•Common Negative
•Positive Switching
1
2
DC
Three/Four Stages. Voltage Free 2nd, 3rd &
4th Stage Activation Configuration
•Common Positive
•Customer Set H1 & H2 to Negative
Switching
1
Table 3: Summary of Wiring Options.
9) End of Line Monitoring (DC Units)
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.
The resistor must be connected directly across the +ve and -
ve terminals as shown in the following drawing. The resistor
leads should be kept as short as possible.
SIL2 line monitoring module product version: see section 19
for standard default values and product coding. See document
D190-06-651 for associated wiring diagram.
Figure 10: End of Line Resistor placement.
Note that the maximum forward polarity monitoring voltage is
6V. A monitoring voltage greater than 6V may activate the
alarm horn sounder and the 2nd, 3rd or 4th stages.
10) 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
Flameproof threaded joints and cemented joints are not
permitted to be repaired.
Units must not be opened while an explosive atmosphere is
present.
If opening the unit during maintenance operations a clean
environment must be maintained and any dust layer removed
prior to opening the unit.
Electrostatic charging hazard - Clean only with a damp cloth.

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Sheet 7 of 14
11) SIL 2 Instruction/Safety Manual
Figure 11 - The SIL 2 Module monitors the Sounder and interfaces to the customer plant.
Warning –To maintain the integrity of the SIL 2 units the system must be installed, commissioned and used within the parameters
outlined in this manual. Failure to comply could result in an unintended unit operation or function.
Warning –The unit must be powered in either Standby or Active modes to comply with the SIL 2 approval requirement.
If the power is disrupted the unit must be allowed to go through the commissioning cycle to reset.
Failure to complete the commissioning cycle and continued disruption in the power supply will generate a fault state
which will require the sounder to be reset (see section 15-4).
Warning –Only the alarm tones specified in section 14 may be selected for use in SIL2 compliant systems.
SIL 2 System Description
The SIL 2 module monitors the function of the device and
provides feedback to the control panel. A fault condition can
be communicated by two methods:
•4 wire installation can be seen as per section 15-1.
A SIL 2 system wiring for fault detection in standby
and active mode with independent fault contacts.
•2 wire installation can be seen as per section 15-2.
A SIL 2 system by the introduction to the monitoring
circuit and linking in an end of line resistor can only
register the fault in standby mode.
12) SIL 2 System Terms and Function
The SIL 2 Sounder Unit Monitors
•Standby mode and Active mode
•Health status of power supply
•Sounder correct function and tone pattern
The SIL 2 sounder operates as part of a SIL 2 system.
The sounder will after commissioning remain powered in
Standby mode (reverse polarity) until the sounder is required
to operate. When the signaling device is required to operate
the polarity is changed to normal supply and the sounder will
go into Active mode where it will start to sound the correct
tone. When periodically testing the system and sounders
operation is put into Active mode.
The system panel or PLC will control whether the system is in
either of the main two operational modes.
Standby Mode –This is where the power supply polarity is
reversed so negative (–ve) is feed to the positive (+) sounder
terminal and positive (+) is feed to the negative (–ve) sounder
terminal.
In Standby mode the sounder will not sound the tone but the
SIL 2 unit is monitoring power supply and is set-up ready to go
to Active (alarm) mode.
Power relay RLY1-1 will be open whilst SIL 2 relay RLY1-2 will
be closed contact between terminals 1 & 2.
If power is disrupted the SIL 2 unit will go into Fault mode, in
fault mode the Power relay RLY1-1 will close whilst SIL 2 relay
RLY1-2 will become open circuit between terminals 1 & 2.
Active Mode –This is where the power is in normal polarity,
positive (+) supplied to the positive (+) sounder terminal and
negative (–ve) is supplied to the negative (–ve) sounder
terminal.
In Active mode the alarm horn sounder will output the selected
alarm tone. The SIL 2 module checks for the correct alarm tone
output and the functionality of the alarm tone signal generation
process.
Power relay RLY1-1 will be open whilst SIL 2 relay RLY1-2 will
be closed contact between terminals 1 & 2.
J3 HEADER PIN

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The SIL 2 unit will also check for signal polarity.
If a fault is found the SIL 2 unit will go into Fault mode.
If power is disrupted the SIL 2 unit will go into Fault mode, in
fault mode the Power relay RLY1-1 will close whilst SIL 2 relay
RLY1-2 will become open be circuit between terminals 1 & 2.
Fault modes - The fault modes listed 12-1 & 12-2 below will
make the SIL 2 unit change the state for relays RLY1-1 and
RLY1-2.
In fault mode the Power relay RLY1-1 will close whilst SIL 2
relay RLY1-2 will become open circuit between terminals 1 &
2.
12-1 Sounder Failure
•Tone Failure –No Tone detected
•Sounder Controller failure –No tone generation pulse
detected
•Tone Rate Failure –Regular tone cycle erratic
12-2 Power Failure / SIL 2 Failure
•SIL 2 Controller failure –Internal function and system
checking flags fault
•Rapid Power cycling –System indicates power
instability
•Total Power Failure
It is possible to reset these faults if they were transitory.
Resetting Failure (by power cycling) - It is possible that the SIL
2 unit can be reset by powering the unit off for a period greater
than 20 seconds. On restarting the unit and running through
the commissioning cycle the fault may clear.
Resetting Failure (by Hard Reset) - It is possible that the SIL 2
unit can be reset by hard resetting the unit using the reset
jumper within the unit (see section 15-4) on hard resetting.
On restarting the unit and running through the commissioning
cycle, the fault may clear. It is necessary to run the test function
cycle again to see if the fault is still evident.
If the hard reset process does not correct the latched fault the
alarm horn sounder may require further investigation, please
contact your local E2S representative.
Commissioning System - Functional start-up of System
(Normally in reverse polarity mode)
When Commissioning system the power must not be disrupted
to the SIL 2 Unit within the unit’s initialization cycle which is 5
seconds.
Once past this period the SIL 2 system is fully operational and
will be in monitoring the sounder and power in Standby mode.
The relay RLY1-2 on the SIL 2 unit will only remain open for a
maximum of 1 second on commissioning start-up. RLY1-2 will
subsequently close contacts 1 & 2 indicating healthy
operation. Contact 1 & 2 will only remain open in the event of
a fault or a loss of power.
System Testing (Active Mode normal polarity)
The SIL 2 system will remain monitoring the power in standby
mode until the polarity is changed to normal mode to enable
an active system for sounder functional testing.
Important: - The polarity must be held in active mode for a
period in excess of 15 seconds to ensure a full system check
is performed.
Once the test period has been completed the unit can be
switched back to standby mode by reversing the polarity.
If no faults have been found during the test the relays will
remain in steady state.
The SIL 2 unit will continue to monitor the power and module
function.
Important: - The automated test cycle must be undertaken on
at least a weekly basis to maintain the SIL 2 units reliability.
System Activation (Active Mode normal polarity)
The SIL 2 system will remain monitoring the power in standby
mode until the polarity is changed to Active mode to enable an
active system for sounder to function as a warning signaling
device.
Important :- The polarity must be held in active mode for a
period in excess of 15 seconds to ensure a full system check
is performed whilst in alarm mode, although it is expected that
during a system activation this period will be significantly
greater.
Note :- The fault indication signal on TB1 can take up to 50
milliseconds to indicate system fault.

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Sheet 9 of 14
13) SIL 2 Wiring configuration and Sounder set-up
Figure 12 –Terminals and header pins for sounder
Power & Communication with the system control panel can be configured in two ways: - Although it is highly recommended that the
unit is wired as stated in this section 15-1 as a 4 –Wire System.
14) SIL 2 APPROVED TONE SELECTION
GNExS1FDC024-S sounders need to be set to one off the SIL 2 approved tones to work correctly with the automated sounder check
on pattern generation and signal output checks.
Important: - Only tones use tones that are stated as SIL 2 approved for the SIL 2 application. Ensure that the unit is set to one of
these tones see in Tone Table (D221-95-651-IS).
As factory default the sounder should be set to Stage 1 Dip SW1 to Tone 44 and Stage 2 Dip SW2 to Tone 1.
J3 Header –Hard Reset
Shown in factory default position A
(see section 15-4), set to
Normal operation
Sounder Supply Terminals
+
-
J1 Header –Current Sense Resistor (CSR)
Shown in factory default position A
(see section 15-3), places SIL TB1 Current
sense resistor in circuit.
J2 Header –Fault Resistor (FR)
Shown in factory default position A
(see section 15.3) removes power
supply terminal block. Fault resistor
& relay RLY 1-1out of circuit.
DIP Switch Tone Selection
SIL Relay Terminals TB1
2
1

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15-1) SIL 2 system wiring for fault detection in standby and active mode –4 wire installation
(Recommended)
The customer is required to wire into both the sounder power supply terminals block and also the SIL 2 Relay terminals TB1
The power supply terminals only need to have the supply power connected. This will be reverse polarity for monitoring mode and
normal polarity for active mode. There is no need to fit an EOL resistor on the power supply terminal block as the TB1 is configured to
raise a fault alarm in any situation.
Terminal block TB1 is the output from the SIL 2 monitoring relay. Relay RLY 1-2 provides a closed circuit between TB1 terminals 1 &
2 whilst powered. On detection of a fault event this will become open circuit.
The fault will be seen via the SIL 2 TB1 terminals as soon as the fault occurs in either Active or Standby modes.
When no fault is detected the circuit to the SIL 2 TB1 terminals 1 & 2 will include a factory fitted 3.3K Ohm current sense resistor
(CSR) in series. When the circuit is driven with 24Vdc the detection current seen is ~7.3mA @ 24V.
The only other fault mode is if the cable goes short circuit where a short will be seen by the panel.
Option: Should the fault event output of RLY1-2 be required to operate as a switch, header J1 can be set to link pins 1 & 2 (see
figure 13) thereby removing the 3.3k Ohm current sense resistor (CSR) from the circuit.
Note: a cable short circuit will not be detectable in this configuration.
For one unit only:
Sounder power
supply terminal
block
Current drawn
(mA)
Active Mode
190mA
Standby Mode
25mA
SIL2
TB1 Current
Sense Resistor
value
Current drawn
(mA)
3.3kΩ
7.2mA
On fault mode, current drops to 0 as
circuit goes open.
Figure 13 - Schematic of SIL 2 system wiring for fault detection in standby and active mode –4 wire installation.
If multiple SIL 2 alarm horn sounders are to be cabled in series the monitoring connections differ from that of a single alarm horn
sounder. For more information see manual D197-00-651-IS available from the E2S website.
15-2) SIL 2 system wiring for fault detection in standby mode only –2 wire installation
Cabling is required to the positive '+' and negative '-' power input terminals only. Monitoring will occur in standby mode only whilst
power supply polarity is reversed. An EOL resistor may be added during installation or can be factory fitted. See Table 4 for EOL
resistor value guidance.
The SIL2 monitoring module contains a factory fitted Power Supply Fault Resistor 2.2K Ohm (FR). When a fault is detected the Fault
Resistor will activated. The total measurable resistance of the EOL resistor and Fault Resistor across the power terminals which
already has customer EOL resistor (2.2kΩ) in place. This will result in a total fault detection current of 41.8mA @ 24V but can only be
detected when unit is in Standby Mode.
Important: - The 2 wire configuration will not warn of a fault whilst in Active mode. A fault will only be detectable in standby mode
when power supply polarity is reversed.
Important: - The 2-wire configuration requires the J2 header pin to be set to position B (see figure 16). Factory default position is A.

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Document No. D157-00-651-IS
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Sheet 11 of 14
Figure 14 - Schematic of SIL 2 system wiring for fault detection in standby mode only –2 wire installation
To evaluate the total current drawn from the SIL 2 unit, use the equation below.
In standby mode, where there is no fault, RLY 1-1 is open. This means the voltage only passes through the customer EOL resistor
and the current drawn from the SIL 2 board is 25mA. Therefore, the equation for a No Fault scenario is then:
In standby mode, where there is a fault, the circuit is closed. This means the voltage passes through both the customer EOL resistor
and current sense resistor and the current drawn from the SIL 2 board is 20mA. The customer must first calculate the resistance of
the two resistors in parallel before applying the currents to the equation. The equation for a Fault scenario is then:
Table 4: Resistor combinations and the currents drawn when no faults and faults occur
If multiple SIL 2 alarm horn sounders are to be cabled in series the monitoring connections differ from that of a single alarm horn
sounder. For more information see manual D197-00-651-IS available from the E2S website.
I
(Total Current
drawn)
=

(Current drawn from
Fault Resistor)
+

(Current drawn from
Customer EOL resistor)
+

(Current drawn
from SIL board)

(Standby Mode, Total Current drawn - No Fault)
=

(0mA)
+

(See table 4)
+

(25mA)

(Standby Mode, Total Current drawn - Fault)
=

(Total Resistance when EOL & FR in parallel)
+

(20mA)
Standby
Mode
Power Supply Fault Resistor
Customer EOL Resistor
(Fault Mode Only)
Current
drawn
from SIL
Board
Total
current
drawn
Resistor
Value
Current
drawn ()
Resistor
Value
Current
drawn ()
Total
resistance
Current
drawn ()
No Fault
2.2 kΩ
0 mA
2.2 kΩ
10.9 mA
-
-
25 mA
35.9 mA
Fault
-
-
1.1 kΩ
21.8 mA
20 mA
41.8 mA
No Fault
1.0 kΩ
0 mA
1.0 kΩ
24.0 mA
-
-
25 mA
49.0 mA
Fault
-
-
500 Ω
48.0 mA
20 mA
68.0 mA
No Fault
2.2 kΩ
0 mA
3.3 kΩ
7.3 mA
-
-
25 mA
32.3 mA
Fault
-
-
1.3 kΩ
18.2 mA
20 mA
38.2 mA
No Fault
1.8 kΩ
0 mA
3.9 kΩ
6.2 mA
25 mA
31.2 mA
Fault
-
-
1.2 kΩ
19.5 mA
20 mA
39.5 mA
No Fault
1.8 kΩ
0 mA
4.7 kΩ
5.1 mA
-
-
25 mA
30.1 mA
Fault
-
-
1.3 kΩ
18.4 mA
20 mA
38.4 mA
No Fault
2.2 kΩ
0 mA
4.7 kΩ
5.1 mA
-
-
25 mA
30.1 mA
Fault
-
-
1.5 kΩ
16.0 mA
20 mA
36.0 mA

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: [phone]
Document No. D157-00-651-IS
Issue 1
27-10-2022
Sheet 12 of 14
15-3 Header Pins Settings
J1 Header Pin - Position A
Factory default position (pins 1 & 2 not linked)
Places TB1 Current Sense Resistor (CSR) in circuit.
As used in 4 - Wire Configuration
J1 Header Pin - Position B
(pins 1 & 2 linked)
Removes TB1 Current Sense Resistor (CSR) out of circuit.
Figure 15: J1 Header pin positions –Current Sense Resistor (CSR)
J2 Header Pin - Position A
Factory default position (pins 1 & 2 linked)
Removes power supply terminal Fault Resistor (FR) & RLY
1-2 out of circuit.
As used in 4 -Wire Configuration
J2 Header Pin - Position B
(pins 2 & 3 linked)
Places power supply terminal Fault resistor & RLY 1-2 in
circuit.
As used in 2 –Wire Configuration
Figure 16: J2 Header pin positions –Fault Resistor (FR)
15-4 SIL 2 Hard Reset Function
Power down the unit completely for a minimum of 30 seconds. Move the hard reset header pin (Jumper J3) to reset position B
shown. Then power the unit for a minimum of 5 seconds. Power down the unit for 30 seconds and then move the header pin back to
Position A.
The unit has now been reset.
If the hard reset process does not correct the latched fault the alarm horn sounder may require further investigation, please contact
your local E2S representative.
J3 Header Pin - Position A
Factory default position (pins 2 & 3 linked)
Hard Reset Function disabled –Normal Operation
J3 Header Pin - Position B
(pins 1 & 2 linked)
Hard Reset Enabled - Active reset mode
Figure 17: J3 Header pin positions –Hard Reset Function

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: [phone]
Document No. D157-00-651-IS
Issue 1
27-10-2022
Sheet 13 of 14
16) SIL 2 Specific Unit Mounting Requirements
The sounder should be mounted no closer that 5m from a sounder source of similar SPL output. This is to ensure false tone activation
does not occur when the unit is monitoring the tone pulse duration and tone failure.
17) SIL 2 Reliability Data
Reliability and Functional safety IEC/EN61508 which has been assessed and is considered suitable for use in low demand safety
function:
1. Random Hardware Failures and Architectural constraints (route 1H)
2. As an unvoted item (i.e. hardware fault tolerance of 0) at SIL 2
The product was assessed against failure modes:
•Failure respond to an input with a correct tone.
•Failure to respond to an input even with an alternative tone.
•Spurious sound output despite no input.
GNExS1FDC024-S (Failure to Sound)
Integrity in respect of failure to
release
SIL 2
Total Failure rate
0.447 pmh
“hazardous” failure rate (revealed)
0.443 pmh
“hazardous” failure rate (unrevealed)
0.004 pmh
“safe” failure rate (revealed)
0.002 pmh
“safe” failure rate (unrevealed)
0
Diagnostic Coverage
99%
System type
B
Hardware Fault Tolerance
0
Safe Failure Fraction
>99%
PFD (hazardous failure)
3.3 x 10-5
Proof Test Interval
Up to 1 year
GNExS1FDC024-S (Failure to Sound or Incorrect tone)
Integrity in respect of failure to
release
SIL 2
Total Failure rate
0.464 pmh
“hazardous” failure rate (revealed)
0.455 pmh
“hazardous” failure rate (unrevealed)
0.009pmh
“safe” failure rate (revealed)
0.002 pmh
“safe” failure rate (unrevealed)
0
Diagnostic Coverage
98%
System type
B
Hardware Fault Tolerance
0
Safe Failure Fraction
>97%
PFD (hazardous failure)
5.2 x 10-5
Proof Test Interval
Up to 1 year
Table 5: SIL 2 Failure Rate
18) Synchronised Operation
All GNExS1FDC024-S alarm horn sounders connected to the same power supply and set to the same alarm tone will provide a
synchronised output when activated.

European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: [phone]
Document No. D157-00-651-IS
Issue 1
27-10-2022
Sheet 14 of 14
19) Product Coding for Fault Resistor and Customer EOL Resistor
The customer is able to identify the resistor values chosen on purchase from the product code.
This is represented by the last three characters:
GNExS1FDC024AB1S1R-AFZ
•The first A character denotes the value of the Fault Resistor (FR) Default value is 2.2 kΩ (Code = A) unless an alternative
value is requested when ordering.
•The second F character denotes the value of the Current Sense Resistor (CSR) Default value is 3.3 kΩ (Code = F) unless
an alternative value is requested when ordering.
•The third Z character denotes the value of the unit End Of Line Resistor (EOL) By default no EOL is fitted (Code = Z) A
factory fitted EOL resistor can be specified when ordering.
The values of resistors available are shown in table 6 below.
Code
Resistor Value
Default resistor coding as follows.
GNExS1FDC024AB1S1R-AFZ
Example of a custom requirement resistor coding:
GNExS1FDC024AB1S1R-GEF
Where the (FR) Fault Resistor is (G = 3.9 kΩ)
(CSR) Current Sense Resistor is (E = 2.7 kΩ)
(EOL) End Of Line resistor is (F = 3.3 kΩ)
A
2.2 kΩ
B
1.0 kΩ
C
1.5 kΩ
D
1.8 kΩ
E
2.7 kΩ
F
3.3 kΩ
G
3.9 kΩ
H
4.7 kΩ
J
5.6 kΩ
K
6.8 kΩ
L
8.2 kΩ
M
11 kΩ
Z
None Fitted
Table 6: Resistor Value code
Note: To utilise the full monitoring functionality the 4-wire configuration is recommended. An EOL resistor is not required for this
configuration.
The alternative 2-wire configuration requires an EOL resistor to be fitted. The EOL resistor can be specified during ordering and
factory fitted or selected and fitted during the alarm horn sounder installation.
See section 9 for EOL resistor location and wattage requirements. E2S recommends a value of 2.2K Ohm. If an alternative value is
required, please see section 15-2.
Both the (FR) Fault Resistor and (CSR) Current Sense Resistor are factory fitted and cannot be user replaced.

E2S Warning Signals Impress House, Mansell Road, Acton, London W3 7QH [email protected] e2s.com Page 1 of 1 D221-95-651-IS_Issue_B - 28/11/2022
1000Hz PFEER Toxic Gas
1200/500Hz @ 1Hz DIN /PFEER P.T.A.P.
1000Hz @ 0.5Hz(1s on, 1soff) PFEER Gen. Alarm
1.4KHz-1.6KHz 1s, 1.6KHz-1.4KHz 0.5s NF C 48-265
544Hz(100mS)/440Hz (400mS) NF S 32-001
1500/500Hz - (0.5s on , 0.5s off) x3 + 1s gap AS4428
500-1500Hz Sweeping 2 sec on 1 sec off AS4428
500/1200Hz @ 0.26Hz (3.3son, 0.5s off) Netherlands -
NEN 2575
1000Hz (1s on, 1s off)x7 + (7s on, 1s off) IMO Code 1a
1000Hz (1s on, 1s off)x7 + (7s on, 1s off) IMO Code 1a
420Hz(0.5s on, 0.5s off)x3 + 1s gap ISO 8201 Temporal
Pattern
1000Hz(0.5s on, 0.5s off)x3 + 1s gap ISO 8201 Temporal
Pattern
422/775Hz - (0.85 on, 0.5 off) x3 + 1s gap NFPA -
Temporal Coded
1000/2000Hz @ 1Hz Alternating Singapore
300Hz Continuous
440Hz Continuous
470Hz Continuous
500Hz Continuous IMO code 2 (Low)
554Hz Continuous
660Hz Continuous
800Hz IMO code 2 (High)
1200Hz Continuous
2000Hz Continuous
2400Hz Continuous
440Hz @0.83Hz (50
cycles/minute) Intermittent
470Hz @0.9Hz - 1.1s Intermittent
470Hz @5Hz - (5
cycles/second) Intermittent
544Hz @ 1.14Hz - 0.875s Intermittent
655Hz @ 0.875Hz Intermittent
660Hz @0.28Hz - 1.8sec
on, 1.8sec off Intermittent
660Hz @3.34Hz - 150mS
on, 150mS off Intermittent
745Hz @ 1Hz Intermittent
800Hz - 0.25sec on, 1 sec off Intermittent
800Hz @ 2Hz IMO code 3.a
(High) Intermittent
1000Hz @ 1Hz Intermittent
2400Hz @ 1Hz Intermittent
2900Hz @ 5Hz Intermittent
363/518Hz @ 1Hz Alternating
450/500Hz @ 2Hz Alternating
554/440Hz @ 1Hz Alternating
554/440Hz @ 0.625Hz Alternating
561/760Hz @0.83Hz (50
cycles/minute) Alternating
800/1000Hz @ 0.875Hz Alternating
2400/2900Hz @ 2Hz Alternating
500/1200Hz @ 0.3Hz Sweeping
560/1055Hz @ 0.18Hz Sweeping
560/1055Hz @ 3.3Hz Sweeping
660/1200Hz @ 1Hz Sweeping
800/1000Hz @ 1Hz Sweeping
800/1000Hz @ 7Hz Sweeping
800/1000Hz @ 50Hz Sweeping
2400/2900Hz @ 7Hz Sweeping
2400/2900Hz @ 1Hz Sweeping
2400/2900Hz @ 50Hz Sweeping
2500/3000Hz @ 2Hz Sweeping
2500/3000Hz @ 7.7Hz Sweeping
800Hz Motor Siren
1200Hz Motor Siren
2400Hz Motor Siren
SIL 2
Approved
Tone.
Tone Description Tone Visual
Stage 1
DIP SW 1/2
Settings
1 2 3 4 5 6
Stage 3
Set DIP
SW 1
(S3)
Stage 4
Set DIP
SW 1
(S2 + S3)
0 0 0 0 0 0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
46
47
48
49
50
52
53
54
55
56
57
58
59
60
61
62
63
42
1 0 0 0 0 0
0 1 0 0 0 0
1 1 0 0 0 0
0 0 1 0 0 0
1 0 1 0 0 0
0 1 1 0 0 0
1 1 1 0 0 0
0 0 0 1 0 0
1 0 0 1 0 0
0 1 0 1 0 0
1 1 0 1 0 0
0 0 1 1 0 0
1 0 1 1 0 0
0 1 1 1 0 0
1 1 1 1 0 0
0 0 0 0 1 0
1 0 0 0 1 0
0 1 0 0 1 0
1 1 0 0 1 0
0 0 1 0 1 0
1 0 1 0 1 0
0 1 1 0 1 0
1 1 1 0 1 0
1 1 0 1 1 0
0 0 1 1 1 0
0 1 1 1 1 0
0 0 0 0 0 1
0 1 0 0 0 1
1 1 0 0 0 1
0 0 1 0 0 1
1 0 1 0 0 1
0 1 1 0 0 1
1 1 1 0 0 1
0 0 0 1 0 1
0 1 0 1 0 1
1 0 1 1 0 1
0 1 1 1 0 1
1 1 1 1 0 1
0 0 0 0 1 1
1 0 0 0 1 1
0 1 0 0 1 1
1 1 0 0 1 1
0 0 1 0 1 1
1 0 1 0 1 1
0 1 1 0 1 1
1 1 1 0 1 1
0 0 0 1 1 1
1 0 0 1 1 1
0 1 0 1 1 1
1 1 0 1 1 1
0 0 1 1 1 1
1 0 1 1 1 1
0 1 1 1 1 1
0 0 0 1 1 0
1 0 0 1 1 0
0 1 0 1 1 0
1 1 1 1 1 0
1 0 0 0 0 1
1 0 0 1 0 1
1 0 1 1 1 0
1000Hz
1200Hz
500Hz 1s
1000Hz 1s
1s
1600Hz
1400Hz 1s
0.5s
544Hz 0.1s
0.4s
440Hz
0.5s
1500Hz
500Hz 0.5s 0.5s 0.5s 0.5s 1s
2s 1s
3s 0.5s
1500Hz
500Hz
1200Hz
500Hz
1000Hz
1s
1s
1s
1s
1s
1s
1s
1s
1s
1s
1s
1s
1s
1s
7s
7s
420Hz 0.5s
0.5s
0.5s
0.5s
0.5s
1s
1000Hz 0.5s
0.5s
0.5s
0.5s
0.5s
1s
1200Hz
500Hz 0.85 0.5s 0.85 0.5s 0.85
f(Hz)
a(s)
b(s)
(f=440, a=0.6, b=0.6)
(f=470, a=0.55, b=0.55)
(f=470, a=0.1, b=0.1)
(f=470, a=0.43, b=0.44)
(f=655, a=0.57, b=0.57)
(f=660, a=1.8, b=1.8)
(f=660, a=0.15, b=0.15)
(f=745, a=0.5, b=0.5)
(f=800, a=0.25, b=1)
(f=800, a=0.25, b=0.25)
(f=1000, a=0.5, b=0.5)
(f=2400, a=0.5, b=0.5)
(f=2900, a=0.1, b=0.1)
f1(Hz)
a(s)
f(Hz)
f1(Hz)
a(s) a(s)
f(Hz)
(f=363, f1=518, a=0.1)
(f=450, f1=500, a=0.25)
(f=440, f1=554, a=0.5)
(f=440, f1=554, a=0.8)
(f=561, f1=760, a=0.6)
0 0 1 1 0 1
1 1 0 1 0 1
43
44
45
780/600Hz @ 0.96Hz Alternating
800/1000Hz @ 2Hz Alternating
970/800Hz @ 2Hz Alternating
64 Simulated Bell 1 1 1 1 1 1
f1(Hz)
a(s) a(s)
f(Hz)
(f=800, f1=1000, a=0.57)
(f=2400, f1=2900, a=0.25)
f1(Hz)
a(s) a(s)
f(Hz)
(f=800, f1=1000, a=0.25)
f1(Hz) a(s) a(s)
f(Hz)
(f=600, f1=780, a=0.52)
f1(Hz) a(s) a(s)
f(Hz)
(f=800, f1=970, a=0.25)
(f=500, f1=1200, a=3.34)
(f=560, f1=1055, a=5.47)
(f=560, f1=1055, a=0.3)
f1(Hz)
a(s)
f(Hz)
51 600/1250Hz @ 0.125Hz Sweeping (f=600, f1=1250, a=8)
f(Hz)
a(s)
(f=800, a=1.6)
(f=1200, a=2)
(f=2400, a=1.7)
1450Hz 0.25s
0.69ms
(f=660, f1=1200, a=1)
(f=800, f1=1000, a=1)
(f=800, f1=1000, a=0.14)
(f=800, f1=1000, a=0.02)
(f=2400, f1=2900, a=0.14)
(f=2400, f1=2900, a=1)
(f=2400, f1=2900, a=0.02)
(f=2500, f1=3000, a=0.5)
(f=2500, f1=3000, a=0.13)
(f=300)
(f=440)
(f=470)
(f=500)
(f=554)
(f=660)
(f=800)
(f=1200)
(f=2000)
(f=2400)
f(Hz)
0.5s
2
3
2
24
19
44
44
24
34
34
1
1
1
3
44
44
44
24
24
24
24
24
24
24
24
24
24
8
8
24
8
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
8
8
24
8
21
24
24
24
24
24
24
24
24
24
3
20
44
44
44
1
1
1
1
35
1
1
8
8
8
35
8
8
8
8
8
8
8
8
8
19
19
19
19
19
19
19
19
19
19
19
19
19
19
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
12
1
1
8
8
8
35
35
35
35
35
f1(Hz)
a(s)
f(Hz)
Product Option 'S' SIL 2 Approved Tone Table
Stage 1
Set DIP
SW 1
Tone No.
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
No
No
Yes
No
Yes
No
No
No
No
2000Hz
1000Hz
0.5s 0.5s

warning signals
2S
D1x
EUROPEAN SAFETY SYSTEMS LTD
IMPRESS HOUSE
MANSELL ROAD
ACTON
LONDON W3 7QH
WWW.E2S.COM
C
THIS DRAWING AND ANY INFORMATION OR DESCRIPTIVE
MATTER THEREIN IS COMMUNICATED IN CONFIDENCE AND
IS THE COPYRIGHT PROPERTY OF EUROPEAN SAFETY
SYSTEMS LTD. NEITHER THE WHOLE OR ANY EXTRACT MAY
BE DISCLOSED, LOANED, COPIED OR USED FOR
MANUFACTURING OR TENDERING PURPOSES WITHOUT THEIR
WRITTEN CONSENT.
EUROPEAN SAFETY SYSTEMS LTD.
AS PER LATEST DATE OF ISSUE SHOWN ABOVE
DRAWING TO BS8888:2000
GEOMETRIC TOLERANCES TO ISO1101:1983
LINEAR DIMENSIONAL TOLS
ANGULAR DIMENSIONAL TOLS
STANDARDS
MOD No. REASON - INITIAL - DATEISSUE
DATE
APPROVED
CHECKED DATE
DATE
DRAWN WEIGHT (Kg)
SURFACE FINISH
MATERIAL
ALTERNATIVE MATERIAL SHEETSCALE
TITLE
A3
IF IN DOUBT, ASK -
DO NOT SCALE
ALL DIMENSIONS IN MM
DRAWING NUMBER
A
B
C
D
E
F
G
109
G
F
E
78 6
5
D
C
134
2
A
B
D190-06-651
R.S.RAIT
B.ISARD
R.N.POTTS OF
NTS 12
OPTIONAL LINE MONITORING RESISTOR, CUSTOMER SUPPLIED,
RECOMMENDED VALUE FOR SIL 2 EOL = 2.2KΩ2.0W
MINIMUM EOL RESISTOR VALUES FOR 28VDC MAX VOLTAGE
500ΩMIN AT 2W MIN OR 2.4KΩMIN AT 0.5W MIN
EOL
Stage 1 +ve IN
Stage 1 +ve OUT
Common -ve IN
Common -ve OUT
Stage 2 +ve
Stage 1 +ve IN
Stage 1 +ve OUT
Common -ve IN
Common -ve OUT
Stage 2 +ve
Stage 3 +ve
EOL
+
-
-
+
EOL
+
-
-
+
S2
EOL
+
-
-
+
S2
S3
Stage 1 +ve IN
Stage 1 +ve OUT
Stage 1 -ve IN
Stage 1 -ve OUT
Single Stage Configuration Config.: 1a
Line Monitoring
Set to positive switching (default)
Stage 1: Apply Power to Stage 1 +ve & Stage 1 -ve
For full 4-Wire SIL 2 Connection Monitor SIL 2 +ve and SIL 2 -ve
Terminals 1 & 2 in RLY1-2
Two Stage Configuration Config.: 1b
Common Negative
Set to positive switching (default)
Stage 1: Apply Power to Stage 1 +ve & Common -ve
Stage 2: Apply Power to Stage 2 +ve & Common -ve
For full 4-Wire SIL 2 Connection Monitor SIL 2 +ve and SIL 2 -ve
Terminals 1 & 2 in RLY1-2
Three/Four Stage Configuration Config.: 1c
Common Negative
Set to positive switching (default)
Stage 1: Apply Power to Stage 1 +ve & Common -ve
Stage 2: Apply Power to Stage 2 +ve &Common -ve
Stage 3: Apply Power to Stage 3 +ve &Common -ve
Stage 4: Apply Power to Stage 2 +ve, Stage 3 +ve & Common -ve
For full 4-Wire SIL 2 Connection Monitor SIL 2 +ve and SIL 2 -ve
Terminals 1 & 2 in RLY1-2
19/09/2022
19/09/2022
19/09/2022
D1xS1 / D1xS2 / GNExS1 / GNExS2 / STExS1 /
STExS2 SIL 2 DC SOUNDER WIRING DIAGRAMS
INTRODUCTIONINTRODUCTION
1RSR - 19/09/2022
SIL 2 +ve IN
SIL 2 -ve OUT
+
-
+
-
+
-
4 - WIRE SIL RLY1-2 4 - WIRE SIL RLY1-2
SIL 2 +ve IN
SIL 2 -ve OUT
4 - WIRE SIL RLY1-2
SIL 2 +ve IN
SIL 2 -ve OUT

warning signals
2S
EUROPEAN SAFETY SYSTEMS LTD
IMPRESS HOUSE
MANSELL ROAD
ACTON
LONDON W3 7QH
WWW.E2S.COM
C
THIS DRAWING AND ANY INFORMATION OR DESCRIPTIVE
MATTER THEREIN IS COMMUNICATED IN CONFIDENCE AND
IS THE COPYRIGHT PROPERTY OF EUROPEAN SAFETY
SYSTEMS LTD. NEITHER THE WHOLE OR ANY EXTRACT MAY
BE DISCLOSED, LOANED, COPIED OR USED FOR
MANUFACTURING OR TENDERING PURPOSES WITHOUT THEIR
WRITTEN CONSENT.
EUROPEAN SAFETY SYSTEMS LTD.
AS PER LATEST DATE OF ISSUE SHOWN ABOVE
DRAWING TO BS8888:2000
GEOMETRIC TOLERANCES TO ISO1101:1983
LINEAR DIMENSIONAL TOLS
ANGULAR DIMENSIONAL TOLS
STANDARDS
MOD No. REASON - INITIAL - DATEISSUE
DATE
APPROVED
CHECKED DATE
DATE
DRAWN WEIGHT (Kg)
SURFACE FINISH
MATERIAL
ALTERNATIVE MATERIAL SHEETSCALE
TITLE
A3
IF IN DOUBT, ASK -
DO NOT SCALE
ALL DIMENSIONS IN MM
DRAWING NUMBER
A
B
C
D
E
F
G
109
G
F
E
78 6
5
D
C
134
2
A
B
D190-06-651
R.S.RAIT
B.ISARD
R.N.POTTS
NTS
SWITCHES FOR STAGE OPERATION
CUSTOMER SUPPLIED
Stage 2 -ve
Common +ve IN
Common +ve OUT
Stage 1 -ve OUT
Stage 3 -ve
Stage 1 -ve IN
H2
H1
OF
22
EOL
+
-
-
+
S2
S3
OPTIONAL LINE MONITORING RESISTOR, CUSTOMER SUPPLIED,
EOL
Set H1 & H2 to -ve switching
Three/Four Stages. Voltage Free 2nd, 3rd & 4th Stage Activation Configuration Config.: 2
Common Positive
Customer Set H1 & H2 to Negative Switching (See Below)
Stage 1: Apply Power to Common +ve & Stage 1 -ve
Stage 2: Apply Power to Common +ve & Stage 1 -ve & connect Stage 2 -ve to Stage 1 -ve
Stage 3: Apply Power to Common +ve & Stage 1 -ve & connect Stage 3 -ve to Stage 1 -ve
Stage 4: Apply Power to Common +ve & Stage 1 -ve
& connect Stage 2 -ve & Stage 3 -ve to Stage 1 -ve
For full 4-Wire SIL 2 Connection Monitor SIL 2 +ve and SIL 2 -ve Terminals 1 & 2 in RLY1-2
INTRODUCTIONINTRODUCTION
1RSR - 19/09/2022
19/09/2022
19/09/2022
19/09/2022
D1x
+
-
4 - WIRE SIL RLY1-2
SIL 2 +ve IN
SIL 2 -ve OUT
D1xS1 / D1xS2 / GNExS1 / GNExS2 / STExS1 /
STExS2 SIL 2 DC SOUNDER WIRING DIAGRAMS
RECOMMENDED VALUE FOR SIL 2 EOL = 2.2KΩ2.0W
MINIMUM EOL RESISTOR VALUES FOR 28VDC MAX VOLTAGE
500ΩMIN AT 2W MIN OR 2.4KΩMIN AT 0.5W MIN

E2S Telephone: [phone] Fax: [phone] Email: [email protected]m www.e2s.com DC-038_Issue_F (GNExS, GNExL) - Page 1 of 2 -
QAF_252_Issue_5
EU Declaration of Conformity
Manufacturer: European Safety Systems Ltd.
Impress House, Mansell Road, Acton
London, W3 7QH
United Kingdom
Authorised Representative: E2S Warnsignaltechnik UG
Charlottenstrasse 45-51
72764 Reutlingen
Germany
Equipment Type: GNExS1, GNExS2
GNExL1, GNEXL2
Directive 2014/34/EU: Equipment and Protective Systems for use in Potentially Explosive Atmospheres (ATEX)
Notified Body for EU type Examination (Module B):
Sira Certification Service
Notified Body No.: 2813
CSA Group Netherlands B.V, Utrechtseweg 310, 6812 AR, Arnhem, Netherlands
EU-type Examination Certificate (Module B):
Sira 13ATEX1139X
Notified Body for Quality Assurance Notification / Conformity to EU-type
based on
quality assurance of the production process (Module D):
Sira Certification Service
Notified Body No.: 2813
CSA Group Netherlands B.V, Utrechtseweg 310, 6812 AR, Arnhem, Netherlands
Quality Assurance Notification (Module D):
SIRA 05 ATEX M342
Provisions fulfilled by the equipment:
II 2G Ex db IIB or IIC T3, T4, T5 or T6 Gb
Standards applied:
EN 60079-0:2018
EN 60079-1:2014 A/C:2018
Directive 2014/30/EU: Electromagnetic Compatibility Directive (EMC)
Standards applied:
EN 61000-6-1:2007
EN 61000-6-2:2005
EN 61000-6-3:2007 / A1:2011 / AC: 2012
EN 61000-6-4:2007 / A1: 2011
Directive 2011/65/EU: Restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS)
The product and all the components contained within it are in accordance with the restriction of the use of hazardous substances in electrical and electronic
equipment, including amendment by Directive 2015/863/EU.
Regulation (EC) 1907/2006: Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)
The product and all the components contained within it are free from substances of very high concern.
Other Standards and Regulations
EN 60529:1992+A2:2013 - Degrees of protection provided by enclosures (IP code) –enclosure rated IP66/67

E2S Telephone: [phone] Fax: [phone] Email: [email protected]m www.e2s.com DC-038_Issue_F (GNExS, GNExL) - Page 2 of 2 -
QAF_252_Issue_5
Martin Streetz
Document No.:
DC-038_Issue_F
Quality Assurance Manager
Date and Place of Issue:
London, 23/12/2020
EU Declaration of Conformity
On behalf of European Safety Systems Ltd., I declare that, on the date the equipment accompanied by this declaration is placed on the market, the equipment
conforms with all technical and regulatory requirements of the above listed directives, regulations and standards.
This Declaration is issued under the sole responsibility of the manufacturer.

E2S Telephone: [phone] Fax: [phone] Email: [email protected]m www.e2s.com DC-095_Issue_A (GNExS, GNExL) - Page 1 of 1
QAF_252_Issue_5
Martin Streetz Document No.: DC-095_Issue_A
Quality Assurance Manager Date and Place of Issue: London, 04/02/2022
UKCA Declaration of Conformity
Manufacturer: European Safety Systems Ltd.
Impress House, Mansell Road, Acton
London, W3 7QH
United Kingdom
Equipment Type: GNExS1, GNExS2
GNExL1, GNEXL2
Directive UKSI 2016:1107 (as amended by UKSI 2019:696) – Schedule 3A, Part 1 : Product or Protective System Intended for use in Potentially Explosive Atmospheres
(UKCA)
Notified Body for
UK
type Examination
(Module B)
:
Sira Certification Service
Notified Body No.: 0518
Rake Lane, Eccleston, Chester CH4 9JN, UK
UK
-
type Examination Certificate
(Module B)
:
CSAE 21
UKEX1558X
Notified Body for Quality Assurance
Notification
/
Conformity to EU
-
type
based on
quality assurance of the production process (Module D):
Sira Certification Service
Notified Body No.: 0518
Rake Lane, Eccleston, Chester CH4 9JN, UK
Quality Assurance Notification
(Module D)
:
CSAE 22UKQAN0046
Provisions fulfilled by the equipment:
II 2G
Ex d
b
IIB or IIC T3, T4, T5 or T6
Gb
Standards applied:
EN 60079
-
0:201
8
EN 60079-1:2014 A/C:2018
Directive 2014/30/EU: Electromagnetic Compatibility Directive (EMC)
Standards applied:
EN
61000
-
6
-
1:2007
EN 61000-6-2:2005
EN 61000-6-3:2007 / A1:2011 / AC: 2012
EN 61000-6-4:2007 / A1: 2011
Directive 2011/65/EU: Restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS)
The product and all the components contained within it are in accordance with the restriction of the use of hazardous substances in electrical and electronic
equipment, including amendment by Directive 2015/863/EU.
Regulation (EC) 1907/2006: Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH)
The product and all the components contained within it are free from substances of very high concern.
Other Standards and Regulations
EN 60529:1992+A2:2013 - Degrees of protection provided by enclosures (IP code) – enclosure rated IP66/67
On behalf of European Safety Systems Ltd., I declare that, on the date the equipment accompanied by this declaration is placed on the market, the equipment
conforms with all technical and regulatory requirements of the above listed directives, regulations and standards.
This Declaration is issued under the sole responsibility of the manufacturer.