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INSTRUCTION MANUAL
GNExS1
Alarm Horn Sounder with relay / telephone initiate
For use in Flammable Gas Atmospheres
8.4 Unit Latch mode duration DIP switch S1 setting
The relay/telephone latch duration setting is only applicable
when Header H2 is set to latched mode via header pin set to
position option B.
The alarm horn sounder is activated on the first telephone
ring (or relay pulsed input) and any other subsequent inputs
and will remain activated for the duration as set by DIP switch
S1.
This feature is useful where some countries have short
ringing cadence with long off cycle times and the customer
requires the alarm sounder to operate for longer periods to
better attract attention.
Where this feature becomes essential is for telephone/relay
activated beacons to function correctly in these parameters.
Factory default for the relay/telephone latch duration switch
setting is 0000.
See table for DIP switch S1 delay timing.
Unit activation period
(s) from start of
activation signal.
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
9) Sounder Tone Selection DIP switch S1
setting
The D1x Alarm Horn Sounders have 64 different tones.
The alarm tone is selected by operation of the tone setting DIP
switch S1 (see fig 5) on the PCB.
Note DIP switch S2 and multistage selection is not possible
with Relay / telephone activation unit.
Default = Switch 2
Not used in this unit.
(ON = 1, OFF = 0)
Figure 8: DIP switch configuration
The tone table (D221-95-001-IS) shows the switch positions for the 64
tones, dependent on the sounder Stage 1 DIP switch S1 setting.
European Safety Systems Ltd. Impress House, Mansell Road, Acton, London W3 7QH
Document No. D157-00-681-IS
DIP Switch S1 Setting
(0000) = All off
0000
1000
0100
1100
0010
1010
0110
1110
1111
Default = Switch 1
S1 – Tone 44
1 1 0 1 0 1
Issue 1
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.
27-04-2023
www.e2s.com
Tel: +44 (0)208 743 8880
Sheet 6 of 6
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