The GNExS2H is a very high output 127dB(A) IECEx and ATEX certified alarm horn sounder featuring an enhanced re-entrant flare horn. The robust GRP (glass reinforced polyester) enclosure is approved for Zone 1 & Zone 2 explosion proof signalling applications.

 

Description
Featuring 64 alarm tone sounds, each of the available 4 stage/channels can be remotely triggered. Class D amplification provides a high sound output with a choice of two power modes. The threaded flameproof joint, multiple cable entries and duplicated, pluggable termination simplifies both installation and routine maintenance. SIL1 & SIL2 Route 2H compliant to IEC61508 (2010) as standard.

 

Features
Maximum sound pressure level output of 126dB(A)
Choice of 64 alarm tone frequencies
4 remotely selectable alarm stages/channels
Positive or negative line stage/channel switching
Automatic synchronisation on multi-sounder system
Ratchet adjustable 316 stainless steel bracket
Triple cable entries
Available with custom tone configurations and frequencies
Robust corrosion proof GRP (glass reinforced polyester) enclosure

 

Approvals
ATEX certificate: SIRA 13ATEX1139X,
IECEx certificate: IECEx SIR 13.0029X,
TR-CU Ex EAC certificate: RU C-GB.AA71.B.00109
INMETRO IEx 20.0050X
SIL1 & SIL2 compliant to IEC61508 (2010)

 

Coding
IECEx / ATEX
II 2G Ex d IIC T4 Ta. -60°C to +50°C
II 2G Ex d IIC T3 Ta. -60°C to +58°C
II 2G Ex d IIB T6 Ta. -60°C to +50°C
II 2G Ex d IIB T5 Ta. -60°C to +58°C

 

Specification
Maximum output: High power level: 127dB(A) @ 1 m +/- 3dB [118dB(A) @ 10ft/3m +/- 3dB]
Medium power level: 122dB(A) @ 1 m +/- 3dB [113dB(A) @ 10ft/3m +/- 3dB]
Nominal output: High power level: 124dB(A) @ 1m +/- 3dB [115dB(A) @ 10ft/3m] +/- 3dB
Medium power level: 119dB(A) @ 1m +/- 3dB [110dB(A) @ 10ft/3m] +/- 3dB
No. of tones: 64 (UKOOA / PFEER compliant)
No. of stages: 4
Volume control: Full range
Effective range: >350m/1148ft @ 1KHz
Voltages DC: 24Vdc (10-30vdc), 48vdc (38-60Vdc)
Voltages AC: 230Vac (100-260Vac)
In-rush: 815mA within 4ms @ 24Vdc
Stage switching: DC units: positive or negative
AC units: common supply line
Safety Integrity Level: SIL1 and SIL2 Route 2H IEC61508 (2010)
Ingress protection: EN60529: IP66
Enclosure material: UV stable GRP (glass reinforced polyester)
Enclosure colour: Natural Red
Enclosure finish: Natural – can be painted in alternative colours
Cable entries: 2 x M20x1.5mm
Stopping plug included
Stopping plugs: Brass, Nickel Plated or Stainless Steel
Terminals: 0.5 – 2.5mm² (20-14 AWG)
Pluggable & duplicated terminals
Line monitoring: Diode polarized for use in supervised circuits
Blocking diode for reverse polarity monitoring
Ground/Earth stud: M4
Line monitoring: Blocking diode included
EOL Min. 500 Ohm 2W, or 3k3 Ohm 0.5W resistor
or diode (DC versions) can be fitted
Enclosure volume: <2 litres
Installation temp: -50° to +70°C (-58°F to +158°F)
Storage temp: -50° to +70°C (-58°F to +158°F)
Relative humidity: 99%
MTBF DC: 93.92 years / 822,706 hours – MIL 217
MTBF AC: 46.66 years / 408,508 hours – MIL 217
Weight: DC: 3.00kg/6.6Ibs AC: 3.20kg/7.04Ibs