BExCS110-L2 Explosion Proof Alarm Horn & LED Beacon

The flameproof BExCS110-L2 combination alarm horn sounder and LED beacon is suitable for Zone 1, 2, 21 & 22. Approved to IECEx and ATEX standards.

The BExCS110-L2 features sound level ouputs of up to 117dB(A) at 1 metre with a choice of 32 alarm tones and 3 remotely selectable stages. The LED beacon contains an array of 4 high output, multi-function L.E.D.s. with a total of 7 modes of operation - 5 flashing modes and 2 steady modes for use in indicator / status applications. DC voltage versions feature three remotely selectable stages enabling multiple warnings to be signalled from one device. 
The BEx range features enclosures manufactured from corrosion proof, marine grade copper free LM6 aluminium with a chromate and powder coat finish. All models have two M20 cable entries, large termination areas containing in & out terminals and an ingress protection of IP66/67.


Maximum output: 117dB(A) @ 1 metre [108dB(A) @ 10ft/3m]
Nominal output: 110dB(A) @ 1m +/- 3dB - Tone 2 [101dB(A) @ 10ft/3m]
No. of tones: 32 (UKOOA / PFEER compliant)
No. of stages: 3
Volume control: Max. 110dB(A); Min. 72dB(A)- Tone 2
Effective range: 100m/328ft @ 1KHz
Voltages: 24V dc; 48V dc; 115V ac; 230V ac
Stage switching: Negative or positive
LED Beacon:
Source: Array of 4 x High Power Cree® LED's
Modes: 1Hz flash (60 fpm)
1.5Hz flash (90 fpm)
2Hz flash (120 fpm)
Double strike flash
Triple strike flash
High Power Steady
Low Power Steady
Eff. Intensity cd: 87 cd - High Power Steady
Eff. Intensity cd: 160 cd - 1Hz flash
Voltages: 24V dc; 115V ac; 230V ac
Ingress protection: IP66/67
Enclosure matl: Marine grade copper free LM6 Aluminium
Enclosure finish: Phosphated & powder coated
Horn material: High impact UL94 V0 & 5VA FR ABS (Red)
Cable entries: Dual M20 ISO (one stopping plug included)
Terminals: 0.5 - 2.5mm² (20-14 AWG)
Enclosure volume: <2 litres
Line monitoring: Blocking diode included
EOL Min. 500 Ohm 2w, or 3k3 Ohm 0.5w resistor
or diode (DC versions) can be fitted
Grounding stud: M5
Temperature range: -50° to +70°C (-58°F to +158°F)
Relative humidity: 95% - Additional tropicalisation is recommended for applications where both high relative humidity and high ambient temperatures exist
Weight: DC: 4.80kg/10.56Ibs AC: 5.00kg/11Ibs
SPL data +/-3dB(A), Candela with clear lens - at optimum voltage

Current Consumption

  Alarm Horn LED Beacon
Version: Voltage: Current: Voltage: Steady
24V dc +/-25% 265mA 18-54V 240mA 134mA 110mA
115V ac 50/60Hz +/-10% 110mA +/-10% 95mA 78mA 90mA
230V ac 50/60Hz +/-10% 56mA +/-10% 48mA 37mA 45mA

Part Codes

Version: Part code:
Product type: BExCS110L2 Explosion proof
Alarm Horn Sounder & LED Beacon
Type: DPF Ex d
UV stable PC Colour Lens, Flare Horn
Voltage: DC024
24V dc
48V dc
115V ac
240V ac
Cable Entry Type:[e]

2 x M20x1.5mm
2 x 1/2" NPT - adaptors
2 x 3/4" NPT - adaptors
2 x M25x1.5mm - adaptors
1 x 1/2" NPT - adaptor
1 x 3/4" NPT - adaptor
1 x M25x1.5mm - adaptor
M20 stopping plugs for unused entries
supplied with all options
plug material: [m]
Nickel Plated
Stainless Steel
Bracket/Guard material: [s] 1
A2 304 Stainless Steel
A4 316 Stainless Steel
A2 304 St/St with Equip. Tag
A4 316 St/St with Equip. Tag (304)
Product version: [v] A1
Default - IECEx & ATEX
Stage programmable - IECEx & ATEX
Enclosure colour: [x] R
Red RAL3000
Special - contact E2S
Lens colour: [y] A

Beacon modes

Stage 1:
[On board]
Stage 2:
Stage 3:
Steady High Power Flashing 1Hz Triple Strike
Steady Low Power Flashing 1Hz Triple Strike
Flashing 1Hz 2x Flash 2Hz Triple Strike
Flashing 1.5Hz Flashing 2Hz Double Strike
Flashing 2Hz Triple Strike Triple Strike
Double Strike Steady High Power Triple Strike
Triple Strike Flashing 2Hz Double Strike
Note: Remote second and third stage on DC units only


  • II 2G Ex d IIB T5 Gb Ta. -50°C to +50°C
  • II 2G Ex d IIB T4 Gb Ta. -50°C to +70°C
  • II 2D Ex tb IIIC T70°C Db Ta. -50°C to +40°C
  • II 2D Ex tb IIIC T85°C Db Ta. -50°C to +55°C
  • II 2D Ex tb IIIC T100°C Db Ta. -50°C to +70°C

Effective Candela lens colour factor

Amber Blue Clear Green Red Yellow
0.70 0.24 1.00 0.25 0.23 0.93

Tone Table

Stage 1 WAV file Frequency Description. Stg 2 Stg 3
T 1   Continuous 1000Hz Toxic Gas Alarm T 31 T 11
T 2   Alternating 800/1000Hz at 0.25s intervals T 17 T 5
T 3   Slow Whoop 500/1200Hz at 0.3Hz with 0.5s gap repeated T 2 T 5
T 4   Sweeping 800/1000 at 1Hz T 6 T 5
T 5   Continuous at 2400Hz T 3 T 27
T 6   Sweeping 2400/2900Hz at 7Hz T 7 T 5
T 7   Sweeping 2400/2900Hz at 1Hz T 10 T 5
T 8   Siren 500/1200/500Hz at 0.3Hz T 2 T 5
T 9   Sawtooth 1200/500Hz at 1Hz T 15 T 2
T 10   Alternating 2400/2900Hz at 2Hz T 7 T 5
T 11   Intermittent 1000Hz at 0.5Hz General alarm T 31 T 1
T 12   Alternating 800/1000Hz at 0.875Hz T 4 T 5
T 13   Intermittent 2400Hz at 1Hz T 15 T 5
T 14   Intermittent 800Hz 0.25s on 1s off T 4 T 5
T 15   Continuous at 800Hz T 2 T 5
T 16   Intermittent 660Hz 150mS on, 150mS off T 18 T 5
T 17   Alternating 544Hz (100mS)/440Hz(400mS) T 2 T 27
T 18   Intermittent 660Hz 1.8s on, 1.8s off T 2 T 5
T 19   1400Hz to 1600Hz sweep up over 1s -1600Hz to 1400Hz sweep down over 0.5s T 2 T 5
T 20   Continuous 660Hz T 2 T 5
T 21   Alternating 554/440Hz at 1Hz T 2 T 5
T 22   Intermittent 554Hz at 0.875Hz T 2 T 5
T 23   800Hz pulsing at 2Hz T 6 T 5
T 24   Sweeping 800/1000Hz at 50Hz T 29 T 5
T 25   Sweeping 2400/2900Hz at 50Hz T 29 T 5
T 26   Simulated bell sound T 2 T 1
T 27   Continuous 554Hz T 26 T 5
T 28   Continuous 440Hz T 2 T 5
T 29   Sweeping 800/1000Hz at 7Hz T 7 T 5
T 30   420Hz repeating 0.625s on, 0.625s off Australian alert signal T 32 T 5
T 31   1200/500Hz at 1 Hz Prepare to Abandon Platform T 11 T 1
T 32   Sweeping 500/1200Hz 3.75s on, 0.25s off 15Hz T 26 T 1
Country specific or custom tone configurations and alarm frequencies are available upon request.