E2S HMA121 Electronic Horns

E2S HMA121 Electronic Horns


E2S HMA121 Electronic Horns for Industrial Signalling Applications

Applications and users that have traditionally demanded conventional electromechanical claxons, sirens, buzzers and bells can now choose the next generation alternative. The technology employed in the E2S H range features the latest in amplifier and digital to analogue conversion technology. The E2S H series of products faithfully reproduce the sounds made by legacy electromechanical signalling devices but in a modern, reliable and cost effective way. With output levels of up to 124dB(A) at 1 meter the HMA121 surpasses legacy electromechanical devices in performance and effectiveness; The HMA121 is also continuously rated, requires zero maintenance and the signal quality will not degrade with age.


  • Operational Characteristics: 
– Electronic horn/bell with 5 commonly used electromechanical sounds with 3 stage alarm.
– Accurately reproduces electromechanical horn and bell sounds.
– Sound Output: 121dB @ 1m at nominal voltage.
– Sound Frequency: 5 tones selectable by DIP switches (2nd and 3rd stage by terminals).
– Automatically synchronizes on multi-sounder systems (synchronization only occurs when sounders are connected to the same power supply).
– Protection Rating: IP66.
– Volume control (124dB max. – 115dB min.).
– Temp Rating: -25 to +55 degrees Celsius.
– Rating: Continuous.
– Cable Entry: 2 x M20.
– Construction: Flame retardant ABS; UV stabilized.


Order Code Description
ESS8210  HMA121 horn, 24VDC, 1.0A.
ESS8220  HMA121 horn, 110VAC, 600mA.
ESS8230  HMA121 horn, 230VAC, 500mA.



Tone Description Stage 1 Stage 2 Stage 3
1  Industrial hooter (klaxon).  Tone 1  Tone 3  Tone 5
2  Trumpet horn – medium note.  Tone 2  Tone 1  Tone 5
3  Trumpet horn – high note.  Tone 3  Tone 1  Tone 5
4  Buzzer.  Tone 4  Tone 2  Tone 5
5  Bell.  Tone 5  Tone 1  Tone 2
  • (please see linked PDF’s for further information)