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VdS-approved fire system horn sounders

AlertAlarm D112 alarm horn sounder

Rugged Alert Alarm D112 alarm horn sounder from E2S Warning Signals gains VdS approval

E2S Warning Signals have gained VdS approval and CPR compliance to directive 305/2011/EU for their AlertAlarm D112 alarm horn sounder by testing to EN54-3.

The D112 combines the field-proven electronics of the AlertAlarm A Series with a robust, corrosion-resistant, marine grade LM6 aluminium alloy enclosure, giving greater mechanical and UV protection.


It has a maximum SPL of 119dB(A) at 1m at the nominal 24V DC fire alarm system operating voltage; the CPR compliance is valid for operation from 18–30V DC. The 48V DC version is also compliant.

VdS approval covers the five most commonly used fire alarm warning tones and also confirms that the units operate to specification under conditions of dry and damp heat, cold, shock and vibration.

The aluminium enclosure complies with Type B environmental category making it suitable for outdoor installation, thereby supporting the extension of a fire-detection system into areas beyond the office environment. Other tests include EMC, SO2 corrosion resistance and dust and water ingress.
UL-approved versions of the D112 for general signalling use are also available. For this version, the aluminium enclosure is sealed to IP66, NEMA Type 4, 4X and 3R.
For use in a wide range of signalling applications, the AlertAlarm D112 offers a choice of 45 different alarm tones, with the option of activating a second and third tone via additional control cables.

It is also available as part of the DL112X, in which the horn sounder is integrated with a 5J xenon strobe, or as the DL112H combination unit, where the horn sounder is combined with a high-output, 24-unit LED array beacon.

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