Exd sound signaling device PGZ-SIRENA1 (EMHS) (electrodynamic siren)

Sound signaling devices are applied in areas, where sound and speech signals for warning are required, as well as in areas with potentionally explosive atmosphere.

Explosion-proof electrodynamic sound signaling device PGZ-SIRENA1 is intended for continuous round-the-clock operation in a stand-by mode (possibility to send sound alarm signals) in security, fire and other signaling systems. Maximum level of sound pressure (sound signal is modulated as per the apmlitude) at rated supply voltage is not less than 114 Db. Pattern of direction for sound signaling device PGZ-SIRENA1 is circular.

By default, the device is supplied without mounting bracket. To add mounting bracket to the assembly, /SKOBA option must be specified in the marking when ordering.

Scope of application – outdoor and indoor hazardous areas and pits non-hazardous with gas or dust, as per explosion protection marking, GOST 30852.13-2002 (IEC 60079-14:1996), regulating application of electrical equipment in hazardous and non-hazardous areas at dangerous production facilities of I, II, III, IV hazard class supervised by Rostechnadzor and national technical supervision bodies of the CIS countries.

PGZ-SIRENA1-109

PGZ-SIRENA1-114

Type	Number of sounds	Voltage, V	Current, А	Frequency, Hz	Volume, dB	Mass, kg
PGZ-SIRENA1-109-12DC	1	12	15	1150	109	2.3
PGZ-SIRENA1-109-24DC	1	4	8,5	1250	109	2.3
PGZ-SIRENA1-109-115AC	1	~115	2	1300	109	2.3
PGZ-SIRENA1-109-230AC	1	~230	1	1310	109	2.3
PGZ-SIRENA1-114-12DC	1	12	12	650	114	2.5
PGZ-SIRENA1-114-24DC	1	24	6,3	650	114	2.5
PGZ-SIRENA1-114-115AC	1	~115	2	650	114	2.5
PGZ-SIRENA1-114-230AC	1	~230	1	650	114	2.5

Example: PGZ-SIRENA1-114-230AC-KNVTV2-TU 3400-005-72453807-07

According to GOST R IEC 60073-2000, sound signals may be applied in cases when:

– it is required to draw an operator‘s attention;

– coded information will be short, simple and transient;

– the information requires immediate time-dependent answer;

– application of visual signal is limited;

– the situation is critical and it requires additional or redundant information.

The sound signal may consist of pure or complex tones (not more than 5 signals). The sound signal must be audible and easily recognized by operators and people in the set area of signal reception and at set background noise conditions. Signals must be different from the emergency signal, as per ISO 8201 part 7.

Sound signals of different types must be clearly distinguishable from each other.

Limited audibility of signals must be also taken into account in cases, when employees wear protective devices or earphones, as well as people with hearing impairment.

Selection of emergency sound signaling device

General rules of identification of sound signals when coding the information:

1. Continuous, sharply intensifying sound means danger (danger to the safety of people or equipment), critical (process status), malfunction (equipment status).

2. Intermittent sound with constant interval means attention (safety of people or equipment), transient (process status), transient (equipment status).

3. Continuous sound with permanent level means safety (safety of people or equipment), normal (process status), normal (equipment status).

4. Interchanging sounds have special meaning, as per technological documentation.

5. Other sounds do not have special meaning and cannot be easily identified by operators, not desirable.

To prevent sound overpressure of operators, it is required to use minimum amount of sounds of different kind in this application.

Intermittent sound signal may be used in some particular cases (for example, in case of change of dangerous or transient state to a safe state). 

Sound signals should not be applied in case of safe state (silence).