The Orbita MK M-Z alarm devices are designed to generate alarm signals in fire and security alarm systems, to attract the attention of personnel in industrial emergencies. The alarm devices can be used with any fire and security alarm control and monitoring devices. The type and level of explosion protection are 1 Ex db IIC T 6 Gb / Ex tb IIIC T 85 ° C Db, PB Ex db I Mb / 1 Ex db IIC T6 Gb / Ex tb IIIC T85 ° C Db according to GOST R IEC 60079-0-2011. The alarm devices can be used in hazardous areas and rooms of classes 1 and 2 according to GOST IEC 60079-10-1-2011 and GOST IEC 60079-14-2011.
The alarms have two warning stages and different operating modes, each independent of the other. Switching between warning stages is accomplished in one of two ways:
The notification mode is set using a group of microswitches.
The alarms are produced with the following supply voltage:
Distinctive features:
The posts are equipped with explosion-proof cable entries of the KV series, KV TU 27.33.13-138-81888935-2019. The connecting thread of the cable entries is M20x1.5. Cable entries allow the input and output of round cables of various diameters.
Table 1
| Explosion protection marking |
1 Ex db IIC T6 Gb/Ex tb IIIC T85 °C Db, |
| Degree of protection of the shell |
IP67 |
| Climatic performance |
UHL1 |
| Operating temperature range |
-60C<Ta<+70C |
|
Supply voltage: Orbit MK M-Z Orbit MK M-Z 220 |
10.8V - 27V DC ~220V +10% -15% AC 50Hz |
|
Current consumption, no more than: Orbit MK M Z Orbit MK M Z220 |
0.4Adc 0.1Aac |
| Sound pressure level |
117±5 dB |
| Number of alarm stages |
2 |
| Number of sound signals for each stage (see table 2) |
7 |
| Number of sound signal combinations |
42 |
| Time delay for automatic switching to the second stage |
2 min. |
| Body material |
Aluminum alloy Stainless steel |
| Overall dimensions (L x W x H), mm, no more than |
150 x 150 x 102.5 |
| Weight, no more than: |
1.1 kg. |
Table 2
| Signal | Signal Description | Signal type |
| 0 | no sound | |
| 1 | 2.3 kHz siren, frequency modulation ±10% with a period of 1 Hz |  |
| 2 | 2.3 kHz siren, frequency modulation ±10% with a period of 2 Hz |  |
| 3 | 2.3 kHz trill, frequency modulation ±10% with a period of 7 Hz |  |
| 4 | intermittent 2.3 kHz, repetition period 1 Hz |  |
| 5 | intermittent 2.3 kHz, repetition period 2 Hz |  |
| 6 | frequency switching 2..2.3 kHz, period 2 Hz |  |
| 7 | continuous with a frequency of 2.3 kHz |  |
The operating mode is selected by the user using dip switches. Single-stage or two-stage operation is possible. The second stage is activated automatically after a fixed time or by an external control signal. The type of audible alert signal is selected independently for each stage using dip switches (Table 2).
Ordering designation system:
| ORBIT MK M | Z | 220 | - A - | TO |
| 1 | 2 | 3 | 4 | 5 |
Series 001 No. 1868. Certificate of Conformity for Seismic Resistance to GOST 30546 EAEU No. RU D-RU.PA01.B.12629/21. Declaration of Conformity with EAEU TR 037/2016 "On Restricting the Use of Hazardous Substances in Electrical and Electronic Products" EAEU No. RU D-RU.PA01.B.48848/21. Declaration of Conformity to TR CU 020/2011 "Electromagnetic Compatibility of Technical Equipment" Refusal decision No. 21/06/0245 in the certification of TR CU 004/2011 "On the safety of low-voltage equipment" Refusal decision No. 21/06/0245 in certification of TR CU 010/2011 "On the safety of machinery and equipment" EAEU RU C-RU.PB74.B.00259/23. Certificate of Conformity with EAEU TR 043/2017 "On Requirements for Fire Safety and Fire Extinguishing Equipment" EAEU RU C-RU.AZh58.B.02260/22. Certificate of Conformity to TR CU 012/2011 "On the Safety of Equipment for Work in Explosive Environments" Operation manual. Explosion-proof audible fire alarm device ORBITA MK M-Z, ORBITA MK M-Z-220V Certificate of type approval of the Russian Maritime Register of Shipping No. 26.44.01.03587.141. Explosion-proof fire alarms Orbita, Sphere 
