The annunciators comply with the requirements of TU 26.30.50-119-81888935-2019 and are designed to provide the possibility of giving sound alarm signals in fire alarm and fire extinguishing systems when working together with receiving and control devices.
Degree of protection of the Annunciator against water and dust according to GOST 14254-96 IP66/IP67.
The annunciators are designed for operation at an ambient temperature from minus 60°C to plus 70°C. Climatic version OM (MU), UHL (NF), HL (F) category 1, atmosphere type II-IV according to GOST 15150, relative air humidity 100% at a temperature not exceeding 25°C and 95% non-condensing at a temperature not exceeding 40°C.
Housing material - corrosion-resistant steel 12X18H10T.
In terms of resistance to high frequency sinusoidal vibrations, the Annunciator belongs to the N2 design group according to GOST 12997-84.
According to the method of protecting a person from electric shock according to GOST R 51350-90, the Annunciator corresponds to I (Orbit MK M-Z-220V) and III class (Orbit MK M-Z).
In terms of electromagnetic compatibility, the siren complies with the requirements
GOST R 50009-2000 and NPB 57-97 for the second degree of rigidity.
The design of the Annunciator ensures their fire safety in accordance with GOST 12.1.004-91 and NPB 77-98.
The annunciator in non-operating condition (storage, transportation and during breaks in operation) complies with GOST 12997-84 and storage and transportation conditions 4 in accordance with GOST 15150-69.
The annunciators are equipped with two cable glands of the KV, KV series TU 27.33.13-359-81888935-2019. Connecting thread of cable glands M20x1.5. Cable glands allow you to enter and exit round cables of various diameters:
| Characteristics | Meaning |
| Sheath protection degree | IP66/IP67 |
| Climatic performance | OM (MU), UHL (NF), CL (F) |
| Operating temperature range | -60С<Ta<+70С |
| Rated supply voltage (allowable range) | DC 24V (10.8V - 30VDC) |
| Alternating current 220V AC 50-60Hz (165-250Vrms) | |
| Current consumption (rated voltage), not more than: | When powered by direct current 24V 0.3Adc |
| When powered by AC 220V 0.07Aac | |
| Maximum current consumption (minimum supply voltage), not more than: | When powered by direct current 10.8V 0.7Adc |
| When powered by AC 165V 0.1Aac | |
| Cross section of connected wires | 0.5-2.5mm2 |
| Sound pressure level at resonant frequency | 117dB±5dB |
| Number of alarm stages | 2 |
| Operating modes | Automatic switching to the second stage with a time delay |
| Warning level selection with external control signal | |
| The number of sound signals of each stage (see table 2) | 7 |
| Number of combinations of sound signals | 42 |
| Delay time for automatic switching to the second stage | 1 min; 3 min; 5 minutes |
| Housing material | Stainless steel |
| Overall dimensions without cable glands (ФхВ), no more | D150 x 105 mm |
| Weight, not more than: | 5.5kg |
The mode of operation and the type of alert signal are selected by the user using dip-switches. Two modes of operation are possible: with automatic switching to the second stage of notification after a specified time; selection of the warning stage by means of an external control signal. The type of sound notification is selected by the user independently for each stage using dip-switch groups. Each stage has a separate group consisting of three dip switches.
| Signal number | Switch position (0=OFF; 1=ON) | Signal description | Signal type |
| 0 | 000 | no sound | |
| 1 | 001 | siren 2.3kHz, frequency modulation ±10% with a period of 1Hz |  |
| 2 | 010 | siren 2.3kHz, frequency modulation ±10% with a period of 2Hz |  |
| 3 | 011 | trill 2.3kHz, frequency modulation ±10% with a period of 7Hz |  |
| 4 | 100 | intermittent 2.3kHz, repetition period 1Hz |  |
| 5 | 101 | intermittent 2.3kHz, repetition period 2Hz |  |
| 6 | 110 | frequency switching 2..2.3kHz, period 2Hz |  |
| 7 | 111 | continuous at 2.3kHz |  |
| Annunciator with direct current supply Orbita MK M OP-Z | |
| Switching method | Voltage supply between the input "ST2" (7.8) and the minus of the power supply "-" (4.5) (Fig. B1) |
| Active state of external control signal | High |
| Active level of control signal, not less than | 6B |
| The maximum allowable voltage applied to the control input "ST2" relative to the minus supply "-" | 30V |
| Input current at active signal level, no more | 0.3mA |
| Annunciator powered by alternating current Orbita MK M OP-Z-220 | |
| Switching method | Voltage supply to isolated control inputs "S2L" (5.6) and "S2N" (7.8) (Fig. B2) |
| Active state of external control signal | High |
| Control signal level for activation, not less than | 165you |
| Maximum allowable voltage applied to the control input | 250you |
| Input current at active signal level, no more | 2mA |
| Isolation voltage between control input and power input | 1500Vrms |
An example of a designation entry when ordering:
| ORBIT MK M OP-Z | - 220 - | H |
| 1 | 2 | 3 |
Cable gland type designation:
K - for open cable laying with a diameter of 6.5-13.9 mm;
1/2TV - for laying a cable with a diameter of 6.5-13.9 mm in a pipe with a connecting internal thread G1/2;
1/2ТН - for laying a cable with a diameter of 6.5-13.9 mm in a pipe with a connecting external thread G1/2;
B - for laying an armored cable with an inner sheath diameter of 6.5-13.9 mm, an outer sheath of 15-21 mm;
KM10 - for laying a cable with a diameter of 3.1-8.6 mm in the RZTsH-10 metal hose;
KM12 - for laying a cable with a diameter of 3.1-8.6 mm in the RZTsH-12 metal hose;
KM15 - for laying a cable with a diameter of 6.1-11.7 mm in the RZTsH-15 metal hose;
KM20 - for laying a cable with a diameter of 6.5-13.9 mm in the RZTsH-20 metal hose.
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