Audible Alarm
Explosion-proof universal modular emergency alarm units UMK-A-Z are designed for audible signaling of emergency situations in alarm systems installed indoors or outdoors, in explosion hazardous areas, areas with combustible dust hazards, as well as in areas with possible flame exposure to the equipment.
Technical Specifications:
| Explosion Protection Markings: | |
| Gas Markings: | 1Ex d IIC T6…T3 Gb, |
| Dust Markings: | Ex tb IIIC T85 C…T200C Db |
| Ingress Protection: | IP65/66 |
| Rated Voltage: | 12DC, 24 DC, 36 DC, 48 DC, 60 DC, 110 AC, 220 AC, 240 AC, 254 AC |
| Sound Pressure Level up to: | 120 ± 2 dB (up to 129 dB upon request) |
| Number of Stages (Input Channels): | 1 to 2 (up to 8 upon request) |
| Number of Tones: | up to 32 |
| Frequency Range: | from 400 Hz to 8000 Hz, or other upon request |
| Permissible Ambient Temperature: | -63 to +80ºС |
| Climate Design: | NF1 by default; other options (MU1, U1, W1) on request |
| Material: | low-copper aluminium (default) or stainless steel |
| Default Colour: | light grey RAL 7035, other colours on request |


Overall and mounting dimensions are shown in the drawings.
Drawing:

Ordering Code:
UMKA coding for simple single products:
Audible Alarm
UMK-А – Z – X1 – X2 – X3 – Х4 – X5 – Х6 – Х7(А (Xa/Na) – B (Xb/Nb) – C (Xc/Nc) – D (Xd/Nd)) – X8 – Х9 – X10 – Х11;
Z – buzzer-type audible alarm (electrodynamic sound source with up to 32 tones and 2 stages);
Zn – stainless steel version.
X1 – design:
1 – with a horn,
X2 – power 5/10/15/25 W. Other versions – upon request.
X3 – voltage:
- AC (50 or 60 Hz):
- 110V, 220V,
- DC:
- 12V, 24V,
- 36V, 48V, 60V
X4 – sound pressure not less than 110, 120, 125 dB.
X5 – number of stages (1,2) up to 8 upon request;
X6 – number of tones (melodies) – 1, 2, 4, 16, 32.
X7 – gland characteristics:

A (Xa/Na) – side A, type and number of cable glands;
B (Xb/Nb) – side B, type and number of cable glands;
C (Xc/Nc) – side C, type and number of cable glands;
D (Xd/Nd) – side D, type and number of cable glands;
X8 – fastening options:
1 – wall/ceiling mounting swing bracket;
2 – pipe bracket;
4 – mounting holes in the enclosure (by default)
Options:
X9 – painting the enclosure in a customer-specified RAL colour (default: grey RAL 7035);
X10 – nameplate with customer text (e.g. positional designation or project number);
X11 – visor;
* If any position such as X1, X2, etc., is not required, use “0”. If several positions at the end of the code (e.g., “options”) are not required, simply finish the code.
For example, explosion-proof audible alarm, external dimensions 122×122×187 mm (type UMK-A – Z), one metal VVKm32 gland for non-armoured cable, installed at the top of the enclosure, buzzer type, with horn, 10 W power, 24 V DC, sound pressure 105 dB, two-stage, 32 tones (melodies), without options (visor, colour, or nameplate) is designated as follows: °
UMK-A – Z – 1 – 1 – 10W – 24V – 105 – 2 – 32 – (0/0) – A (VVKm32/1).
TR CU 012/2011: EAEU RU C-RU.AZH.V.00241/20
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