ALMAZ-UPM

ALMAZ-UPM voice warning equipment on board aircraft

ALMAZ-UPM is onboard aircraft voice warning equipment designed for automatic reproduction of pre-recorded voice messages. The unit is used to inform the flight crew about emergency, dangerous and operational situations detected by aircraft systems. When required by the system configuration, messages may also be transmitted to ground services through onboard radio equipment. In service, ALMAZ-UPM works as the main voice message playback unit in the aircraft warning and annunciation system.

Automatic message playback by ALMAZ-UPM

The main function of ALMAZ-UPM is to receive commands from aircraft systems and reproduce the corresponding voice message. These commands may come from discrete signal lines or through serial digital data exchange. The message itself is stored in the unit memory and is played back automatically when the related condition is detected. This allows the crew to receive a clear spoken warning instead of relying only on lamps, indicators or sound tones. In emergency situations, this helps reduce the time needed to identify the problem.

ALMAZ-UPM in crew alerting systems

ALMAZ-UPM is connected to aircraft intercom and audio systems, including aviation headsets, SPU / intercom equipment and radio stations depending on installation. Messages are reproduced through analog audio outputs with signal levels matched to the connected equipment. The unit can be used for cockpit warnings, system-status information and priority voice alerts. If several commands arrive at the same time, the warning logic may prioritize messages by importance, so emergency messages are not lost among less critical notifications.

Digital memory and multilingual support of ALMAZ-UPM

Unlike older cassette or tape-based voice informers, ALMAZ-UPM stores voice messages in solid-state memory. This eliminates moving tape mechanisms and improves reliability in aircraft operation. Depending on the version and configuration, the unit may support two or five message languages and a large voice dictionary. The language set and exact list of recorded messages are defined by the aircraft system requirements. This is important for export aircraft, mixed crews or platforms operated under different language standards.

Command interfaces of ALMAZ-UPM

ALMAZ-UPM can process a large number of command inputs. The equipment supports discrete inputs and serial digital commands based on the ARINC 429 data bus standard, depending on version. It may also output command information through ARINC 429. This allows the unit to work not only with simple warning contacts, but also with more complex avionics and onboard information systems. During troubleshooting, it is important to check whether the command arrives as a discrete signal, a serial command, or through the aircraft warning logic.

ALMAZ-UPM power supply and emergency operation

The unit operates from the aircraft DC power network and supports normal and emergency supply ranges. This matters because voice warnings must remain available during abnormal electrical conditions, when the crew needs information most. Power consumption is low for onboard avionics equipment, but correct voltage, grounding, connector condition and circuit protection must still be checked. If the unit powers up but does not reproduce a message, the fault may be in the command line, audio output path, message memory, intercom connection or aircraft warning logic.

Aircraft application of ALMAZ-UPM

ALMAZ-UPM is used on civil and military aircraft and helicopters as part of voice warning and crew information systems. It is associated with platforms such as Mi-8 / Mi-17 family helicopters and other aircraft where onboard voice alerting is required. The equipment may replace older voice informers such as RI-65 in modernization projects, depending on aircraft configuration and approved documentation. Exact applicability should be checked by aircraft equipment list, wiring diagram and the required message dictionary.

Supply and inspection notes for ALMAZ-UPM

For procurement or replacement, the full designation ALMAZ-UPM should be specified together with the required version, message language set and aircraft application. Since the unit contains stored voice messages, compatibility is not limited to the connector and power supply. The dictionary, command logic, ARINC configuration, output levels and aircraft audio system must match the target installation. Before installation, the unit should be checked for housing condition, connectors, markings, power-up behavior, message playback, audio output and available technical documentation.

Product Type: Onboard aircraft voice warning equipment with digital message storage
Model / Part Number: ALMAZ-UPM
Alternative Designation: Алмаз-УПМ
Purpose: Automatic reproduction of voice messages for informing flight crew and ground services about onboard situations
Function: Playback of pre-recorded voice messages; multilingual support; processing of discrete and serial commands
Application / Where Used: Aircraft voice warning, annunciation and crew information systems
System / Installation Area: Onboard crew voice alerting systems, intercom / SPU audio systems, aircraft warning systems
System Role: Main voice message reproduction and warning unit
Compatible Aircraft / Equipment: Mi-8 / Mi-17 family helicopters, civil and military aircraft depending on configuration
Possible Replacement / Modernization Role: Replacement of older tape or cassette voice informers such as RI-65, where approved by aircraft documentation
Number of Languages: 2 / 5 depending on version
Total Number of Messages: 56 / up to 1024 depending on version
Continuous Playback Duration: Up to 23 minutes
Audio Quality: 16 Bit, 11025 Hz
Discrete Command Inputs: 56 / 80 depending on version
ARINC 429 Serial Command Inputs: Up to 10 depending on version
ARINC 429 Serial Command Outputs: Up to 1 depending on version
Analog Audio Outputs: 3 / 4 depending on version
Headset Output Level: 3–15 V at 1500 ±90 Ohm
AVSK / Intercom Output Level: 0.3–0.8 V at 600 ±90 Ohm
Radio Station Output Level: 0.2–0.5 V at 250 ±50 Ohm
Supply Voltage, Operating Mode: 24–29.4 V DC
Supply Voltage, Emergency Mode: 18–31 V / 18–33 V DC depending on version
Power Consumption: 10 W
Operating Temperature Range: −55 to +60 °C
Dimensions: 201 × 170 × 196.6 mm / 90.5 × 295 × 224 mm depending on version
Weight: Not more than 3.2 kg / 2.5 kg depending on version
Technical Documentation: Product passport, installation documentation, wiring data and aircraft maintenance documentation as applicable

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.