Advisory signal unit
BU-1
Price on request
Advisory signal unit
Partner Stock
Description
BU-1 advisory signal unit is a component of the SAS-4-9 onboard alerting system and is used to deliver operational advisory messages to the flight crew regarding system status changes, subsystem activation and other non-emergency events.
BU-1 receives discrete signals from aircraft systems through relay contacts and sensor channels, processes them, and transmits command outputs to advisory annunciators and indicator lamps in the cockpit.
Unlike emergency units, BU-1 does not generate caution or warning alerts — its function is limited to service, state and confirmation indications that support situational awareness during all phases of flight.
The unit operates together with the BAP-1 (emergency/warning unit) and BK-7 (signal switching unit), forming the complete SAS-4-9 annunciation suite installed on Yak-42, Il-86 and other compatible aircraft types.
BU-1 maintains operability under reduced power supply conditions and is designed for continuous service under normal temperature and vibration loads.
Depending on configuration, BU-1 may be delivered with or without a mounting frame.
Details
Purpose: Processing and output of advisory (non-emergency) cockpit signals
Systems: SAS-4-9 alert and annunciation system
Application: Yak-42, Il-86 and compatible aircraft
Product Type: Advisory signal processing unit
Power Supply (Normal): 24–29.4 V DC
Power Supply (Emergency): Down to 18 V
Power Consumption: Not more than 7 W per channel at 27 V
Number of Inputs: Up to 30 discrete input signals
Weight: Not more than 2.0 kg
Package Contents: Mounting frame when applicable (included depending on configuration)
Material Content: Gold 0.289 g; silver 61.83 g; palladium 0.117 g; aluminum 0.6 kg
Installation: Avionics mounting frame / rack installation
Condition: As applicable
Documentation: Passport 632.068.008 PS; SAS-4-9 consolidated documentation
Payment & delivery
All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.
In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.
Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.
Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.
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.
- Description
- Details
- Payment & delivery
BU-1 advisory signal unit is a component of the SAS-4-9 onboard alerting system and is used to deliver operational advisory messages to the flight crew regarding system status changes, subsystem activation and other non-emergency events.
BU-1 receives discrete signals from aircraft systems through relay contacts and sensor channels, processes them, and transmits command outputs to advisory annunciators and indicator lamps in the cockpit.
Unlike emergency units, BU-1 does not generate caution or warning alerts — its function is limited to service, state and confirmation indications that support situational awareness during all phases of flight.
The unit operates together with the BAP-1 (emergency/warning unit) and BK-7 (signal switching unit), forming the complete SAS-4-9 annunciation suite installed on Yak-42, Il-86 and other compatible aircraft types.
BU-1 maintains operability under reduced power supply conditions and is designed for continuous service under normal temperature and vibration loads.
Depending on configuration, BU-1 may be delivered with or without a mounting frame.
Purpose: Processing and output of advisory (non-emergency) cockpit signals
Systems: SAS-4-9 alert and annunciation system
Application: Yak-42, Il-86 and compatible aircraft
Product Type: Advisory signal processing unit
Power Supply (Normal): 24–29.4 V DC
Power Supply (Emergency): Down to 18 V
Power Consumption: Not more than 7 W per channel at 27 V
Number of Inputs: Up to 30 discrete input signals
Weight: Not more than 2.0 kg
Package Contents: Mounting frame when applicable (included depending on configuration)
Material Content: Gold 0.289 g; silver 61.83 g; palladium 0.117 g; aluminum 0.6 kg
Installation: Avionics mounting frame / rack installation
Condition: As applicable
Documentation: Passport 632.068.008 PS; SAS-4-9 consolidated documentation
All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.
In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.
Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.
Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.
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.