BSH-40

Purpose in the course-information channel

The documented product name defines BSH-40 as a unit that participates in synchronizing course information. In an installed avionics system, this class of block works between course sources, signal-processing equipment and the receiving control or indication channels. The exact signal format and terminal functions depend on the system execution and must be taken from the BSH-40 passport or the aircraft wiring documentation.

System interfaces and associated equipment

BSH-40 should be checked together with the course sensor or heading reference, the switching and interface blocks, the indicator or automatic-flight-control consumer, the applicable supply circuits and the aircraft harness. Related units in the same catalogue include the BSK-S synchronization and switching unit and BSDT trajectory-sensor interface unit; these links show system context and do not imply interchangeability.

Identification and technical data

Open aviation catalogues confirm the designation and the function “course synchronization unit”, but they do not provide a reliable aircraft effectivity list, connector assignment, dimensions or electrical limits. Those fields are deliberately not filled with values from similarly named equipment. For a replacement, compare the Cyrillic marking БСХ-40, drawing number, series, connectors, mounting and the system named in the aircraft records.

Inspection and ordering

Inspect the enclosure, rack attachment, connectors, contact condition, seals and every line of the nameplate before applying power. Bench testing requires the approved diagram and test procedure for the exact execution. An enquiry should state the complete marking, aircraft or system, quantity, required condition, documentation and whether mating connectors or mounting hardware are needed. More related units are listed under Electronic Control Units.