BKP RSBN Switching Unit

Documented system role

BKP is documented in more than one RSBN-7S installation. One description routes RSBN-7S and Kurs-MP-2 landing information to the SAU-1T-2B automatic-control system; another aircraft manual connects an RSBN-7S installation with Kurs-MP-70 and SAU-1T-2BT. Equipment lists also associate a BKP switching block with RSBN-2SA. These are installation variants, not interchangeable names, so the aircraft and exact RSBN execution must be identified before installation. The broader subject is radio navigation.

Identification and compatibility

The base marking BKP / БКП is not enough to establish a universal replacement. Compare the plate, drawing number, series, connectors, mounting and the aircraft wiring diagram. BKP-2 Series 3 is a separate catalogue position and must not be treated as interchangeable solely because it shares the same abbreviation. The title now states the function clearly while preserving the existing URL.

Inspection and supply

Inspect the enclosure, connector keys and contacts, mounting, seals and all markings. Functional checks require the approved RSBN test procedure and confirmed interfaces to the navigation and automatic-control systems. An enquiry should state the source RSBN set, aircraft, complete plate data, quantity, condition and required documents. Related system electronics are available under Electronic Control Units.

BKP connections in documented RSBN-7S installations

One documented BKP assembly includes a relay section and interfaces RSBN-7S with TKS-P, the onboard computer, Kurs-MP-2 and SDK-67 equipment; its landing channel routes outputs to SAU-1T-2B and cockpit instruments and automatically uses the second channel after a first-channel failure. A separate aircraft manual documents an RSBN-7S installation together with Kurs-MP-70 and SAU-1T-2BT. The card records both configurations without combining them: the applicable one must be selected from the exact aircraft wiring.