Kongsberg KR-50/2 Cabin Alarm Panel

The Kongsberg KR-50/2 Cabin Alarm Panel (historically engineered in collaboration with Autronica) is a high-reliability, marine-grade safety interface designed for installation in accommodation spaces, crew cabins, and public areas aboard commercial vessels. Operating as a core edge device within the integrated vessel management framework—including dead-man alarm configurations and decentralized fire detection topologies—the KR-50/2 ensures localized visual and audible warning distribution.

Constructed with a ruggedized, injection-molded or cast aluminum alloy chassis, this unit resists the mechanical stresses, continuous vibration, and thermal fluctuations characteristic of marine engine room boundaries and accommodation superstructures. The front interface features high-visibility LED indication zones and mechanical tactile feedback buttons engineered for immediate operator acknowledgement and system test functions under emergency dark-ship conditions.

Model Details:

• Brand: Kongsberg Maritime / Autronica
• Model Name: KR-50/2
• MPN / Manufacturer Part Numbers:
• KR-50/2
• 7212-042.0006
• 7211-468.0008
• KRC-2/6

Technical Specifications: KR-50/2 ALARM PANEL

Part Number Cross-References:

• Kongsberg 273605 (KR-50/4 related series)
• Autronica KR-50 / KR-50/S / KR-50/2UR

Salient Features

1. Dual-Branded Marine Legacy: Developed through the technological partnership of Kongsberg Maritime and Autronica automation, allowing easy drop-in connectivity with K-Chief and Autrosafe systems.
2. Integrated Acoustic Transducer: Built-in piezo buzzer with a rating of >75 dB(A) at 1 meter for speedy crew awakening during local alarm conditions.
3. Low-Power 24VDC Architecture: Designed for conventional maritime secondary battery loops, with no major parasitic pull on key UPS lines.
4. Tactile Acknowledge Switch: Front facing, high-cycle mechanical push button for positive action, to prevent accidentally resetting or missing watches.
5. Corrosion Resistant Enclosure – Compact marine stabilized enclosure with integrated terminal strip block arrangement to allow secure termination in restricted bulkhead areas.

Applications

• Dead Man / Engineer’s Watch Alarm Systems: Deployed in officer and engineer cabins to act as the secondary or tertiary call stage if the primary bridge watch alarm is unacknowledged.
• Decentralized Fire & Smoke Indication: Localized cabin-level repeater alerts linked directly to main Autronica fire control loops.
• Machinery Space Extension Signaling: Provides extension of critical group alarms (e.g., low steering gear oil, main engine trip) directly to the duty engineer’s living quarters.
• Emergency Muster Alarm Distribution: General alarm replication interface within public spaces, dry stores, and mess decks.

Terminal Allocations & Wiring Guide

• Terminal 1 (+24VDC): Main positive power input from the central safety loop or local distribution board.
• Terminal 2 (0V / GND): Common negative return line.
• Terminal 3 (Line In / Signal +): RS-485 / Current-loop serial data or discrete trigger line from the main controller module (e.g., KEC-2/3 or KEC-2/6).
• Terminal 4 (Line Out / Signal -): Pass-through data line for daisy-chain topology to subsequent cabin units.
• Terminal 5/6 (Dry Contact / Extension): Auxiliary dry contacts for interfacing with external flashers or auxiliary vibrating bed pads.

Equipment Compatibility

• Host Control Modules: Autronica KEC-2/3, KEC-2/6, and BX-20 Fire Alarm Panels.
• Integrated Automation Systems (IAS): Kongsberg K-Chief 500, K-Chief 600, and AutoChief propulsion control architectures.
• Network Topologies: Direct pairing into local loop lines managed by Autronica fire and security safety hubs.