Description

TYCO
4B-D 4”
CONVENTIONAL DIODE BASE
517.050.045

The Tyco 4B-D is a 4-inch conventional diode base designed for use within marine fire alarm systems. It provides a secure mounting platform for compatible conventional detectors while incorporating an integrated diode that enables single-direction signal flow, supporting zone isolation and fault containment on conventional detection loops. As a foundational component of the fire detection infrastructure onboard, the diode base plays a critical role in maintaining the integrity of alarm circuits and ensuring that a fault in one section of a loop does not compromise the wider system — a key operational requirement under SOLAS fire safety regulations.

Key Features

✓ Integrated diode function allows unidirectional current flow, supporting fault isolation on conventional fire detection loops.

✓ 4-inch form factor designed for standard deck-head or bulkhead mounting positions typical in marine accommodation and machinery spaces.

✓ Compatible with conventional fire detection panels and loop configurations — specific panel compatibility subject to confirmation against system documentation.

✓ Suitable for installation across a range of onboard environments; exact environmental ratings and certifications should be confirmed against the product datasheet for the intended installation area.

✓ Designed as a field-replaceable component, supporting routine maintenance, detector swap-out, and fire alarm system servicing without full loop replacement.

Marine Applications

✓ Accommodation deck fire detection loops on passenger vessels, ferries, and cruise ships requiring zoned conventional alarm circuits.

✓ Machinery space and engine room fire alarm installations on commercial cargo vessels, tankers, and offshore support vessels.

✓ Conventional fire detection systems on workboats, platform supply vessels, and offshore units subject to flag state fire safety requirements.

✓ Replacement or upgrade of existing Tyco conventional detector bases during scheduled dry-dock maintenance or fire system surveys.

✓ Naval and coastguard auxiliary vessels requiring reliable, maintainable conventional fire detection infrastructure across multiple protected zones.

Why Marine Engineers Choose

The Tyco 4B-D diode base is a trusted component within conventional fire alarm systems, valued for its straightforward installation, reliable diode-based loop protection, and compatibility with established Tyco detection equipment found across the global commercial fleet.

Ideal For

Cargo vessels, tankers, passenger ships, ferries, offshore platforms, supply vessels, workboats, and any commercial or auxiliary vessel operating a conventional Tyco fire detection system.

Technical Support

Technical support is available for this fire alarm system component, covering onboard installation guidance, base replacement procedures, and remote troubleshooting of conventional detection loops. Contact our team for assistance with system-specific queries.