C

Closed Protocol

A protocol is said to be closed if its mode of operation and timings are not published. Closed protocols mean that all components of a fire detection system must be sourced from the same manufacturer. See also 'open protocol'.

To find out more, download our Protocols PIN sheet PDF by clicking here.

Carbon Monoxide (CO) Fire Detector

A device incorporating an electrochemical cell which senses carbon monoxide (CO) but not smoke or any other combustion products. It works by sensing the level of CO in the air.

To find out more, visit the CO Detectors page.

Conductor

A general tern used to describe 'cable' within the fire protection industry.

Continuity Link

The Continuity Link is a feature of the Orbis TimeSaver® Base which enables voltage testing of zone wiring prior to commissioning.

To find out more, visit the Orbis page.

Control & Indicating Equipment (CIE)

Apparatus used to control a fire protection system. Often called a 'control panel'.

Conventional

The term 'conventional detector' is used to describe a two-state fire detector ie normal state and alarm state. In conventional systems, devices are wired into a circuit or 'zone' of up to 20 detectors. An alarm is indicated by zone on the fire alarm panel. Generally used on non-addressable systems.