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FASA key terms

FASA · Get comfortable with the vocabulary.

Initiating device

A device receiving or detecting the relevant event and supplying an input to the alarm system, distinct from a notification output.

Notification appliance

An audible, visible or other specified output device communicating the required warning under the system design and applicable performance conditions.

Control unit

Equipment evaluating system inputs, recording conditions and operating programmed outputs under the approved configuration and its listed capabilities.

Addressable device

A device communicating an identifier within a compatible system, enabling location and status information according to the actual configuration.

Conventional zone

A grouped circuit or area indication in a non-addressable arrangement, which does not necessarily identify the individual activated device.

Alarm signal

A system indication of the defined emergency event, distinguished from trouble and supervisory conditions and their associated response procedures.

Supervisory signal

An indication of an off-normal condition in a monitored protection feature, such as the relevant valve position, rather than a fire alarm itself.

Trouble signal

An indication of a fault affecting the relevant system function or integrity, requiring investigation rather than concealment by permanent bypass.

Primary power

The normal electrical supply supporting operation under the specified system arrangement, whose loss must be handled by the designed power provisions.

Secondary power

The alternate source supporting the required operation after a primary supply problem, with capacity and performance established for the actual arrangement.

Voltage drop

The reduction in voltage along a conducting path under the stated load, which must be assessed against actual device operating limits.

Ampere-hour

A charge-capacity unit used in a specified battery model, which does not independently establish performance under every discharge or environmental condition.

End-of-line device

A specified supervision component at the intended electrical location, whose arrangement helps the compatible control equipment detect relevant pathway changes.

Signaling line circuit

A pathway carrying communications with compatible addressable equipment under the system design, distinct from assuming it powers every notification appliance.

Notification appliance circuit

A circuit serving compatible notification appliances under the actual listed arrangement, with power, supervision and load conditions requiring evaluation.

Isolator

A compatible component intended to limit the effect of a specified pathway fault, whose performance depends on its placement and system design.

Cause-and-effect matrix

A documented map connecting defined inputs and conditions to required outputs, used to coordinate programming, interfaces and verification.

Impairment

A condition in which a protection function is unavailable or reduced, requiring the authorized notification, temporary protection and restoration process.

Functional test

An evaluation of whether the intended function occurs under the specified test conditions, distinguished from appearance, a reset or an isolated command.

Record documentation

The maintained information describing the installed arrangement, configuration, test results and changes needed for responsible operation and later service.