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.