Siemens FS-250 Spécifications télécharger pdf (Page 66)

FS-250 Installation and Operation Manual

APPENDIX-E: GLOSSARY

Alarm Signal. A signal indicating an emergency requiring immediate action, such as an

alarm for fire from a manual station, a waterflow alarm, or an automatic smoke detector.

Alarm Silence Inhibit. An option that prevents a human operator from silencing the

notification appliances for a preset period of time.

Alarm System. A combination of compatible initiating devices, control panels, and

notification appliances designed and installed to produce an alarm signal in the event of a

fire.

Alarm Verification. A preset option that causes the control panel to verify alarms

originated by smoke detectors before indicating an alarm.

Annunciator. A remotely located, electrically powered display, separate from the control

panel, containing LEDs or lamps to indicate the states of the fire alarm system.

Audible Signal. An audible signal is a sound made by one or more audible notification

appliances, such as bells or horns, in response to the operation of an initiating device.

Authority Having Jurisdiction (AHJ). The organization, office, or individual responsible

for approving equipment, installation or procedure.

Auto-Silence. The capability of a control to automatically silence the notification appliances

after a preset period of time.

Auxiliary Relays. Control relays that energize only during alarm conditions that are used to

either apply power to or remove power from other equipment during an alarm condition.

Class A Circuit. An initiating device or notification appliance circuit within which all

components remain fully functional, even though a single open or ground exists in the circuit.

Class B Circuit. An initiating device or notification appliance circuit within which some or

all components may be disabled with a single open or ground exists in the circuit.

Detector - Smoke, Ionization Type. A detector employing the principle of smoke's effect

on an electrical current flowing in an ionized air chamber.

Detector - Smoke, Photoelectric Type. A detector employing the photoelectric principle of

reflection or obstruction of light by smoke.

End Of Line (EOL). A device used to terminate a supervised circuit.

General Alarm. A term usually applied to the simultaneous operation of all the notification

appliances on a system.

Ground Fault. A trouble condition in which a low resistance has been detected between

the system wiring and conduit ground.

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Siemens FS-250 Spécifications Page 66