
4Outdoor Self-Powered Siren
General features
Self-powered microprocessor controlled horn withstrobe/flash for outdoor applications.
New design.
Strong weatherproof plastic material moulding.
Tropicalized-steel innerplate.
4 audible and visual signal inputs.
Modulated frequency sound emission with sound options.
High output magnetodynamic exponential horn withtest circuit.
Protected against tamper, wall tamper, flash bulb damage and wire cutting.
Foam tamper device (NEKA-F and NEKA-FS only).
Programmable maximum alarm time.
Battery test circuit with flash shutdown under low battery or battery trouble conditions (NEKA and NEKA-F only).
Drilling pattern for easy installation.
Houses 12 V, 2 Ah, buffer battery.
Box
The hard wearing plastic moulding is resistant to the most adverse weather conditions. The louver grille has been especially de-
signedtoprotecttheinternalcomponentsagainstrainwhileepitomisingsoundemission.Thetropicalized-steelinnerplateprovides
extra protection against acts of delinquency.
Tamper protection
The tamper device (must be anchored to the wall) triggers alarms when either the frontplate or innerplate is removed, or when the
siren is pulled from the wall (wall tamper). The foam tamper protection (NEKA-F and NEKA-FS only) comprises an active in-
frared barrier with a dual detector that provides high immunity to false alarms (caused by insects).
The siren canoperate in normal orautomatic mode. In normalmode, the siren opensthe AS andASG terminalswhen tampered.
Theseterminals havetobeconnectedtocontrolpanel tamperlinethat activatesthesiren (andothertypesof signalling,depending
on requirements) through +N, AF, Aor Fterminals.
Inautomatic mode,thesirenindependentlyactivatestheacousticandopticalsignallingfortamperevents:AS and ASG terminals
donotneedtobeconnectedtotamperlinebutthecontrolpaneldonotknowthesirentamperstatus.Inautomaticmode,thetamper
alarm ends when 40 seconds after all causes have been removed, or when maximum alarm time elapses.
Activation
The siren can be activated by the tamper device, andby +N, AF, Aand F terminals. For example: the siren activates when the
voltage fails on terminal +N. This operating mode allows the siren to detect wire cutting, as this terminal also supplies the power
and battery charge. The polarity programmable AF, Aand Fterminals can be used for connection to other devices.
The siren blocks for 4 minutes if receive most then 6 activating requests in 4 minutes. This is to protect against control panel
malfunctioning.
Signalling
Theaudibleandvisualsignalsontheloudspeakerandstrobe/flashdependonthetypeofalarm,andthealarmsignalconfiguration.
The sound modulation extremes generate a fastidious shrill tone — intended to discourage intruders,and a low tone — to ensure
goodaudibility.ItispossibletoselecttwoaudiblesignalspatternsforalarmInputs—withtheexceptionoftheinternaltamperevent
which has only one audible signal (up-scale modulated frequency between 800 and 2000 Hz). The audible signals and modulated
frequencyrange canbe foundin “Settingthe operatingmode” onpage 7. Thereare twofrequency ranges:800/2000 Hzand 1100/
2400 Hz. The audible signalling will stop as soon as the maximum alarm time expires, whereas, the visual signalling will continue
until the alarm conditions clear (memory flashing).