TheEKHOwirelessfiresystemcanbecomposedofa
combinationofthefollowingwirelessdevices:
EK‐WL8‐TRHWirelesstranslator:thisdeviceisthe
core of the wireless system; it communicates
continuouslywithwirelessdevices,suchassensors,
callpoints,sounders,etc.Thetranslatorconnectsto
awiredcontrolpanelviaasignalingloop.
Thewholesystemiscontrolledbythecontrolpanel
similartoanyotherfirealarmsystem.Thetranslator
isthegatewaybetweenthecontrolpanelandthe
radiodevices.
EK‐WL8‐EXP Wireless expanders: The translator
communicates with other wireless devices only if
they are in its communication range. Wireless
expandersareusedwhennetworkcoverageneeds
to be expanded and/or the environment poses
difficulties to radio communication. These devices
actasrepeatingdevicesforcommunicationbetween
wirelessdevicesandthetranslator.
Sensors (EK‐WL8‐O, EK‐WL8‐H, EK‐WL8‐OH, EK‐
WL8‐OV)aredesignedtodetectsmokeand/orheat
intheenvironment.Ifheatand/orsmokeispresent
and exceeds a defined limit, the wireless system
triggersanalarmcondition.
EK‐WL8‐SND Sounders play an audible warning
whenthewirelessfirealarmsystemisactivated.
EK‐WL8‐CPCallpointsprovideamanualmethodfor
initiatingafirealarmcondition.
EK‐WL8‐IN Input modulesreceiveasignalfrom
wired conventional (non‐addressable) sensors and
devicesandtransmitthemtothetranslator
EK‐WL8‐OUT Output modules receive control
commands from the translator to open/close the
connectedcircuit.Designedtocontroltheoperation
/ state of external devices or plant such as air
conditioning/doorrelease/emergencyshutdown.
Thefirealarmpanelcontrolsthealarmsandevents
of the entire system. The EK‐WL8‐TRH wireless
translatorisconnecteddirectlytothefirealarm
panelviatheHochikiESPEnhancedSystemProtocol
andcommunicateswiththewirelessdevicesandthe
wirelessexpanders.
Thefirealarmpanelreceivesallwireless
communicationsthroughthewirelesstranslatorand
transmits back the alarms and events through the
wirelesstranslatortothewirelessdevices.
The wireless system is based on a mesh network,
whichoperatesbasedonthefollowingrules:
eachdeviceautomaticallychoosesitsparent
expander;
expandersautomaticallyformanetworkfor
delivering information to the main control
panel.
Wirelessdevicesdonotneedtobeassignedtoa
specificexpandernordotheexpandersneedtobe
specifiedhowtocommunicatewitheachother.The
wireless devices are simply initialized to the
translatorandthenprogrammedtothefirecontrol
panel.
WirelessDevices:aGeneralDescription
SystemStructure
www.acornfiresecurity.com
www.acornfiresecurity.com
