EST LSS4 - Page 9

System Introduction
The Zone ActiveLED displays at arms red,and active superv isory
conditions yellow. Zonesin verification di.splay alternating red''ereen.
Circuittroubles turnon the yellow zone trouble LED. Common Control
LED's display system status.The status conditionsare NORMAL
(screen). ALARM (red), SUPERVISORY (yellou.'), and TROUBLE
(yellow).The system common control switches include RESET,
ALARM SILENCE, TROUBLE SILENCE,AND
DRILL'‘AUTOMATIC EVACUATION CANCEL.
TheL3S4 master pane1 features botha configurable alarm si anal cutotf
timerandan alarm silence/reset inhibit timer. Confi •urab1e march time,
temporaland Morse"U” codesare availableto modulatethe Notification
Appliance Circuits.The temporal rate meetsthe requirementsofthe
national emereency evacuation signal (ISO 8201- 1987& ANSI S3-at -
1990).
Full supervisionof critical system parameters is providedbythe LSS4
master panel. incl uding: brownoutand ground fault detection, fuseand
battery supervision,anda watchdog circuitto verify proper
microprocessor operation. Hardware circuit protection is pros'idedusin •p
MOVs, transorbs,and spark gaps.The enclosuresare constructedof16
eauge steel, havea key lock,and spaceforupto30AH batteries.
Initiating Device Circuit Expansion Modules: 4ZEXPand
8ZEXP
TheIDC hlodule comesin fourand eight circuit versions whichmaybe
definedfor alarmor superv isory operation. Alarm circuitsmay be
confi_•uredfor verified, non-verified,orw aterflowoperation. StyleB
circuitsmay be convertedto StyleD byusinj a 4CLA Converter
Module.Ssv itched open collector circuitsare providedfors jstem alarm,
trouble,and supervisory conditions,as wellas aIarm conditionson each
individualIn itiatin Device Circuit.To reduce power consumption,
w'here feasible, 8ZEXP, Rev.B Zone Expansion modules shouldbe used
in systems requiring12 zonesormore.
Notification Appliance Circuit Module: 4IAC
Notification Appliance Circuit Modules have four circuits whichmaybe
loadeduptoa maximumof3.5 Amps froma shared power source.The
amountof power availabletoa circuit dependsonthe power source.The
circuitsmay be wired StyleY orZ (ClassB orA).The 4IAC module
requiresone module space.
Auxiliary Relay Module: 4REXP
The 4REXP isa supplementary board with four programmableaux iliary
relays.The 4REXPmaybe installedon the LSS4 master panel,andon
each 4ZEXPor 8ZEXP zone expansion card.The 4REXP installedon
the LSS4 master panelmay havetwo relays re-configured:oneasthe
common system trouble relay,anda secondasthe common system
LSS4 Installation, Operation,and Maintenance Manual
1.3