Installation Guide
Ordering        Dimensions    Case/  Layers/  Skid 
Number  UPC  I2F5  Pack Quantity  (w x d x h inches)  Weight  Skid  Skid  Weight 
N/A 0-47871-09475-2 N/A individual* 5.75x1.5x5.75 0.5lbs N/A N/A N/A
21006378 0-47871-09475-2 100-47871-40381-0 MasterPack(6units) 6.5x13.25x6 3lbs 147 7 441lbs
Architectural and Engineering
Specifications
The smoke alarm shall be Sentinel model i12040A or approved equal. It shall 
bepoweredbya120VAC,60Hzsourcealongwitha9Vbatterybackup.
Theunitshallincorporateanionizationsensorwithnominalsensitivityof.50
to1.28%ft.Thetemperatureoperationrangeshallbebetween40˚Fand
100˚F(4˚Cand38˚C)andthehumidityoperatingrangeshallbe5%-95%
relative humidity.
  The smoke alarm can be installed on any standard single gang electri-
calbox,uptoa4”octagonjunctionbox.Theelectricalconnection(tothe
alarm)shallbemadewithaplug-inconnector.Amaximumof24Sentinel
devices can be interconnected in a multiple station arrangement. The inter-
connectsystemmustnotexceedtheNFPA(NationalFireProtection
Association)limitof18initiationdevices,ofwhich12canbesmoke
alarms.With18initiatingdevices(smoke,heat,CO,etc.),interconnected,it
is still possible to interconnect 6 strobe lights and or relay modules. The unit 
shall provide optional tamper resistance that deters removal of the unit from 
the wall or ceiling. 
  The alarm shall include a test button that will electronically simulate the 
presence of smoke and cause the unit to go into alarm. This sequence tests 
the unit’s electronics, battery and horn to ensure proper operation.
 Theunitshallincludeapiezoelectrichornthatisratedat85decibelsat
10feet.TheunitshallincludeHush
TM
 feature that silences the unit for 
approximately7minutesifanuisanceconditionoccurs.Theunitshallalso
include a low battery warning utilizing a brief alarm chirp every 40 seconds 
for a minimum of seven (7) days.
 TheunitshallincorporateredandgreenLEDindicators.ThegreenLED
(whenilluminated)indicatesthepresenceofACpower.TheredLED(locat-
edundertheTEST/Hushbutton)hasfour modes of operation:
Standby Condition:TheredLEDwillflashevery40secondstoindicatethat
the smoke alarm is operating properly. Alarm Condition: When the alarm 
sensesproductsofcombustionandgoesintoalarmtheredLEDwillflash
oneflashpersecond.TheflashingLEDandpulsatingalarmwillcontinue
untiltheairiscleared.Whenunitsareinterconnected,onlytheredLEDof
the alarm that senses the smoke or is being tested (the originating unit) 
will flash. All other units in the interconnected system will sound an alarm 
buttheirredLED’swillNOTflash. Alarm Memory: This smoke alarm is 
equipped with an alarm memory, which provides a visual indication when an 
alarmhasbeenactivated.TheredLEDwillilluminateforabout1.5seconds
every 20 seconds to indicate the memory condition. Hush
TM
 Mode: The red 
LEDwillilluminatefor1.5secondsevery10seconds,indicatingthesmoke
alarmisintheHush
TM
Mode.
 TheunitshallataminimummeettherequirementsofUL217,NFPA72,
TheStateofCaliforniaFireMarshall,NFPA101(Oneandtwofamilydwell-
ings)FederalHousingAuthority(FHA),HousingandUrbanDevelopment
(HUD).Itshallalsoincludea10-yearmanufacture’slimitedwarranty.
120V AC/DC Wire-in Smoke Alarm
Battery Backup
Part Number 21009475
Installation of Smoke Alarm
The smoke alarm must be installed to comply with all local codes  
havingjurisdictioninyourarea.Allwiringshallbeinaccordancewith
articles210and300.3(B)oftheUSNationalElectricalCode,ANSI/
NFPA70andNFPA72.Themultiplestationinterconnectwiringmust
be in the same raceway as the AC power wiring. In addition the resis-
tanceiftheinterconnectwiringshallbeamaximumof10ohms.Make
certain all alarms are wired to a single, continuous (non-switched) 
power line, which is not protected by a ground fault interrupter. A 
maximumof1000ft.ofwirecanbeusedintheinterconnectsystem.
Use standard UL listed household wire as required by code.
FUSE OR CIRCUIT BREAKER
BLACK
WHITE
RED
L
N
First 
Alarm
Additional 
Alarms
Ordering Information
Technical Specifications
ModelNumber: i12040A
PowerSource: 120VAC (
80mA)with9VBatteryBackUp
Sensor: Ionization
AudioAlarm: 85dBat10ft
TemperatureRange: 40˚F(4.4˚C)to100˚F(37.8˚C)
HumidityRange: 5%-95%relativehumidity(RH)
Size: 5.6”indiameterx1.55”depth
Weight: .5lb
Interconnects: Upto24Sentineldevices
Wiring: Quick-connectplugwith8”pigtails
LED: Red,4modesofoperation
  Green, indicates AC power
Warranty: 10yearlimited
*Not for sale by individual unit  **Includes Wiring Adapters
Distributed by:
P/N: 21009475 sheet  rev. 05-12


