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Potter CPS-24N Conventional Photoelectric Smoke Detector Owner's manual

  • I've reviewed the datasheet for the Potter CPS-24N Conventional Photoelectric Smoke Detector. This document outlines its technical specifications, operational details, and key features, such as its automatic sensitivity verification and bicolored LED indicator. I'm ready to answer your questions about this device.
  • What is the standby current of the CPS-24N?
    What is the operating temperature range?
    How does the LED indicate an alarm?
    What does it mean when the LED flashes red?
CPS-24N
Conventional Photoelectric Smoke Detector
8830138 - REV A • 08/17 PAGE 1 OF 2
Potter Electric Signal Company, LLC • St. Louis, MO • Phone: 800-325-3936 • www.pottersignal.com
Features
• 360° view of detector status LED
• Lowprole,2”high(withbase)
• 2or4wirebasecompatibility,relaybasesavailable
• Highlystableoperation,RF/Transientprotection
• Lowstandbycurrent,59μAat24VDC
• Onebuilt-inpower/sensitivitysupervision/alarmLED
• AutomaticSensitivitywindowvericationfunctionmeets
outlinedrequirementsinNFPA72,Chapter2&7,Inspection,
TestingandMaintenance.
• WithoutMagneticTestFeature
LightSource GaAIAsInfraredEmittingDiode
RatedVoltage 12or24VDC
WorkingVoltage 8-35.0VDC
MaximumVoltage 42VDC
SupervisoryCurrent 59μA@24VDC
SurgeCurrent 160μAmax.@24VDC
AlarmCurrent 150mAmax.@24VDC
AirVelocityRange 0-4000fpm
Ambient
Temperature 32°Fto120°F(0°Cto49°C)
SensitivityTest
Feature
AutomaticSensitivitywindowvericationtest
Mounting RefertoPotterSBSeriesSmokeDetectorBaseseries,bulletinno.
8840008.
Description
TheCPS-24Nisareliable,highqualityPhotoelectricSmoke
Detector.ItcanbeusedinallopenareaswherePhotoelectricSmoke
Detectorsarerequired,includingin-ductapplications.Thecomputer-
designedsmokechambermakestheCPS-24Nwellsuitedfor
detectingsmolderingresaswellasfast-amingres.
Operation
TheCPS-24Nphotoelectricsmokedetectorutilizesonebicolored
LEDforindicationofstatus.Inanormalstandbyconditionthe
LEDashGreenevery3seconds.Whenthedetectorsensesthatits
sensitivityhasdriftedoutsidetheULlistedsensitivitywindowthe
LEDwillashRedevery3seconds.Whenthedetectorsensessmoke
andgoesintoalarmthestatusLEDwilllatchonRed.
ThedetectorutilizesaninfraredLEDlightsourceandsilicon
photodiodereceivingelementinthesmokechamber.Inanormal
standbycondition,thereceivingelementreceivesnolightfrom
thepulsingLEDlightsource.Intheeventofare,smokeenters
thedetectorsmokechamberandlightisreectedfromthesmoke
particlestothereceivingelement.Thelightreceivedisconvertedinto
anelectronicsignal.
FireJudgementsignalsareprocessedandcomparedtoareference
level,andwhenveconsecutivesignalsexceedingthereferencelevel
arereceivedwithinaspeciedperiodoftime,thetimedelaycircuit
triggerstheSCRswitchtoactivatethealarmsignal.ThestatusLED
lightscontinuouslyduringthealarmperiod.
Technical Specications
firealarmresources.com
8830138 - REV A • 08/17 PAGE 2 OF 2
Potter Electric Signal Company, LLC • St. Louis, MO • Phone: 800-325-3936 • www.pottersignal.com
CPS-24N
Conventional Photoelectric Smoke Detector
The contractor shall furnish and install where indicated on the plans,
Potter Electric Signal CPS-24N photoelectric smoke detectors. The
combination detector head and twist-lock base shall be UL listed
compatiblewithaULlistedrealarmpanel.
The base shall permit direct interchange with  Potter CPS-24VN
combinationphotoelectricsmokedetector.Thebaseshallbeappropriate
twist-lockbaseSBSeries.Intheeventofpartialorcompleteretrot,
the CPS-24N may be used in conjunction with, or as a replacement
for, Potter detectors (PS-24, PS-24H and the IS-24) on most SB base
applications.
The smoke detector shall have one ashing status LED for visual
supervision.Whenthedetectorisin standby condition the LEDwill
ash Green. When the detector is outside the UL listed sensitivity
window the LED will ash Red. When the detector is actuated, the
ashingLEDwilllatchonRed.Thedetectormayberesetbyactuating
thecontrolpanelresetswitch.
The sensitivity of the detector shall be capable of being measured.
The sensitivity of the detector shall be monitored automatically and
continuously to verify that it is operating within the listed sensitivity
range. To facilitate installation, the detector shall be non-polarized.
VoltageandRFtransientsuppressiontechniquesshallbeemployedto
minimizefalsealarmpotential.AuxiliarySPDTrelaysshallbeinstalled
whereindicated.
Specications
Ordering Information
CPS-24N Sensitivity Test Feature
The Potter CPS-24N Photoelectric Smoke Detector has a built-in
automaticsensitivitytestfeature.
1.Innormalcondition,thestatusLEDashesgreen.
2.Whenthesensitivitydriftsoutsideofitssensitivitylimits,thestatus
LEDashesred.
3.Inthealarmstate,thestatusLEDisredcontinuously.
4. When the sensitivity drifts outside of its sensitivity limits and the
statusLEDashesred,thedeviceneedstobecleanedorreturnedtothe
factoryforcleaningorcalibration.
Model Description Stock No.
CPS-24N
Conventional Photoelectric Smoke
Detector without magnetic test
feature
1430037
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