Curtis Instruments 1234 - Throttle Type 1; Throttle Type 2

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#URTIS-ANUAL/3 
&OR POTENTIOMETERS THE CONTROLLER PROVIDES COMPLETE THROTTLE FAULT
PROTECTIONTHATMEETSALLAPPLICABLE%%#REGULATIONS&ORVOLTAGETHROTTLESTHE
CONTROLLERPROTECTSAGAINSTOUTOFRANGEWIPERVALUESBUTDOESNOTDETECTWIRING
FAULTSITISTHEREFORETHERESPONSIBILITYOFTHE/%-TOPROVIDEFULLTHROTTLEFAULT
PROTECTIONINVEHICLESUSINGVOLTAGETHROTTLES
4HROTTLETYPESnUSETHEFORWARDANDREVERSEINPUTSSWITCHESANDIN
A
DD
ITIONTOTHETHROTTLEPOTINPUTTODElNETHETHROTTLECOMMANDSEE&IGURE
PAGE4HROTTLETYPESANDDONOTUSETHEFORWARDANDREVERSEINPUTS
7IRINGFORTHEMOSTCOMMONTHROTTLESISDESCRIBEDINTHEFOLLOWINGTEXT
ANDSHOWNINTHEACCOMPANYINGILLUSTRATIONS)FATHROTTLEYOUAREPLANNINGTO
USEISNOTCOVEREDCONTACTTHE#URTISOFlCENEARESTYOU
4HROTTLE4YPE
&ORTHESEWIRERESISTIVEPOTENTIOMETERSSHOWNIN&IGUREFULLTHROTTLEREQUEST
CORRESPONDSTOΩMEASUREDBETWEENTHEPOTWIPERPINANDTHE0OT,OWPIN
).34!,,!4)/.7)2).' 4HROTTLE7IRING
&IG 7IRINGFOR4YPE
THROTTLES
"ROKENWIREPROTECTIONISPROVIDEDBYTHECONTROLLERSENSINGTHECURRENTmOW
FROMTHEPOTWIPERINPUTPINORTHROUGHTHEPOTENTIOMETERANDINTO
0OT,OWPIN)FTHE0OT,OWINPUTCURRENTFALLSBELOWM!ATHROTTLE
FAULTISGENERATEDANDTHETHROTTLEREQUESTISZEROED.OTE0OT,OWPIN
MUSTNOTBETIEDTOGROUND"
4HROTTLE4YPE
7ITHTHESETHROTTLESTHECONTROLLERLOOKSFORAVOLTAGESIGNALATTHEWIPERINPUT
:
ER
OTHROTTLEREQUESTCORRESPONDSTO6ANDFULLTHROTTLEREQUESTTO6!VARIETY
OFDEVICESCANBEUSEDWITHTHISTHROTTLEINPUTTYPEINCLUDINGVOLTAGESOURCES
CURRENTSOURCESWIREPOTSANDELECTRONICTHROTTLES4HEWIRINGFOREACHIS
SLIGHTLYDIFFERENTASSHOWNIN&IGUREANDTHEYHAVEVARYINGLEVELSOFTHROTTLE
FAULTPROTECTION
7HENAVOLTAGESOURCEISUSEDASATHROTTLEITISTHERESPONSIBILITYOFTHE
/%-TOPROVIDEAPPROPRIATETHROTTLEFAULTDETECTION&ORGROUNDREFERENCED
n6
THROTTLES
THECONTROLLERWILLDETECTOPENBREAKSINTHEWIPERINPUTBUT
CANNOTPROVIDEFULLTHROTTLEFAULTPROTECTION
4OUSEACURRENTSOURCEASATHROTTLEARESISTORMUSTBEADDEDTOTHECIRCUIT
TOCONVERTTHECURRENTSOURCEVALUETOAVOLTAGETHERESISTORSHOULDBESIZEDTO
PROVIDEAn6SIGNALVARIATIONOVERTHEFULLCURRENTRANGE)TISTHERESPONSIBIL
ITY
OFTHE
/%-TOPROVIDEAPPROPRIATETHROTTLEFAULTDETECTION