Sierra Wireless Raven XT Guía de usuario Pagina 62

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Rev 3.0D Jul.09 49
7
7: Inputs, Relay Outputs, and
Power Status
Sub-section
Sub-section
TheRavenXThasspecialfeaturesforuseinandM2M
environment.TheRavenXTcanbeconfiguredtomonitorthe
inputsandrespondtospecifictypesofevents.Thesefeatures
canbeconfiguredtoyourneeds.
Capturing External Events using
Inputs
Aspartofitspowerconnector,theRavenXTisequippedwith
anI/Ointerfaceforuseininstrumentationapplications.This
includes1digitalinputand1digitaloutputwhichcanbe
connected,viaaspecialI/Oadaptercable,tosensorsand
switchestomonitorstatusandremotelycontrolequipment.
Figure 7-1: Raven XT
Digital Input
Bymeasuringcontactclosuresonswitches,thedigitalinput(s)
canreportasimpleopenorclosedstate.Digitalinput(s)canbe
wiredtothetwogroundsignalsviaaswitch.Whentheswitch
isopen,theinputwillread“OPEN”.Whentheswitchisclosed
andtheinputisconnectedto
ground,theinputwillread
“CLOSED”.
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