AirLink Communications Raven X HSDPA Guia do Utilizador Página 57

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Rev 2.0 Jul.09 50
7
7: Inputs, Relay Outputs, and
Power Status
Sub-section
Sub-section
TheRavenXEhasspecialfeaturesforuseinandM2M
environment.TheRavenXEcanbeconfiguredtomonitorthe
inputsandrespondtospecifictypesofevents.Thesefeatures
canbeconfiguredtoyourneeds.
Capturing External Events using
Inputs
Aspartofitspowerconnector,theRavenXEisequippedwith
anI/Ointerfaceforuseininstrumentationapplications.This
includes1digitalinputand1digitaloutputwhichcanbe
connected,viaaspecialI/Oadaptercable,tosensorsand
switchestomonitorstatusandremotelycontrolequipment.
Figure 7-1: Raven XE
Digital Input
Bymeasuringcontactclosuresonswitches,thedigitalinputs
canreportasimpleopenorclosedstate.Eachofthefour
digitalinputscanbewiredtothetwogroundsignalsviaa
switch.Whentheswitchisopen,theinputwillread“OPEN”.
Whentheswitchisclosedandthe
inputisconnectedto
ground,theinputwillread“CLOSED”.
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