Specifications

2-30 Chapter 2: 7401-4xxx Product Overview
Motion Sensor
Theterminalhardwarecandetectmovementneartheterminaland
enablessoftwaretopromptsystemoperationfromalow‐powerstate.
Applicationsoftwaremayalsobeabletomakeuseofmotiondetection
whenintheONstateifitisenabledbylower‐levelsoftware.
19889f
Motion Sensor
IRDA
Power/Status LED
USB
Camera

Motionisdetectedasachangeinambientlightlevelthatisgreater
thanasoftware‐controlledthreshold.
Aphotodiodemountedbehindthefrontbezeloftheunitsenses
ambientlightlevels.Thephotodioderesidesonasmallcircuitboard
(theMotionSensorBoard).AharnessconnectstheMotionSensor
BoardtotheamplifierandmotionsensinglogicontheProcessor
Board.TheuserPower/StatusLEDindicatorsharesthisboard.
Power/Status LED
TheLEDpowerindicatorindicatesthatpowerispresent.TheLEDis
greenwhentheprocessorandBIOSareoperatingproperly.TheLEDis
mountedbehindthefrontbezelonthesameboardasthemotion
sensor.