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VAT Registration No. GB163 04 0349
Siretta Ltd
Basingstoke Road
Spencers Wood
Reading
Berkshire RG7 1PW
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+44(0)118 976 9000
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18
ZETA-NLP Series
LTE Cat M1/NB IoT/GSM Ultra Low Power Modem
PWRON_INisthepoweronsignal(pin4oftheRJ12powerconnector).Taking
PWRON_INhighwillturntheZETA-NLPon(assumingthereispowerapplied,butthat
theunithasbeenturnedoffusingPWROFF_INpin).
Duringpowerup,thegreenandblueLEDsarecontrolleddirectlybytheZETA-NLP
powermanagementprocess,andtheredLEDiscontrolledbytheembeddedmodem
module.WhiletheZETA-NLPisinthepoweringupprocess,theGreenLEDwill
flashrapidly(500mSon,500mSoff)andtheBlueLEDwillbeoffuntilthepowerup
processiscomplete.Afterthepoweronprocesshascompleted,theRed,Greenand
BlueLED’saredisabledcompletelytosavepowerwhilstitisinanoperatingstate.
ThegreenLEDwithbrieflyflashonceevery30secondstoindicatethatthemodemis
intheonstate.
PWRON_IN Power On Procedure LED Indicators
PWROFF_INisthepoweroffsignalonpin3oftheRJ12powerconnector.Taking
PWROFF_INhighwillturnapoweredZETA-NLPoff.
Duringpoweroff,thegreenandblueLEDsarecontrolleddirectlybytheZETA-NLP,
andtheredLEDiscontrolledbytheembeddedmodemmodule.WhiletheZETA-
NLPistransitioningthroughthepoweroffstatetheBlueLEDwillflashrapidly(500mS
on,500mSoff)andtheGreenLEDwillbeoffuntilthepoweroffprocessiscomplete
whenallLEDswillbeoff.Inthisstate,PWRON_INmaybeusedtoturntheunit
onagain.TheblueLEDwillbrieflyflashonceevery30secondstoindicatethatthe
modemisintheoffstate.
PWROFF_IN Power Off Procedure LED Indications