Instructions

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8. LEDs
MostLEDs,suchasIN1toIN5,OUT1toOUT3andRX/TXlightupautomaticallyaccordingtothecurrentstatusof
in-/output.
TheGSM-LEDisautomaticallycontrolledbytheGSMmoduleandhasthefollowingconditions:
• off:GSMisswitchedoff
• lit:searchforGSMnetwork,notconnected
• ashesevery3seconds:GSMnetworkfoundandsuccessfullyloggedin
• asheseverysecond:Acallismade(in-andoutgoing),e.g.intheINCALLfunction
Theerror-LEDhasseveralsignallingtasks:
• off:regularcondition
• continuallylit:„BLOCKMODE“:Therelayscannotswitch
• continuallyashing:AnerrorintheGSMcommunicationwasfound(SIMPIN?)
• ashes1x:SMSwasreceived/sent
• other signals are described in the chapters „Reset“ and „Factory Reset“
9. Mini-USB port
Thisisonlyaccessibleafterremovalofthefrontplate.ThisinterfacecanbeusedtoconguretheproductwithaPC
softwareandinstallnewrmwareupdates.Observethefollowinggeneralnotes.Fortherstsettingofparameters,
theproductcanalsobeoperatedwithoutexternalpowersupply,viaUSBonly.However,noINxorOUTxinterfaces
are available via USB.
10. RS485-Interface
ThisinterfacecanbeusedtoconnecttheGX155tooperationalaccessoriesandassessitthroughthis.Thereisalso
the option of controlling the GX155 via this interface. Optional accessories are offered via the product website at www.
conrad.com.