JLG X20JPLUS - Safety Device Electronic Control Board; Booms Position Sensors

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BoomLiftModels X20JPLUS
SAFETYDEVICE
MUX20JP021602
8.12.SAFETYDEVICEELECTRONICCONTROLBOARD
Theplatformhasanelectroniccontrolboardthatenablesthepowersupplytothe
ON‐OFFproportionalcoilsafterverificationofthesafetyconditionsbythesen‐
sorspositioned on the machine.The control procedure on the electronic board
maybebypassedusingthe keyselectorswitchwithspri
ngreturn:“safetydevice
bypasskey”.Theelectronicboardrecordseverybypassactioncarriedoutbythe
operatoronthesafetydevices,filingthembydate,timeandlapseoftimeduring
whichtheoperatorheldthe“safetydevicebypasskey”inposition.Theboardis
alsoprovidedwithaneventrecordtha
tstoresalltheoperationsperformedonthe
machineforavariableperiodoftime.
8.13.BOOMSPOSITIONSENSORS
Oneormorecylindersoftheaerialpartarmareequippedwithaninternalposi‐
tionsensorthatallowsthecircuitboardtoknowthepositionofthecylindersand
adjustthespeed.Theelectricconnectionofthesensorsisvisibleonthebottomof
thecylin
ders.Whenoneofthesensorsisbrokenoritssignalnolongerreaches
Fig.29 Electronicboardposition