Dinolift DINO 260XT, Operating Instructions Manual, Page: 74 / 101

DINO 260XT
74
LIMIT-SWITCHES
RK3: LIMIT SWITCH FOR THE BOOM SUPPORT
Prevents the operation of the outriggers and the driving device if the boom does not rest on the
support in the transport position.
Controls the relay K30.
RK4: SAFETY LIMIT SWITCH FOR THE ADJUSTED OPERATING RANGE
RK5: BACKUP LIMIT SWITCH FOR THE SAFETY LIMIT SWITCH RK4.
Trips after the preset delay (2,4 seconds) the safety relay SR3 which controls the sound signal
AM2.
RK7 AND RK15: SAFETY LIMIT SWITCH FOR THE TELESCOPE CHAIN.
As the safety limit switch operates, the electric motor stops (the holding voltage of the contactor
K1 is switched off). After that only the emergency descent system will remain operational.
RK8: SAFETY LIMIT SWITCH FOR SENSING THE FULLY RETRACTED POSITION OF THE
TELESCOPE
If the RK4 or RK5 has failed the boom cannot be lowered until the telescope movement has been
completely retracted and the tips of the limit switch RK8 have closed.
RK9: INDUCTIVE LIMIT SWITCH
Limits turning of the platform to the left.
RK10: INDUCTIVE LIMIT SWITCH
Limits turning of the platform to the right
RK11 - RK14 : LIMIT SWITCHES ON THE OUTRIGGERS
Prevents the operation of the boom unless the outriggers are not firmly supported on the ground and
all limit switches are not closed.
RK16: INDUCTIVE SENSOR
Activates the control-relay of the retardation resistors of the boom speed when the boom length is
~16m.
RK17: INDUCTIVE SENSOR
Activates the control-relay of the retardation resistors of the boom speed when the boom length is
~20m.