91
160XT 180XT 210XT
are switched over to the joystick movements in the X-direction. When the relay
is not active, the joystick movements in the X-direction control turning of the
boom to the left and right.
K391:
CHANGE-OVER RELAY FOR OPTIONAL FUNCTIONS
When the relay is active the in-out movements of the telescope are switched
over to the joystick movements in the Y-direction. As the relay is not active
lifting-lowering movements of the boom are switched over to the joystick
movements in the Y-direction
K40:
CONTROL OF THE COMBUSTION ENGINE CHOKE
Switches on the combustion engine choke.
Fuse F2 10A.
K41:
SENSOR RELAY FOR THE AC SUPPLY
When the lift is connected to an AC supply, the relay switches off the start
circuit and switches on the stop circuit of the combustion engine. The relay
spool is controlled by the AC-voltage.
K42:
START RELAY FOR THE COMBUSTION ENGINE
Fuse F2 10A.
K60:
SWITCH-OFF-RELAY FOR THE FUNCTIONS CONTROLLED FROM THE
CHASSIS CONTROL CENTRE
Switches off the voltage supply to all the other boom movements during
levelling of the platform.
SR2:
Safety relay monitoring the operation of the outriggers
The safety relay resets as soon as all the outrigger safety limit switches (RK11,
RK12, RK13 and RK14) have closed. After that it is possible to operate the
boom.
SR3:
SAFETY RELAY FOR MONITORING THE OVERLOADING OF THE BOOM
Safety limit-switch RK5 controls the operation of the safety relay.
Overloading of the
boom:
SR3 is disconnected. The safety relay is automatically
reset upon return to the normal outreach range. The
delay adjusted with the capacitors affects the tripping
moment of the SR3.
If the RK5 fails: SR3 is disconnected. The safety relay is not
automatically reset but the due operation of the electric
equipment must be checked. The delay adjusted with
the capacitors affects the tripping moment of the SR3.
SR4:
SAFETY RELAY FOR THE EMERGENCY STOP CIRCUIT
SR4 switches off control voltage from the engine control contactors.
The safety relay operates provided that the emergency stop buttons on the
upper and lower control centres are in their upper positions and the chain limit
switch RK7 is not active. In addition the contactors K1 and K2 must be inactive.
Courtesy of Crane.Market
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