Liebherr LTM 1250-6.1 User Manual
Page 5
• The electric and electronic components are interconnected
by the latest data bus transmission technique
• Instead of the traditional electric wiring, the data transmission
to the individual function blocks is performed digitally just
by a few data cables, thus improved reliability due to
essentially less contacts
• Self-manufactured Liebherr bus systems (LSB), specially
adapted to the requirements of a mobile crane
• Diesel engine and automatic transmission are controlled by
a CAN data bus. The all electronic drive management reduces
fuel consumption and improves the exhaust gas emission
• The electric systems of the carrier and crane as well as of
all cockpit functions, the outrigger system and sensor system
of the boom are interconnected by 4 Liebherr system busses
• The control of the function blocks is realized by I/A modules
the programming of which is performed by means of the
Liebherr system busses. The control intelligence is integrated
into the LICCON central unit
• Comprehensive diagnostic facilities, quick error localization,
operating error display
• Test programs for functional test of keyboard and display
unit as well as for the test of the control units for engine and
transmission management, additional Liebherr brake system,
hydraulic ventilator, hydraulic suspension and outrigger
control panels
• The new data bus technique distinctively increases
functionality and efficiency of the mobile crane
Legend:
LSB - Liebherr system bus 1
LSB - Liebherr system bus 2
LSB - Liebherr system bus 3
LSB - Liebherr system bus 4
CAN - Bus
SCI - serial communication interface
1 Input/output module for control of the suspension, Liebherr
Diesel engine, automatic transmission, control functions,
pneumatic control of brake functions
1a Instruments keyboard unit in driver’s cab
2 Input/output module for differential locks, display functions
2a Instruments keyboard unit in driver’s cab
3 Input/output module for outrigger system - right
3a Control unit for outrigger system - right
4 Input/output module for outrigger system - left
4a Control unit for outriggers system - left
5 Input/output module for engine brake, cruise controller, speed
setter, control of Diesel engine (steering column switch right)
and automatic transmission
6 Control of automatic transmission
7 Control of injection pump – Liebherr Diesel engine/carrier
8 Slewing sensor in slipring unit
9 Connection of Liebherr system bus (LSB 1, 2, 3, 4)
10 LICCON central unit
11 LICCON monitor in crane cab
12 Length sensor and cable drum/energy cable for interlocking
gripper/telescopic boom
13 Inductive sensors (12 x)
14 Angle sensor on base section
15 Cable drum for items 16, 17, 18 and for luffing jib
16 Wind sensor
17 Hoist limit switch
18 Angle sensor
19 Input/output module for electronic control of Diesel
engine/superstructure, air flap, ventilator clutch, exhaust
flap
20 Control injection pump – Liebherr Diesel
engine/superstructure
21 Control lever
22 Pressure sensor (4 x) for output management and LMB
(safe load indicator)
LSB 3
LSB 4
LSB 1
CAN-Bus
LSB 2
CAN-Bus
9
20
4
4a
3a
3
8
1
2
2a
1a
21
21
16
22
LSB 1
17
15
7
6
12
14
19
5
11
10
18
13
7
6
LTM 1250-6.1
LTM 1250-6.1