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Liebherr Liccon System

Microtec MkII Light Control Module Input Connection

Deriving input signals to the Microtec MkII Light Control Module from the
Liebherr Liccon System

Before you begin.

Read through and thoroughly understand the instructions before starting. The Microtec MkII Light
Control Module overview available on our website provides more detailed information that may
assist you when connecting and configuring your module. Specific instructions for connecting
your warning light to the module outputs are also available on the Microtec web site to make the
task quick and easy.
If your module is a latching (Thiess specification) unit it should be connected exactly the same as
a standard unit. Ensure easy access to the front panel during crane use and beware of the time
delays and latching function when performing final tests.

Disclaimer
Microtec products are warranted against defects in materials and workmanship for a period of 12
months from the date of purchase. Microtec will at its discretion repair or replace defective goods
within the warranty period. The warranty excludes failures caused by incorrect connection or poor
workmanship on the part of the installer. The users exclusive remedy and the suppliers sole
liability is limited to refund of the purchase price or replacement of any product shown to be
otherwise than as warranted. The supplier will not be liable for incidental or consequential
damages of any kind.

These Instructions.
The following instructions detail the input connections only to the Microtec MkII light control
module for a specific crane / computer type. For details of input connections for a different crane /
computer see the specific instructions for that machine or use the “overview” for customised
installations.
Reasonable care is exercised in the preparation of these instructions, but variations in machine
build may impact the accuracy from time to time and are beyond our control. These instructions
should be used by suitably competent personnel for guidance only.
These instructions should be read in conjunction with the Microtec MkII Light Control Module
overview for detailed description of connections, specifications, and configuration.
For details of output connections to Microtec and many other types of external warning light, visit
our website at www.microteceng.com.au

Preliminary.
Set up the crane and check that the crane systems are fully functional and overload cut out
devices function as prescribed by the manufacturer. Check the satisfactory operation of override
switches and indicators.

External Warning Light / Output Connections.

Begin by installing a suitable warning light and buzzer to the crane exterior. Microtec
manufactures several versions designed for reliability & ease of use with the light control module,
see our website for details. Run the connecting cable inside to the Light Control Module. There
are many external warning lights available and the Light Control Module is fully compatible in the
vast majority of cases. Simple connection details for the most commonly used light fittings are
available at www.microteceng.com.au

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Input Connections.
The Light Control Module requires electrical inputs from the machine to activate the outputs.
Some signals that may be required are:

•90% load or Pre Warning

•100% load or Motion Cut
•All potentially unsafe overrides
•Anti two block / overhoist alarm

Possible connection points from which these signals may be derived are detailed in table 1. Begin
by verifying the change in voltage for the given function at the prescribed connection points with a
volt meter. When sure of the connections isolate or disconnect the batteries before commencing
electrical work.

Table 1 Signal Connections

Light Function Connection Point, Position, Description.

Module
Input
connection
Fig 2.
1 90% Remove the cover on the electrical cabinet behind the upper drivers cab to allow
access to the crane electrics. Locate the ZE0 computer module. Remove connector
X70 from the module and open the connector. Connect a wire from Pin 20 of connector
X70 to the Light Control Module input terminal 1.
(Terminal pins are available from Microtec).
2 100% Also in connector X70. Connect a wire from Pin 16 of X70 to the Light Control Module
input terminal 2.
Alternatively this connection may be made at connector X46 Pin 99.1 (alarm bell feed).
3 Not Used Not Connected
4 Not Used Not Connected
5 Not Used Not Connected
6 Not Used Not Connected
24V Supply 12 Remove the fuse covers and test for a suitable power source. Look for a fuse that
or 24V becomes active when the upper key switch is turned on. Connect a wire from the fused
side of the fuse to the Light Control Module supply 24V terminal.
GND Supply Connect a wire from a suitable and reliable GND point on the crane to the Light Control
GND Module supply GND terminal.

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Input sensitivity.

The input sensitivity of the light control module inputs should be set to the values in Table 3. For
more information on configuration see Microtec MkII Light Control Module overview.

Table 3.

ON ■
OFF ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6
Settings Mode

Input Polarity

On completion of the wiring the normal input polarity of the Light Control Module must be set as
follows:

Table 4 Fig.1

ON
OFF ■ ■ ■ ■ ■ ■ ■ ■
1 2 3 4 5 6
Settings Mode

Pull Up Resistors

The Pull Up resistors should be set on the Light Control Module as follows:

Table 5 Fig. 2

ON
OFF ■ ■ ■ ■ ■ ■
1 2 3 4 5 6
Pull Ups

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Functional tests.

On completion of the electrical work functional tests should be conducted to verify the
performance of the system. Set up the crane in a normal working state and ensure that no
overrides are active. Providing that the values prescribed in Table 2 were correct and the Input
Polarity DIP switches agree with Table 4 the warning light should be Green.

If the warning light does not settle at green check the troubleshooting section below.

•Impose or simulate a 90% load on the crane, the warning light should show Amber.

•Impose or simulate a 100% load on the crane that causes a motion cut, the warning light should
show Red and sound the buzzer. Return the crane to a safe (Green) working range.

•Carefully overwind each winch to impose a 2 blocked state on the crane. In each case the
warning light should show Red and sound the buzzer. Return the crane to a safe (Green) working
range.

If all of the above states test OK the cables may be tidied and the covers replaced.

Troubleshooting

Check the input voltages with the crane in a safe, normal working state. If any voltages differ from
those in table 2, check that all overrides are off and double check your connections. If incorrect
operation continues check that your input configurations agree with the appropriate sections
above.

Table 2.
Light Control Module Reading with volt meter
Input connection No. with respect to GND,
Fig 2. Crane in safe state.
1 0V
2 0V
3 X
4 X
5 X
6 X

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