Restart Interlock; Fig. 1:Sketch Illustration Of The L4000 System - SICK L4000 Instrucciones De Operación

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Chapter 3
Fig. 1:Sketch illustration of
the L4000 system
Note
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WARNING
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Product description

3.2.1 Restart interlock

Do not confuse the restart interlock with the start interlock on the
machine. The start interlock prevents the machine starting after
switching on. The restart interlock prevents the machine starting
again after an error or an interruption in the light path.
The restart interlock can be implemented in two different ways:
• With the internal restart interlock of the L4000 system. During this
process the L4000 system controls the restart.
• With the internal restart interlock of the machine (external). During
this process the L4000 system has no control over the restart.
Always operate the application with restart interlock!
Ensure that a restart interlock is always activated. The L4000 system
is unable to verify if the external restart interlock on the machine is
operable. If you deactivate both the internal and the external restart
interlock, the operator of the machine will be at acute risk of injury.
Reset
If you want to activate the internal restart interlock on the L4000
system and an external restart interlock on the machine, then each
restart interlock has its own button.
When the reset button for the internal restart interlock is operated
• The L4000 system activates the switching outputs
• The LED on the safety evaluation device UE401 illuminates green
Only the external restart interlock prevents the machine from
restarting. After pressing the reset button for the L4000 system, the
operator must also press the restart button for the machine. If the
reset button and the restart button are not pressed in the specified
sequence, the dangerous state remains halted.
Operating Instructions
L4000 system
8010009/YTA2/2016-05-02
Subject to change without notice