Operating Instructions Chapter 1
C4000 Micro/Basic/Basic Plus/Eco
8009423/YT79/2016-03-14 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 7
Subject to change without notice
About this document
The term “dangerous state”
The dangerous state (standard term) of the machine is always shown in the drawings and
diagrams of this document as the movement of a machine part. In practical operation,
there may be a number of different dangerous states:
• machine movements
• electrical conductors
• visible or invisible radiation
• a combination of several risks and hazards
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