Pilz PSEN enc m2 eCAM Operating Manual page 15

Essential safety information
The measuring system contains electrostatically sensitive
assemblies and components, which can be damaged if handled
incorrectly.
Avoid finger contact with the measuring system connection contacts and
apply the relevant ESD protective measures.
Disposal
If the device is to be disposed of after its service life, the applicable
country-specific regulations must be observed.
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