Safety Symbols - Siemens SINUMERIK ONE NCU 1740 Equipment Manual

Safety symbols

Protective conductor connec‐
General warning symbol
NCU 1740
Equipment Manual, 09/2022, A5E51087503B AC
Icon
The equipment is only suitable for direct current. Used for marking cor‐
responding terminals.
Direct current
For marking the connection for an external protective conductor for pro‐
tecting against electrical shock in the event of an error or for a connect‐
ing terminal of the external protective conductor.
tion
To identify the functional grounding.
Ground
The documentation must be consulted in any scenario where the symbol
is affixed in order to find out the type of potential hazard and the actions
required to avoid the risk.
Explanation
14
147