Symbol 6244 from IEC 60417 - Title/Meaning: Conformity Function/description: To indicate the conformity with safety and security limits for a given modality or set of modalities.[]Where possible, this symbol should be displayed in [green].
Additional information: 
For the users, the centre dot only be highlighted; for the sensors the inner circle only be highlighted such as in bold; for the actuators the outer circle only be highlighted.
The symbol shown is for the actuators.
For further technical details, see ITU-T X.1082 and IEC 80000-14.
Own work using: iso.org/obp/graphics/grs/adb65680-40a7-4905-bd2f-7a20ae4de62a 200.png
Vectorization:  Mrmw