Siemens SIMOTICS S-1FK2 Operating Instructions Manual page 23

6. Influence of network-connected and wireless communications systems, e.g. ripple-control
transmitters or data communication via the network or mobile radio, WLAN or Bluetooth.
7. Motors for use in potentially explosive areas:
When moving components such as bearings become worn, this can cause enclosure
components to exhibit unexpectedly high temperatures during operation, creating a hazard
in areas with a potentially explosive atmosphere.
For more information about the residual risks of the drive system components, see the
relevant sections in the technical user documentation.
Planetary gearboxes for servomotors
Operating Instructions, 09/2023, A5E50494253B AC
Fundamental safety instructions
2.4 Residual risks of power drive systems
21