Siemens S120 configurationmanual Occurrence of magnetic fields, Components with permanent magnets

General safety guidelines 1.4 Danger from strong magnetic fields

1.4Danger from strong magnetic fields

Occurrence of magnetic fields

Strong magnetic fields occur in the components of the motor that contain permanent magnets. The magnetic field strength of the motors results exclusively from the magnetic fields of the components with permanent magnets in the de-energized state. Electromagnetic fields also occur during operation.

Components with permanent magnets

CAUTION

The permanent magnets of the 1FW6 torque motors are located in the rotor.

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Figure 1-1 Schematic representation of the static magnetic field of a rotor, as a function of distance

1FW6 Built-in torque motors	17
Configuration Manual, 05/2009, 6SN1197-0AE00-0BP3