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9 Safety
9.5 Risk Assessment
When using the Safety Module, be sure to perform risk assessment of
the servo system in advance. Make sure that the safety level of the
standards is met. For details about the standards, refer to front of this
manual.
The following residual risks can be present even when the safety
functions operate. Therefore, safety must always be given consideration
during risk assessment.
• If external forces (such as gravitational force with a vertical axis) are applied
when the safety functions of the Safety Module are operating, the motor will
rotate due to the action of these external forces. Provide a separate
mechanical brake to secure the motor.
• If the SERVOPACK fails, the motor may operate within a range of 180
electrical degrees. Make sure that safety is ensured even in hazardous
situations.
• The number of rotations and movement distance for each type of motor are
listed below.
• Rotational Servomotor: 1/6 rotation max. (Rotation angle at motor shaft
• Direct Drive Motor: 1/20 rotation max. (Rotation angle at motor shaft
• Linear Servomotor: 30 mm max.
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conversion)
conversion)
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