ABB ACS800 Hardware Manual page 78

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8. Remove Fiber Optic cable from internal connection of drive. When removing the
fiber optic cables, pull on the connector, not the cable. Carefully route through the
grommets and be very careful not to kink or touch the ends of the fiber optic cables.
Any contaminants on the fiber optic cables will reduce signal integrity and may result
in failure.
Recommendation
Never touch the ends of a fiber optic cable.
9. Review the above and ensure all the above listed steps are complete and all power
and control connections are disconnected.
Maintenance