IDEC HR6S-DN Instruction Manual page 11

LOSS OF CONTROL
The designer of any control scheme must consider the potential failure modes of control paths
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and, for certain critical control functions, provide a means to achieve a safe state during and
after a path failure. Examples of critical control functions are emergency stop and overtravel
stop, power outage and restart.
Separate or redundant control paths must be provided for critical control functions.
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System control paths may include communication links. Consideration must be given to the
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implications of unanticipated transmission delays or failures of the link.
Observe all accident prevention regulations and local safety guidelines.
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Each implementation of this equipment must be individually and thoroughly tested for proper

operation before being placed into service.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
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For additional information, refer to NEMA ICS 1.1 (latest edition), "Safety Guidelines for the
Application, Installation, and Maintenance of Solid State Control" and to NEMA ICS 7.1 (latest
edition), "Safety Standards for Construction and Guide for Selection, Installation and Operation of
Adjustable-Speed Drive Systems" or their equivalent governing your particular location.
INSUFFICIENT AND/OR INEFFECTIVE SAFETY-RELATED FUNCTIONS
Verify that a risk assessment as per ISO 12100 and/or other equivalent assessment has been
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performed before this product is used.
Before performing any type of work on or with this product, fully read and understand all
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pertinent manuals.
Verify that modifications do not compromise or reduce the Safety Integrity Level (SIL),
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Performance Level (PL) and/or any other safety-related requirements and capabilities defined
for your machine/process.
After modifications of any type whatsoever, restart the machine/process and verify the correct

operation and effectiveness of all functions by performing comprehensive tests for all
operating states, the defined safe state, and all potential error situations.
Failure to follow these instructions can result in death, serious injury, or equipment damage.
HR9Z-B2200 8/2020
WARNING
WARNING
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