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18 Rockwell Automation Publication 440G-UM003A-EN-P - February 2020
Chapter 3 Project Planning
Thorough-check Concept
Appropriately qualified safety personnel must test the safety switch during
commissioning, after modifications, and at regular intervals; see Thorough-
check Requirements on page 27 .
Regular thorough checks serve to investigate the effectiveness of the safety switch
and discover anomalies that result from modifications or external influences
(such as damage or manipulation).
The manufacturer and operating entity must define the type and frequency of the
thorough checks on the machine based on the application conditions and the risk
assessment. The process of defining the thorough checks must be documented in
a traceable manner.
Regular Thorough Check Minimum Requirements
The following thorough checks must be conducted at least once a year:
• Thorough check of the protective function of the safety switch
• Thorough check of the switch housing for damage
• Thorough check of the switch cables for damage
• Thorough check of the safety switch for signs of misuse or manipulation
• Thorough check of the locking solenoid for correct function