User Documentation
Table Of Contents
- 1.1 Revision history
- 1.2 Validity
- 1.3 Contact address
- Table of contents
- 2. Observed standards
- 3. Acronyms and abbreviations
- 4. Purpose of the product
- 5. Assumptions and restrictions for use of the product
- 6. Functional specification of the safety functions
- 7. Functional specification of the non-safety functions
- 8. Safety parameters
- 9. Failure category SIL 2
- 10. Hardware and software configuration
- 11. Periodic proof test procedure
- 12. Procedures to repair or replace the product
- 13. Maintenance
- 14. Connection diagram
Periodic proof test procedure
14 1482850000/01/11.2017
11. Periodic proof test procedure
Step
Action
1
Bypass the safety PLC or take other appropriate action to avoid a false trip.
2
Connect a simulator identical to the input setup.
3
Apply input value corresponding to 0/100 % output range to each channel.
4
Observe whether the output channel acts as expected.
5
Restore the input terminals to full operation.
6
Remove the bypass from the safety PLC or otherwise restore normal operation.
This test will detect approximately 95 % of possible “DU” (dangerous undetected) failures in the pulse
isolator. The proof test is equivalent to the functional test.