1.4.3
Abbreviations
Abbrevi-
ation
English term
Description
B
10D
–
Number of cycles until dangerous failure of 10% of the
components (per channel)
MTTF
D
Mean time to Failure Dan-
gerous
Mean time to dangerous failure (per channel)
DC
Diagnostic Coverage
Diagnostic coverage
PL
Performance Level
Discrete level that specifies the ability of safety-related
devices to execute a safety function under foreseeable
conditions.
PFH
D
Probability of Failure per
Hour Dangerous
Average probability of a dangerous failure per hour
SIL
Safety Integrity Level
Safety integrity level
Tab. 5 Abbreviations
2
Safety
2.1
Safety instructions
–
Only use the product in original status without unauthorised modifications. Only the conversions
and modifications described in this and the additional documents are permitted.
–
Only use the product if it is in perfect technical condition.
–
Observe further applicable documents.
–
Observe labelling on the product.
–
Installation, commissioning, maintenance and disassembly should only be conducted by qualified
personnel.
–
Observe the mounting and connection specifications.
–
Take into consideration the ambient conditions at the location of use.
–
Comply with specified critical limits.
–
The cable must not be crushed by objects.
–
Do not route the cable over sharp edges.
–
Select the cable length to ensure sufficient access to the danger zone.
–
Ensure that people do not trip over the cable and cause the product to fall to the floor.
–
When not in use, place and attach the product to the existing wall bracket.
–
The product must be stored in such a way that control elements cannot be actuated or damaged.
–
Foreign matter or liquids must not penetrate the product.
–
Check the product if damage is suspected.
–
Never place the product on unstable surfaces.
–
Never place the product near heat sources.
Safety
8
Festo — CDSA-D3-RV — 2020-08
