Pepperl+Fuchs FYQLA1-140R-3 Instruction Manual page 21

Door Interrupt System with FYQLA1-140R-3 Logic Amplifier
Product specifications (cont.)
Functional safety related parameters*
Safety function
Safe state
Standards/regulations
Performance level acc. to ISO 13849-1
Structure acc. to ISO 13849-1
MTTF (years)
d
DC
d
PFH
CCF
T (years)
M
Pollution degree
Over-voltage category
Rated insulation voltage
Protection degree
Housing material
Internal hardware diagnostic fault
detection
*The following assumptions were made during the failure modes, effects, and diagnostic analysis (FMEDA) of the
FYQLA1-140R-3:
• Failure rates are constant, wear out mechanisms are not included.
• Failure rates are based on the Siemens standard SN29500.
• Power supply failures are not included in the FMEDA, a loss of power introduces the safe state.
• It was assumed that the appearance of a safe error (e. g., output in safe state) would be repaired within 8
hours (e. g., remove sensor burnout).
• During the absence of the device for repairing, measures have to be taken to ensure the safety function (for
example: substitution by an equivalent device).
• The stress levels are average for an industrial environment and can be compared to the Ground Fixed
Classification of MIL-HDBK-217F. Alternatively, the assumed environment is similar to IEC 60654-1 Class C
(sheltered location) with temperature limits within the manufacturer's rating and an average temperature over
a long period of time of 40 °C. Humidity levels are assumed within manufacturer's rating. For a higher average
temperature of 60 °C, the failure rates should be multiplied with an experience based factor of 2.5. A similar
multiplier should be used if frequent temperature fluctuation must be assumed.
Relay output closed only when sensors activated by
appropriate target
Relay output open
ISO 13849-1 :2015/UL 508
PL d
Category 3
75850
98.6 %
-7
2.06 x 10E
5 %
20
2
(OC) II
250 V
IP20, Class 1 "indoor use only"
304 stainless steel
< 4 s
21