Nord Drivesystems SK 530P - Page 57

8 Technical Data
BU 0630 en-2020 57
Response time
(time between input change from High
to Low level and triggering of the
safety sub-function.)
≤ 130 ms
≤ 140 ms
≤ 10 ms
Cycle time
(time between two identical flanks at
the input)
≥ 1 s
Fault response time
(The time between detection of a fault
and triggering of the fault response
function.)
–
≤ 35 ms
Fault response function
–
Inverter shut-down
(behaviour as for STO)
Priority
Highest
Low
Source of failure rates
SN 29500 at ambient temperature: 40°C (S1 operation) or
50°C (S3 operation with ED = 70%)
Special device SK 5x0P-751-340-S3: 40°C (S3 operation with ED = 70%)
or 50°C (S3 operation with ED = 50%)
Conformant object
Type B
Hardware error tolerance
HFT 0
Proportion of safe failures
SFF = 100%
SFF = 97.89%
Probability of a hazardous failure
per hour
PFH = 0
PFH = 11.33 FIT
Mean time until hazardous failure
MTTF
d
= "High" (> 100 years)
Diagnostic coverage level
cannot be determined (PFH = 0)
DC = 92.85% (“average”)
Safety integrity level
(as per IEC 61800-5-2:2016 and
IEC 61508:2010)
SIL 3
SIL 2
Category
(as per EN ISO 13849-1:2016)
Category 4 Category 2
Performance Level
(as per EN ISO 13849-1:2016)
PL e
PL d
Proof Test Interval
TM = 20 years (duration of use, “Mission Time”)
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