Danfoss VLT FC 280 Operating Manual page 101

Operating Guide | VLT® Midi Drive FC 280
Table 45: Safety Functions via Digital Input (T37/T38)
ISO 13849-1
Safety performance
Category
Diagnostic coverage (DC)
Mean time to dangerous failure (MTTF
Performance level
IEC 61508/IEC 61800-5-2
Safety Integrity Level
SIL Claim Limit (SIL CL)
Probability of dangerous failure on demand (PFD
Probability of dangerous failure per hour (PFH)
Safe failure fraction (SFF)
Hardware fault tolerance (HFT)
Failure rates of 1oo1 part
Failure rates of 1oo2 part
Proof test interval (PTI)
Mission time
Common cause failure (CCF)
Diagnostic test interval (DTI)
Systematic capability
Operation mode
STO reaction time Input to output response time
1) PFD is not suitable for the drive due to the fact that it is assumed to be working in high or continuous mode in IEC 61800-5-2. Here, PFD
avg
9
2) 1 FIT=1/(10 hour).
3) STO reaction time via digital input is the amount of time from an input signal condition triggers the STO until the torque is removed from the motor interface.
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(continued)
)
D
avg
(3)
Cat.3
90%<DC <99% (medium)
avg
350 years (high)
PL e
SIL3
(1) -4
) 2.5x10
(2)
9.0 FIT
For dual-channel parts: >93%
For single-channel parts: >99%
For dual-channel parts: HFT=1
For single-channel parts: HFT=0
-7
λ
=9.3x10
S
-8
λ
=2.0x10
D
-8
λ
=1.9x10
DD
-9
λ
=1.3x10
DU
-7
λ
=4.6x10
S
-7
λ
=3.1x10
D
-7
λ
=2.9x10
DD
-8
λ
=2.4x10
DU
20 years
20 years
β=5%; β =2%
D
<10 minutes
SC 3
Low/High/Continuous demand mode
≤110 ms
is for reference purposes only.
avg
AQ381425076031en-000201 / 130R1223 |
Safety Functions
101