ABB UMC100.3 Manual page 155

T E C H N I C A L D ATA
Characteristic values according to IEC 61508
The following characteristic values apply at an ambient temperature of 40 °C and AC load with spark suppression circuits at the
relay outputs. Characteristic values for other operating conditions are available on request.
Architecture
SIL
SFF (Safe Failure Fraction)
Lambda dangerous undetected (LDU)
Lambda dangerous detected (LDD)
Lambda safe undetected (LSU)
Lambda safe detected (LSD)
Safety requirements
Probability of failure on demand (PFD)
at T
at T
T = proof test
1
Characteristic values according to ISO 13849
The following characteristic values apply at an ambient temperature of 40 °C and AC load with spark suppression circuits at the re-
lay outputs. Characteristic values for other operating conditions are available on request.
Category
Performance Level
MTTFd
MTBF
= 10 years
1
= 3 years
1
UMC100.3 DC
1oo1 with diagnosis
1
84,4%
1,64 x 10
-7
4.11 x 10
-7
3,73 x 10
-7
1.31 x 10
-7
Low demand
7.18 x 10 -3
2.2 x 10
-3
UMC100.3 DC
2
C
199 years
74 years
UMC100.3 UC
1oo1 with diagnosis
1
87,7%
1,92 x 10
-7
4.20 x 10
-7
8,35 x 10
-7
1.32 x 10
-7
Low demand
8.42 x 10 -3
2.5 x 10
-3
UMC100.3 UC
2
C
186 years
56 years
155