5 Appendix
5.2 Technical safety functions
56 Elektronischer Motorstarter EMS/Electronic Motor Starter EMS 04/15 MN03407009Z-DE/EN www.eaton.com
5.2 Technical safety functions
System conditions Unit EMS-…-ROS-… EMS-…-DOS-…
Database for failure rates SN 29500 SN 29500
System type Type B, made up of sub-systems Type B, made up of sub-systems
Applied standard IEC 61508 IEC 61508
Beta factor % 1 1
MTTF (at ambient air temperature 40 °C) a 35.7 35.7
Safe switch off
(only for EMS-…-S-… devices)
Ambient Temperature °C 40 40
MTTF
d
a 420 421
Shutdown time ms 40 (EMS-…-2,4-…)
80 (EMS-…-9-…)
40 (EMS-…-2,4-…)
80 (EMS-…-9-…)
λ
sd
[FIT] 49 47
λ
su
[FIT] 1818 1582
λ
dd
[FIT] 269 269
λ
du
[FIT] 2.7 2.4
SFF % 99.8 99.8
DCS % 2.6 2.9
DC current % 99 99
PFH 1/h 2.7 x 10
-9
2.4 x 10
-9
Safety level
according to IEC 61508-1 SIL 3 SIL 3
according to ISO 13849-1 Cat. 3 PL e Cat. 3 PL e
according to EN 954-1
Cat. 3 Cat. 3
Motor protection
Thermal overload (according
EN 60947-4-2 trip classes 10 or 10A)
Ambient temperature °C 40 40
MTTFd a 316 316
λ
sd
[FIT] 0 0
λ
su
[FIT] 1731 1550
λ
dd
[FIT] 314 314
λ
du
[FIT] 47.2 47.2
SFF % 97.7 97.9
DC % 86.9 86.9
Safety level
according IEC 61508-1 SIL 2 SIL 2
￫
For additional temperatures, the safety data can be requested
from the manufacturer.
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