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.
