Technical Safety Data - Eaton EMT62 Manual

1.4 Technical safety data

1 EMT6 Thermistor Overload Relays for Machine Protection
Eaton has determined the following functional safety characteristics for
EMT6-K, EMT6-KDB, and ENMT6-DBK thermistor overload relays for
machine protection:
As per Table 1 of DIN EN 50495/2010, the requirements for safety integrity
level SIL 1 apply to the safety device. This corresponds to a Performance
Level of PL c as per Table 4 of DIN EN ISO 13849-1.
ATEX-specific safety data as defined in DIN EN ISO 13849-1
The motor protection function of EMT6... thermistor overload relays for
machine protection, as defined in ATEX, is characterized by the following
safety data:
Performance level acc. to DIN EN ISO 13849-1
Device category acc. to DIN EN ISO 13849-1
MTTF for 40 °C
d
MTTF for 60 °C
d
ATEX-specific safety data as defined in DIN EN 61508-2
The motor protection function of EMT6... thermistor overload relays for
machine protection, as defined in ATEX, is characterized by the following
safety data:
Safety integrity level
Architecture
Hardware fault tolerance HFT
Failure rate for undetected safe failures (λ
Failure rate for detected safe failures (λ
Failure rate for undetected dangerous failures (λ
Failure rate for detected dangerous failures (λ
Average probability of a dangerous failure when the
safety function (PFD) is on demand, using an interval of
36 months for repeat test T1:
￫
Information regarding failure rates at higher ambient
temperatures (> 40 °C) is available on request.
EMT6 10/16 MN03407006Z-DE/EN www.eaton.com
c
1
56.6 years
35.6 years
SIL 1
1oo1
0
) 278.09 x 10
su
) 1001.67 x 10
sd
) 1026.25 x 10
du
-9
) 78.80 x 10
dd
-2
1.35 x 10 /h
(Requirement for SIL 1 as per
standard ≧ 10
1.4 Technical safety data
-9
/h
-9
/h
-9
/h
/h
-2 -1
/h to 10 /h)
43