ABB BT50 Manual - Page 13
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10 Functional Safety Data
Functional Safety Data BT50(T)
Parameters acc. to IEC 61508
Device type
Mode of operation
HFT
SIL
Safety function
λ
s
λ
dd
λ
= λ
du
d
λ
tot
SFF
MTTF
d
PFH
PFD
for T
= 1 year
avg
proof
PFD
for T
= 2 years
avg
proof
Response time at deactivation
Life Time
The function of the devices has to be checked within the proof test interval (T
2TLC172316M0201, rev E
2015-09-30
Values
A
Low Demand Mode or High Demand Mode
1
3
Output relays in OFF state when input is de-energized
7562.2 FIT
0 FIT
576 FIT
8138.2 FIT
93%
9337 years
-8
1.22 x 10
1/h
-5
5.25 x 10
-4
1.09 x 10
< 20 ms
20 years
proof
13
).
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