Basic Safety Data - ABB FSO-21 User Manual

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Basic safety data

The FSO-21 module is a type B safety component as defined in IEC 61508-2.
The FSO-21 data related to safety standards IEC 61508, EN/IEC 61800-5-2,
EN ISO 13849-1 and EN/IEC 62061 is listed below for the different subsystems
within the FSO module.
The given safety data applies with proof test interval T1 = 20 years (high demand and
continuous mode of operation) and T1 = 2 years or T1 = 5 years (low demand mode
of operation). Make sure that the proof test is performed within this time (see also
section Proof tests
EN 61508
SIL up to 3
SC 3
PROFI-
1)
safe
SIL/SILCL 3
PL e
PFH (1/h) 1.0E-09 5.1E-10
PFD 8.8E-05 4.8E-06
avg
(T1 = 2 a)
PFD 8.8E-05 1.2-E5
avg
(T1 = 5 a)
MTTF (a) 114155
D
HFT N/A
Cat. N/A
SFF (%) N/A
DC (%) N/A
1)
We assume conservatively that PFH = λd = 1, FIT = 1e-9 1/h,
MTTF = 1/λd = 1/(1e-9 1/h) = 1e9 h = 114155 a. Based on the BGIA Report 2/2008e:
D
Functional Safety of Machine Controls – Application of EN ISO 13849, ch. 6.2.17.
2)
Either logic subsystem (Logic 1 or Logic 2) is included in each safety function implemented
with the FSO. If the safety function contains any 1-channel digital input or output of the FSO
with non-pulsed signals, the subsystem "Logic 1" must be used. Otherwise the subsystem
"Logic 2" is used.
on page 424).
EN ISO 13849-1
PL
1-ch. DI, 2-ch. DI,
pulses pulses
3 3
d e
1.8E-12
2.4E-08
4.8E-08
17844 12648
0 1
2 3
99.64 99.94
91.99 99.00
up to e SILCL
1-ch. DI, 2-ch. DI,
no pulses no pulses
2 3
c e
9.0E-09 2.3E-12
7.9E-05 2.8E-08
2.0E-04 5.8E-08
12648 12648
0 1
1 3
94.02 99.92
0.00 98.74
Technical data 433
EN/IEC 62061
3
3AXD10000289254.xlsm G
Logic 1, Logic 2,
1-ch. DI or other
DO, no cases
2)
pulses
1 3
c e
4.5E-09 4.4E-11
5.2E-05 4.1E-07
1.3E-04 9.9E-07
5048 5048
0 1
1 3
86.82 93.48
80.26 90.23
3AXD10000289254.xlsm G
2)