Technical data 523
FSE-31 pulse encoder interface module
The FSE-31 module is a type B safety component as defined in IEC 61508-2.
The FSE-31 data related to safety standards IEC 61508, EN/IEC 61800-5-2,
EN ISO 13849-1 and EN/IEC 62061 is listed below.
The maximum useful mission time (T
m
) for the FSE module is 20 years. After 20
years, the module must be replaced.
The given safety data is applicable with proof test interval T1 = 20 years (high
demand and continuous mode of operation), or T1 = 2 or 5 years (low demand mode
of operation). Make sure that the proof test is performed within this time (see also
section Proof test intervals during operation on page 487).
1-ch. DO,
pulses
2-ch. DO,
pulses
1-ch. DO,
no
pulses
2-ch. DO,
no
pulses
STO
output
Speed
estimate,
worst
case
values
Speed
measure-
ment
with
FSE-31
SIL 3313333
PL deceeee
PFH (1/h)
(T1 = 20 a)
6.3E-10 1.7E-10 4.9E-09 2.2E-10 1.8E-11 1.0E-08 6.4E-08
PFD
avg
(T1 =2 a)
3.8E-07 1.5E-06 2.3E-06 2.4E-06 1.6E-07 1.4E-04 9.7E-05
PFD
avg
(T1 =5 a)
9.6E-07 3.7E-06 5.7E-06 5.9E-06 3.9E-07 2.7E-04 9.9E-04
PFD
avg
(T1 = 20 a)
3.8E-06 1.5E-05 2.3E-05 2.4E-05 1.6E-06 5.0E-04 -
MTTF
D
(a) 2412 2406 2412 2412 321699 164 3360
HFT 0101101
Cat. 2313333
SFF (%) 99.5 97.5 96.2 96.6 99.4 99.0 96.8
DC (%) 98.7 92.9 89.6 90.7 99.0 99.0 96.6
3AXD10001287182 C
SIL PL SFF
(%)
PFH
(T1 = 20 a)
(1/h)
PFD
avg
(T1 = 2 a)
PFD
avg
(T1 = 5 a)
MTTF
D
(a)
DC
(%)
SC Cat. HFT CCF
3 e 96.84 6.36E-08 9.73E-05 9.85E-04 3360 97 3 3 1 80
3AXD10000289254 L
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