Safety Parameters; Characteristic Curve Of The Inputs; Fig. 3 Characteristic Curve Of The Inputs - Beckhoff EP1908 Operating Instructions Manual

Product description
4.4

Safety parameters

Key figures
Lifetime [a]
Prooftest Interval [a]
PFH
D
%SIL3
PFD
%SIL3
MTTF
d
DC
Performance level
Category
HFT
2
Element classification
1. Special proof tests throughout the service life of the EtherCAT Box are not required.
2. Classification according to EN 61508-2:2010 (see chapters 7.4.4.1.2 and 7.4.4.1.3)
The EP1908-0002 EtherCAT Box can be used for safety-related applications according to IEC 61508 up to
SIL3 and EN ISO 13849-1 up to PL e (Cat4).
For the calculation or estimation of the MTTF
the TwinSAFE application manual or in ISO 13849-1:2015 Table K.1.
4.5

Characteristic curve of the inputs

The characteristic curve of the inputs is similar to type 3 according to EN 61131-2.
Fig. 3: Characteristic curve of the inputs
18
EP1908-0002
20
1
not required
1.56E-09
1,56%
1.06E-04
10,59%
high
high
PL e
4
1
Type B
value from the PFH value, further information can be found in
d D
Version: 3.0.0 EP1908