4 safety parameters, 5 characteristic curve of the inputs – BECKHOFF EL1904 User Manual
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Product description
EL1904
15
Product designation
EL1904
Permissible installation position
see section The TwinSAFE terminals must be
installed in a control cabinet or terminal box with
IP54 protection class according to IEC 60529 as a
minimum.
Approvals
CE, cULus, ATEX, TÜV SÜD
3.4 Safety parameters
Key figures
EL1904
Lifetime [a]
20
Prooftest Interval [a]
not required
1)
PFH 1.11E-09
%SIL3 1.11%
PFD 8.29E-05
%SIL3 8.29%
MTTFd [a]
>100
DC >99%
Performance level
PL e
Category 4
HFT 1
Element classification
2)
Type
A
1)
Special proof tests are not required during the entire service life of the EL1904 EtherCAT terminal.
2
) Classification according to IEC 61508-2:2010 (chapters 7.4.4.1.2 and 7.4.4.1.3)
The EL1904 EtherCAT Terminal can be used for safety-related applications within the meaning of
IEC 61508:2010 up to SIL3 and EN ISO 13849-1 up to PL e (Cat4).
3.5 Characteristic curve of the inputs
The characteristic curve of the inputs is similar to type 3 according to EN 61131-2.
OFF
5
10
15
20
25
30
V
in
(V)
I
in
(mA)
1
2
3
4
5
6
ON