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Product designation
Approvals
4.4
Safety parameters
Key data
Lifetime [a]
Proof test interval [a]
PFH
D
PFD
MTTF
D
DC
Performance level
Category
HFT
2
Classification element
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 EtherCAT Box can be used for safety-related applications according to IEC 61508:2010 up to SIL 3 and
EN ISO 13849-1:2015 up to PL e (Cat 4).
Further information on calculating or estimating the MTTF
TwinSAFE Application Guide or in EN ISO 13849-1:2015, Table K.1.
In terms of safety-related parameters, the Safety-over-EtherCAT communication is already considered with
1% of SIL 3 according to the protocol specification.
4.5
Safe inputs and outputs
The safe input modules and corresponding clock outputs have a two-channel design. This has the
advantage that a two-channel safe sensor with an M12 connection can be used, and a fault such as cross-
circuit or external feed results in shutdown of the whole module.
The safe output modules have a single-channel design.
Clocked signals inside a sheathed cable
If clocked signals (clock outputs for the safe inputs and safe outputs) of different modules are used within a
sheathed cable, a fault in one module, such as cross-circuit or external feed, must lead to the disconnection
of all these modules. This is achieved by setting the Module Fault Link active parameter for all modules
involved. This parameter is set to TRUE by default. The parameter acts separately for the input and output
modules.
Safe inputs in Cat.4 / PL e
If two safe input channels are to be used in a category 4 structure that are not on one M12 connector,
please make sure to combine always an even and an odd channel number.
EP1957-0022 and EP1957-2222
EP1957-0022 and EP1957-2222
CE, TÜV SÜD
EP1957-0022 and EP1957-2222
20
1
not required
6.50E-09
8.30E-05
high
high
PL e
4
1
Type B
value from the PFH
D
DANGER
DANGER
Version: 2.0.0
Product description
value can be found in the
D
19
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