Beckhoff EP1957-0022 User Manual

Product description
EP1957-0022 and EP1957-2222 19Version: 2.0.0
Product designation EP1957-0022 and EP1957-2222
Approvals CE, TÜV SÜD
4.4 Safety parameters
Key data EP1957-0022 and EP1957-2222
Lifetime [a] 20
Proof test interval [a] not required
1
PFH
D
6.50E-09
PFD 8.30E-05
MTTF
D
high
DC high
Performance level PL e
Category 4
HFT 1
Classification element
2
Type B
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
D
value from the PFH
D
value can be found in the
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.
DANGER
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.
DANGER
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.

Beckhoff EP1957-0022 Specifications

General

Brand	Beckhoff
Model	EP1957-0022
Category	Portable Generator
Language	English