Intended Use - Beckhoff EP1957-0022 Operating Instructions Manual

Product description
EP1957 variants
The EP1957 has an integrated safety control that can be used for user-specific applications directly
on the component. The variant EP1957-2222 does not have this functionality and represents a pure
I/O component.
4.2

Intended use

Caution - Risk of injury!
TwinSAFE components shall only be used for the purposes described below!
The TwinSAFE EtherCAT Box expands the application range of the Beckhoff system with functions that
enable it to be used for machine safety applications. The TwinSAFE Boxes are designed for machine safety
functions and directly associated industrial automation tasks. They are therefore only approved for
applications with a defined fail-safe state. This safe state is the wattless state. Fail-safety according to the
relevant standards is required.
The TwinSAFE EtherCAT Box allows the connection of:
24 V sensors such as
DC
• emergency stop push buttons, pull cord switches, position switches, two-hand switches, safety mats,
light curtains, light barriers, laser scanners etc.
• Safe sensors, which use a 24V
24 V actuators such as
DC
• Contactors, protective door switches with tumblers, valves etc.
The fail-safe principle!
The basic rule for a safety system such as TwinSAFE is that failure of a part, a system component or the
overall system must never lead to a dangerous condition. The safe state is always the switched off and
wattless state.
System limits
The TÜV SÜD certificate applies to this TwinSAFE component, the function blocks available in it, the
documentation and the engineering tool. TwinCAT 3.1 and the TwinSAFE Loader are permitted as
engineering tools. Any deviations from these procedures or tools, particularly externally generated xml files
for TwinSAFE import or externally generated automatic project creation procedures, are not covered by the
certificate.
Power supply from SELV/PELV power supply unit!
The TwinSAFE components must be supplied with 24 V
output voltage limit U
max
Commissioning test
Before the EP1957 can be used for the safety task, the user must carry out a commissioning test so that
sensor and actuator wiring errors can be ruled out.
Follow the machinery directive!
The TwinSAFE components shall only be used in machines as defined in the machinery directive.
16
supply and send safe OSSD signals.
DC
of 36 V . Failure to observe this can result in a loss of safety.
DC
Version: 2.0.0
WARNING
WARNING
WARNING
WARNING
by an SELV/PELV power supply unit with an
DC
WARNING
CAUTION
EP1957-0022 and EP1957-2222