Intended Use - Beckhoff EL1904 Operating Instructions Manual

Product description
4.2

Intended use

Caution - Risk of injury!
TwinSAFE components shall only be used for the purposes described below!
The TwinSAFE terminals expand the application range of Beckhoff Bus Terminal system with functions that
enable them to be used for machine safety applications. The TwinSAFE terminals 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 Terminals enable connection of:
• 24 V sensors (EL1904) such as
DC
emergency off pushbutton switches, pull cord switches, position switches, two-hand switches, safety
mats, light curtains, light barriers, laser scanner, etc.
• 24 V actuators (EL2904) such as
DC
contactors, protection door switches with tumbler, signal lamps, servo drives, etc.
Test pulses
When selecting actuators please ensure that the EL2904 test pulses do not lead to actuator
switching or diagnostic message from the EL2904.
The following TwinSAFE components have been developed for these tasks:
• The EL1904 is an EtherCAT Terminal with 4 digital fail-safe inputs.
• The EL2904 is an EtherCAT Terminal with 4 digital fail-safe outputs.
• The EL6900 is an EtherCAT Terminal with integrated TwinSAFE logic.
These TwinSAFE components are suitable for operation on the
• Beckhoff EKxxxx series Bus Couplers
• Beckhoff CXxxxx series Embedded PCs with E-bus connection
Power supply from SELV/PELV power supply unit!
The TwinSAFE components must be supplied with 24 V
output voltage limit U
max
Follow the machinery directive!
The TwinSAFE components shall only be used in machines as defined in the machinery directive.
Ensure traceability!
The buyer has to ensure the traceability of the device via the serial number.
Commissioning test
Before the EL1904/EL2904 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.
Use ferrules with plastic collars
When using fine-wire cables for signal connections, use ferrules with plastic collars. This leads to a higher
system availability when the test pulses for the corresponding channels are switched off.
20
of 36 V . Failure to observe this can result in a loss of safety.
DC
Version: 3.0.0
WARNING
WARNING
by an SELV/PELV power supply unit with an
DC
CAUTION
CAUTION
WARNING
CAUTION
EL1904