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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 (KL1904) 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 (KL2904, KL6904) such as
DC
contactors, protection door switches with tumbler, signal lamps, servo drives, etc.
Test pulses
When selecting actuators please ensure that the KL6904 test pulses do not lead to actuator
switching or diagnostic message from the KL6904. The test pulses of the KL6904 terminal outputs
are not configurable and cannot be switched off.
The following TwinSAFE components have been developed for these tasks:
• The KL1904 terminal is an input module with digital inputs.
• The KL2904 terminal is an output module with digital outputs.
• The KL6904 terminal is a logic module with digital outputs.
These TwinSAFE components are suitable for operation on the
• Beckhoff BKxxxx series Bus Couplers
• Beckhoff BXxxxx series Bus Terminal Controllers (with firmware version ≥ 1.20) (Beckhoff BCxxxx
series Bus Terminal Controllers are not supported!)
• Beckhoff CXxxxx series Embedded PCs with K-bus connection
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 TwinSAFE terminal 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.
KL6904
WARNING
CAUTION
CAUTION
WARNING
Version: 3.0.0
Product description
21
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