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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 stop push buttons, rope pull switches, position switches, two hand switches, safety
switching mats, light curtains, light barriers, laser scanners, etc.
• 24 V
actuators (KL2904) such as
DC
contactors, protective door switches with tumbler, signal lamps, servo drives, etc.
Test pulses
When selecting actuators please ensure that the KL2904 test pulses do not lead to actuator
switching or diagnosis message from the KL2904.
The test pulses of the KL2904 terminal outputs are not configurable and cannot be switched off.
The following modules were 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 modules are suitable for operation with
• Beckhoff BKxxxx series Bus Couplers
• Beckhoff Bus Terminal Controllers of the BXxxxx series (with firmware version ≥ 1.20) (Beckhoff Bus
Terminal Controllers of the BCxxxx series 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 faults can be ruled out.
KL2904
WARNING
CAUTION
CAUTION
WARNING
Version: 3.1.0
Product description
21
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