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3.2 Appropriate use
Caution – Risk of injury!
TwinSAFE terminals may only be used for the purposes described below!
WARNING
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, pull cord switches, position switches, two-hand switches, safety
mats, light curtains, light barriers, laser scanners etc.
•
24 V
actuators (KL2904, KL6904) such as
DC
contactors, protection door switches with tumbler, signal lamps, servo drives etc.
Note
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 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 terminals may only be used in machines according to the Machinery
CAUTION
Directive.
Ensure traceability
The buyer has to ensure the traceability of the device via the serial number.
CAUTION
KL6904
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.
Product description
11
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