Symbols And References Used In This Document; Safety Notes; Specified Use Of The Device - SICK LE20 Instrucciones De Operación

Operating Instructions
LE 20
Note
E x p l a n a t i o n
Recommendation
WARNING
8 008 685/Q913/2007-05-21

Safety notes

1
Symbols and references used
in this document
Selected items of information in these operating instructions have
been emphasised to make the details easier to locate.
A note gives information concerning special features of the device.
An explanation provides background information which is intended
to broaden your understanding of the technical aspects associated
with operation of the device.
A recommendation will help you to perform the respective action
with optimum efficiency.
Warning !
Danger possible in event of failure to comply.
Always read warning notes thoroughly and follow them carefully.
2
Safety notes
The device can only perform its safety task if it is used and
incorporated correctly in the process sequence.
The LE 20 safety evaluation unit satisfies the demands of EN
61496 Safety Category 2.
2.1

Specified use of the device

The LE 20 safety evaluation device should only be used in
conjunction with the C 2000 safety light curtain, the M 2000 multi-
beam photoelectric safety switch, or suitable testable single-beam
photoelectric safety switches. It forms the interface between the
machine control unit and the photoelectric switch. It periodically
checks that the connected photoelectric switches are functioning
correctly in accordance with Category 2 requirements, and stops
the dangerous movement in the event of a fault. Furthermore, it
provides a photoelectric switch system with additional safety and
monitoring functions.
Operation of the device is only permitted in accordance with its
technical specifications.
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