Protection Against Tampering - SICK Standard IN4000 Instrucciones De Servicio

en
Chapter 3

WARNING
78
Product description
3.7

Protection against tampering

The inductive safety switches react to metal objects,
e.g. the frame of a safety door. Other metal objects
that are not to trigger the safety function must never
reach the sensing face of the safety switches.
Suitable measures must be taken to prevent this
situation arising.
The safety switch is protected against simple bypassing
with the following switching behaviour:
• The output is operated without delay on the slow
approach of a metal object to the enable zone,
however this situation is only indicated by the signal
LED with a time delay of approx. 3 s. As a result the
object is in general in the near range zone before the
signal LED illuminates. The technical regulations in
relation to restarting the system are to be observed.
• If this object remains in the near range zone for
longer than approx. 2 s, the output is completely
inhibited and no longer enabled on the presence of
activation in the enable zone. If the object remains
in the near range zone for longer than approx. 5 s,
the adjustment mode is activated (see section 5.3).
The enable zone inhibit can be lifted either
• by removing the activation (> 30 mm) for a period of
more than 2 s
or
• by interrupting the power supply (see section 5.3)
© SICK AG • Germany • All rights reserved
Operating Instructions
IN4000 Standard
8010934/ZWG9/2018-07-26
Subject to change without notice