Applications Of The Safety Switches - SICK IN4000 Direct Manual Del Usuario

en
Chapter 2
56
On safety
2.2

Applications of the safety switches

The safety switches of the IN4000 Direct series are
inductive sensors that are actuated electro-sensitively
by metal. The safe state is the unpowered state (logical
"0" on an OSSD).
Using the safety switches in the IN4000 Direct series
and the related machine or system control, the posi-
tions of moving machines or parts of machines can be
protected such that ...
• the dangerous state of the machine or system can
then only be switched on if these are in the safe
position.
• a stop command is triggered if the safe area or safe
position is left with the machine in operation.
For the control this means that ...
• switch-on commands that result in dangerous states
are then only allowed to become effective if the
moving parts of the machine are in the safe position,
and
• dangerous states must be terminated before the
protective position is left.
Prior to the use of the safety switches, a risk assess-
ment must be performed on the machine.
Correct use includes observance of the applicable
requirements on installation and operation.
The safety switches must be regularly subjected to a
technical inspection (see section 6.2 on page 78).
© SICK AG • Germany • All rights reserved
Operating instructions
IN4000 Direct
8012183/ZWH0/2018-06-05
Subject to change without notice