Chapter 2 Operating Instructions
TR4
60 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 8014467/YTD7/2016-03-30
Subject to change without notice
On safety
en
2.2 Applications of the safety switches
The safety switches of type TR4 Direct are transponder safety switches
that are switched electrosensitively by actuators (transponders).
They monitor moveable guards as follows:
• The dangerous state of the machine or system can only be switched
on when the guards are closed.
• If a guard is opened when the machine is running, a stop command
is triggered.
For the control this means:
• Switch on commands that produce dangerous states are only allowed
to become effective when the guards are closed.
• Dangerous states must be brought to an end before the protective
setting is removed or a guard is opened.
Prior to the use of the safety switches, a risk assessment must be per-
formed 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 inspec-
tion as per section 2.4 “General safety notes and protective measures”.
2.3 Correct use
The TR4 series safety switches must be used only as defined in sec-
tion 2.2 “Applications of the safety switches”. The safety switches are
only allowed to be installed by qualified safety personnel and are only
allowed to be used on the machine on which they have been installed
and initialized by qualified safety personnel as per these operating
instructions.
All warranty claims against SICK AG are forfeited in the case of any
other use, or alterations being made to devices, even as part of their
mounting or installation.
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