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SICK MSL
8 007 653/09-04-01 Technical Description • MSL © SICK AG • Safety Systems • Germany • All rights reserved
6 Operating modes
In the case of MSL multi-beam
photoelectric safety switches, it is
possible to select different operating
modes at the device (depending on
requirements).
6.1 Self configuration
If you wish to configure the device
yourself, SICK offers training to
provide the necessary know-how.
6.2 Restart inhibit
(restart switch)
‡
Without restart inhibit:
When the protective field has
been broken and released again,
the protective field is automati-
cally reactivated to be actuated
(e. g. start button), and the MC
can continue its hazardous
motion once the beam path is
free. In this case, the restart
inhibit must be an element of
the MC's control system.
‡
With restart inhibit:
When the protective field has
been broken and released again,
then outputs are only reactivat-
ed after a command unit has
been actuated. The MC can
then continue its hazardous
motion once the light beam is
free.
6.3 External device
monitoring (EDM)
External device monitoring is a
safety function which checks to
ensure that the contacts and relays
directly connected to the outputs
are functioning correctly.
Deselecting external device
monitoring
‡ If a reliable PLC is used
‡ If external device monitoring is
used in the machine control
system
Electrical connection of the receiver
unit and the exact functional
principle are described in
7.3.3
External device monitoring input
.
The voltage supply must be
disconnected when the operating
mode is changed.
6.4 Muting with
additional MSM
module
Transporting material to the
production site without interrupting
operating procedures is a problem
often faced in automatic production
processes.
The photoelectric safety switch is
not able to distinguish between
material and personnel.
The muting circuit with its external
sensors as additional module is a
solution to this problem. Muting
briefly deactivates the protective
field provided by the photoelectric
switch to allow objects to be
transported into the danger area.
The interaction of the photoelectric
light switch, the muting sensors, and
the muting controller in the addi-
tional module enable the system to
make a simple distinction between
personnel and transported objects,
and this in turn ensures safety.
Detailed functional and connection
information can be found in the
Technical description MSM
.
6 Operating modes
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