SICK S3000 Cold Store

Configuration of the safety laser scanner with restart interlock
Figure 50: Schematic representation of operation with restart interlock
NOTE
D
o not confuse the restart interlock with the start interlock on the machine. The start
interlock prevents the machine from starting after switching on. The restart interlock
prevents the machine from starting again after a fault or an interruption in the protec‐
tive field.
The OSSDs on the safety laser scanner switch to the OFF state to initiate a machine 1
or v
ehicle stop as soon as there is an object in the protective field 2. They do not
switch to the ON state 3, even if there is no longer an object in the protective field. The
OSSDs only switch to the ON state once the operator activates the control switch for
restart or reset.
WARNING
D
angerous state of the machine
If the control switch for restart or reset is operated while a person is in the hazardous
area, the machine could restart.
b
Place the control switch for restart or reset outside the hazardous area such that it
cannot be operated by a person in the hazardous area.
b
Place the control switch for restart or reset outside the hazardous area such that
the person who operates the control switch has a full view of the hazardous area.
NOTE
•
If y
ou do not use the internal restart interlock, leave the inputs disconnected.
Reset
NOTE
T
he reset function is often also called “preparation for restart”. In these operating
instructions the term reset is used.
If the restart interlock on the safety laser scanner (internal) is activated, and also a
r
estart interlock on the machine (external) is implemented, then each restart interlock
has its own control switch.
After operating the control switch for the internal restart interlock (with the protective
field clear), the safety laser scanner responds as follows:
•
It switches its OSSDs to the ON state.
•
The LED Ë on the safety laser scanner illuminates green.
The external restart interlock prevents the machine from restarting. After resetting the
safety laser scanner, the operator must activate the control switch to restart the
machine controller.
CONFIGURATION 7
8012029/ZA20/2019-11-14 | SICK O P E R A T I N G I N S T R U C T I O N S | S3000 Cold Store
77
Subject to change without notice