The OSSDs on the safety laser scanner switch to the OFF state to initiate a machine
1
or vehicle 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
Dangerous 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
•
For examples on connecting the internal restart interlock,
•
If you do not use the internal restart interlock, leave the inputs disconnected.
NOTE
The reset function is often also called “preparation for restart”. In these operating
instructions the term
is used.
If the restart interlock on the safety laser scanner (internal) is activated, and also a
restart 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.
The controller must be implemented such that the machine only restarts if the safety
laser scanner is first reset and then the control switch for restarting the machine con‐
troller is activated.
Further topics
•
"Measures to prevent unsecured areas", page 31
•
"EFI status information and control commands", page 132
•
CONFIGURATION
7
8010948/ZA21/2020-06-18 | SICK
O P E R A T I N G I N S T R U C T I O N S | S300
87
Subject to change without notice