SICK nanoScan3 I/O

First, the operator must press a reset pushbutton to return the protective device to
monit
oring status. Then, in a second step, the operator can restart the machine.
Prerequisites
•
The control switch for resetting the restart interlock (reset button) is mounted out‐
side the hazardous area.
•
Persons within the hazardous area cannot operate the reset button.
•
Any person operating the control switch can view the entire hazardous area.
Internal restart interlock
Each safety output of the safety laser scanner is equipped with a configurable internal
restart interlock.
When the internal restart interlock is used, the following sequence is the result for the
machine operator:
1 A safety output of the safety laser scanner switches to the OFF state, if there is an
interruption in the protective field.
2 The safety output remains in the OFF state when there is no longer an object in
the protective field.
3 The safety output only switches back to the ON state when the operator presses
the reset pushbutton, which is outside the hazardous area. If there is an object in
the protective field when the reset pushbutton is pressed, the safety output stays
in the OFF state.
4 After the reset, the operator can restart the machine in a second step.
Figure 29: How the restart interlock works (1): no one in protective field, machine operates
PROJECT PLANNING 4
8024596/15VP/2019-11-15 | SICK O P E R A T I N G I N S T R U C T I O N S | nanoScan3 I/O
41
Subject to change without notice