Chapter
3
Operating Instructions
miniTwin2
20
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8013482/YT85/2016-02-23
Subject to change without notice
Product description
The possible combinations of reset and restart interlock are shown in the following table:
Reset function of
the miniTwin2
Restart interlock of
the machine
Permissible
application
Deactivated
Deactivated
Only if the safety light curtain cannot be stood
behind. Observe EN 60 204
A
1!
Deactivated Activated
All
Activated
Deactivated
Only if the safety light curtain cannot be stood
behind. Observe EN 60 204
A
1!
Note:
It must be ensured that with the power
supply to the machine switched on, access to
the hazardous area is only possible via the
active protective field on the safety light
curtain.
If this condition is not met, e.g. during main-
tenance work on the machine with a side
cover open, it is imperative the supply of
power to the machine is interrupted!
Activated
Activated
All (see “Reset and restart interlock on the
machine” further below).
It is imperative you configure the application with restart interlock if it is possible to
stand behind the safety light curtain!
The miniTwin2 is unable to verify if the restart interlock of the machine is operable. If in
applications in which it is possible to stand behind the safety light curtain you deactivate
both the internal Reset function and the external restart interlock, you will place the
machine operator in acute danger.
The electrical connection of the reset button is described in section 5.4 “Reset button”
on page 48.
Section 6.5 “Configuration of the Reset function” on page 55 describes how to con-
figure the function.
Reset and restart interlock on the machine
If you activate reset on the miniTwin2 and implement a restart interlock on the machine,
then reset and restart interlock each have a dedicated button.
After actuation of the reset button …
the miniTwin2 activates the output signal switching devices.
the safety light curtain switches to green.
Only the external restart interlock prevents the machine from restarting. After pressing the
reset button for the miniTwin2, the operator must also press the restart button for the
machine. If the reset button and the restart button are not pressed in the specified
sequence, the dangerous state remains disrupted.
The reset button prevents the accidental and inadvertent operation of the external restart
button. The operator must first acknowledge the safe state with the reset button.
Tab. 3: Permissible
configuration of the restart
interlock
WARNING
Notes
Recommendation
