Rockwell Automation 442L-SFZNMN SafeZone Mini Safety Laser Scanner User Manual - Manual (Page 21)

Rockwell Automation Publication 10000337275 Ver 01—October 2014 19
Chapter 4 Configurable functions
Configuration of the SafeZone Mini with restart interlock
Fig. 8: Schematic outline of the
operation with restart interlock
Note Do not confuse the restart interlock with the starting interlock on the machine. The starting interlock prevents the
machine starting after switching on. The restart interlock prevents the machine starting again after an error or a
protective field infringement.
The OSSDs on the SafeZone Mini change to the OFF state to initiate a machine  or vehicle stop as soon as there is an
object in the protective field . They do not change to the ON state , even if there is no longer an object in the
protective field. The OSSDs only change to the ON state if the operator operates the control switch for restart or reset.
Place the control switch for restart or reset outside the hazardous area in a place where it can clearly be
seen from the hazardous area!
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. Ensure that the person who operates the control switch has a full view of the hazardous area.
Notes • You will find examples on the connection of the internal restart interlock in Chapter 7, “Connection diagrams” on
page 43.
• If you do not use the internal restart interlock, then do not configure any of the universal I/Os as an input for
resetting (see Chapter 4, “Universal I/O connections of the SafeZone Mini” on page 17).
Reset
Note The reset function is often also called “preparation for restart.” In these operating instructions the term reset is used.
If you want to activate the restart interlock on the SafeZone Mini (internal) and also a restart interlock on the machine
(external), then each restart interlock has its own control switch.
After operating the control switch for the internal restart interlock (with protective field unoccupied) …
•
The SafeZone Mini switches its OSSDs to the ON state.
• The LED on the SafeZone Mini illuminates green.
The external restart interlock prevents the machine from restarting. After resetting the SafeZone Mini the operator must
press the control switch to restart the machine controller.
Ensure that the correct sequence is followed!
The controller must be realized such that the machine only restarts if the SafeZone Mini is first reset and then the control
switch for restarting the machine controller is operated.
Reset signals
If the SafeZone Mini safety laser scanner is operated using the “With restart interlock” function, then after a protective
field infringement and the subsequent clearing of the protective field, it requests a reset signal from the control system
(reset required).
The reset signal must be safety-related (single failure proof)!
ATTENTION
ATTENTION
ATTENTION