Leuze electronic RSL 420P - Field Pair Changeover

Functions
Leuze electronic GmbH + Co. KG RSL 420P 38
5.6.3 Start/restart interlock (RES)
When accessing the protective field, the start/restart interlock ensures that the safety sensor remains in the
OFF state after the protective field has been cleared. It prevents automatic release of the safety circuits
and automatic start-up of the system, e.g. if the protective field is again clear or if an interruption in the volt-
age supply is restored.
The start/restart interlock has two functions:
• Start interlock
• Restart interlock
NOTICE
For access guarding, the start/restart interlock function is mandatory. The protective device may
only be operated without start/restart interlock in certain exceptional cases and under certain
conditions acc. to ENISO12100.
Using start/restart interlock
Ä In addition to the safety sensor you must also install the reset button. The machine operator starts the
machine with this reset button.
Ä Position the reset button outside the danger zone so that it cannot be activated from the protective
fields and danger zones. The operator must be able to see all danger zones from this position.
Ä Identify the area to be released on the reset button so that its meaning is clear and easy to understand.
Ä Ensure that nobody is in the danger zone before pressing the reset button.
Ä Hold down the reset button for between 0.12s and 4s to enable the safety-related switching signals.
DANGER
Risk of death if start/restart is operated unintentionally!
Ä Ensure that the reset button for unlocking the start/restart interlock cannot be reached from
the danger zone.
Ä Before unlocking the start/restart interlock, make certain that no people are in the danger
zone.
Start interlock
The start interlock function prevents the machine from starting automatically after switching on or after the
supply voltage returns.
The machine only starts when you press the reset button.
Restart interlock
The restart interlock function prevents the machine from starting automatically, as soon as the protective
field is free again. The restart interlock function always includes the start interlock function.
The machine only starts again when you press the reset button.
5.7 Field pair changeover
The safety sensor has ten field pairs. Switchover between the field pairs is possible at all times, provided
the operating situation allows this.
Use the field pair changeover when the danger zones vary depending on the activity of the machine or the
operating state, e.g. automated guided vehicles (AGVs), to control the field pair changeover for straight and
curved stretches.
If the rules for field pair changeover are not complied with, the safety sensor signals a fault and the safety-
related switching signals are switched off.
The safety sensor has the following modes for field pair activation and field pair changeover:
• Fixed selection of one field pair
• Selection by signal inputs with the changeover mode Overlapped monitoring
• Selection by signal inputs with the changeover mode Fixed changeover moment