Functions
Leuze electronic
MLC 520S
14
4
Functions
An overview of features and functions of the safety sensor can be found in chapter “Device descrip-
tion” (see chapter 3.1 "Device overview of the MLC family").
Overview of functions
• Start/restart interlock (RES)
• EDM
4.1
Start/restart interlock RES
After 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.
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 ISO 12100.
WARNING
Deactivation of the start/restart interlock may result in serious injury!
Ä
Implement the start/restart interlock on the machine or in a downstream safety circuit.
Using start/restart interlock
Ä
Wire the MLC 520S receiver appropriately for the desired function (see chapter 7 "Electrical connec-
tion").
The start/restart interlock function is activated or deactivated through appropriate wiring
Switching the safety sensor back on after shutting down (OFF state):
Ä
Press the reset button (press/release between 0.15 s and 4 s)
NOTICE
The reset button must be located outside the danger zone in a safe place and give the operator
a good view of the danger zone so that he/she can check whether anyone is located in it (ac-
cording to IEC 62046) before pressing the reset button.
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.
After the reset button has been actuated, the safety sensor switches to the ON state.
