Functions
Leuze electronic MLC 530 18
Use start/restart interlock
Select operating mode 4 or 6 (see chapter 7 „Electrical connection“)
The start/restart interlock function is automatically activated.
Switching the safety sensor back on after shutting down (OFF state):
Press the reset button (press/release between 0.1 s and 4 s)
After the reset button has been actuated, the safety sensor switches to the ON state.
4.2 EDM contactor monitoring
The MLC 530 safety sensor works in all operating modes without the EDM function.
In case you need this function:
Use a suitable Safety Relay.
The "contactor monitoring" function monitors the contactors, relays or valves connected downstream of
the safety sensor. Prerequisite for this are switching elements with positive-guided feedback contacts
(normal closed contacts).
4.3 Transmission channel changeover
Transmission channels are used to prevent mutual interference of safety sensors which are located close
to each other.
With the factory setting, the safety sensor works in all operating modes with transmission channel C1.
The transmission channel of the transmitter can be switched by changing the supply voltage polarity (see
chapter 7.1.1 „MLC 500 transmitter“).
Select transmission channel C2 on the receiver:
Connect pins 1, 3, 4 and 8 of the receiver and switch it on.
The receiver is switched to transmission channel C2. Switch the receiver off and again disconnect the
connection between pins 1, 3, 4 and 8 before switching the receiver back on.
Re-select transmission channel C1 on the receiver:
Repeat the procedure described above to again select transmission channel C1 on the receiver.
The receiver is switched to transmission channel C1 again.
WARNING
Deactivation of the start/restart interlock may result in serious injury in operating modes 1, 2 and 3!
In operating modes 1, 2 and 3, implement the start/restart interlock on the machine or in a down-
stream safety circuit.
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 before
pressing the reset button.
DANGER
Risk of death if start/restart is operated unintentionally!
Ensure that the reset button for unlocking the start/restart interlock cannot be reached from the danger
zone.
Before unlocking the start/restart interlock, make certain that no people are in the danger zone.
To guarantee reliable operation, the infrared beams are modulated so they can be discerned
from the ambient light. Welding sparks or warning lights, e.g. from passing high-lift trucks, there-
by do not influence the protective field.
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