Leuze electronic MLC 520 EX Series User Manual

Functions
Leuze electronic MLC 530 21
The following conditions have to be fulfilled for the OSSDs to switch on:
• The protective field must be free.
• Blanked beams must be interrupted.
• The OSSDs of the upstream device must be switched on or have been switched on simultaneously
within 0.5 s.
Activation of the function
Select operating mode 2 (see chapter 7 „Electrical connection“).
4.7 Blanking, reduced resolution
Blanking functions are used when objects must be located in the protective field for operational reasons.
In this way, these objects can pass through the protective field without triggering a switching signal or
remain permanently in the protective field. A distinction is drawn between fixed blanking (see
chapter 4.7.1) and floating blanking (see chapter 4.7.2) as well as reduced resolution (see chapter 4.7.4).
4.7.1 Fixed blanking
With the “Fixed blanking” function, the safety sensor offers the chance of stationarily blanking up to
10 protective field areas consisting of any number of adjacent beams.
Prerequisites:
• At least one of the two synchronization beams may not be blanked.
• Taught blanking areas must have a minimum distance to each other which corresponds to the reso-
lution of the safety sensor.
• No “shadows may form” in the protective field (see figure 4.2).
Activation of the fixed blanking function without beam tolerance
Select operating mode 1, 2 or 3 (see chapter 7 „Electrical connection“).
Fixed blanking with beam tolerance
Fixed blanking with beam tolerance is used in operating modes 4 and 6 for access guarding, for example
to blank a roller conveyor so that it is resistant to interference.
A contact-based safety sensor, for example a Safety Switch with two positive-guided normal
closed contacts, can be switched in the safety circuit when linking electronic safety-related
switching outputs. Upon closing of this switch, both circuits must be closed simultaneously within
a time tolerance of 0.5 s. Otherwise an error message is created.
If the “Blanking” function is activated, suitable objects must be located within their respective pro-
tective field areas. Otherwise the OSSDs switch to the OFF state even if the protective field is
free or they remain in the OFF state.
WARNING
Faulty application of blanking functions may result in serious injury!
 Only use the function when the objects introduced do not have glossy or reflective top and/or bottom
surfaces. Only matte surfaces are permitted.
 Make sure that objects take up the entire width of the protective field so that the protective field cannot
be accessed from the sides of the objects; otherwise the safety distance with reduced resolution must
be calculated corresponding to the gap in the protective field.
 If necessary, properly mount mechanical locks which are fixed firmly to the object (see figure 4.1) to
prevent the “formation of shadows”, for example from tall objects or crooked installation.
 Monitor the position of the objects and the locks, if applicable, at all times by integrating them electri-
cally into the safety circuit.
 Blankings in the protective field and changes to the protective field resolution should only be performed
by qualified personnel assigned to do this.
 Only give corresponding tools such as a key for the teach key switch to qualified personnel.

Leuze electronic MLC 520 EX Series Specifications

General

Brand	Leuze electronic
Model	MLC 520 EX Series
Category	Lighting Equipment
Language	English