5.1 CORRECT ALIGNMENT PROCEDURE
The light curtain alignment can be effected only after having completed the mechanical installation and the
electrical connections as described above.
Compare alignment results with those given in the following table:
Check the green LED ( ) and the yellow LED ( ) on the TX unit. If ON, the emitter is running correctly;
Verify that the sensitive area from the safety light curtain is free;
Verify that one of the following conditions is present on the RX unit:
1. STANDARD CONDITION - NORMAL OP.
Green LED ( ) ON and red LED ( ) OFF.
Both yellow LEDs ( , ) are OFF.
Units are aligned.
2. STOP CONDITION - SAFE (BREAK)
Green LED ( ) OFF and red LED ( ) ON.
The status of both yellow LEDs ( , ) does not matter.
Units are not aligned.
Continue with the following steps to pass from condition 2 to condition 1:
Keep the receiver in a steady position and set the emitter until the yellow LED ( SYNC) is OFF. This
condition shows the effective alignment of the first synchronisation beam.
Rotate the emitter, pivoting on the lower optics axis, until the yellow LED ( LAST) is OFF. Under these
conditions, the SAFE LED shall turn ON.
Delimit the area in which the LED is steady through some micro adjustments - for the first and then for the
second unit - then place both units in the centre of this area.
Fix the two units firmly using brackets.
Verify that the green LED on the RX unit is ON ( ) and beams are not interrupted, then verify that the red
LED turns ON if even one single beam is interrupted (condition where an object has been detected ).
This verification shall be made with the special cylindrical “Test Piece” having a size suitable to the resolution
of the device used.
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