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:
SG4-xx-xxx-OO-X:
Each beam is over the min.
operating threshold and the
number of beam
over the threshold is included
between 25 and 50%
Each beam is over the min.
operating threshold and the
number of beam
over the threshold is included
between 50 and 75%
Each beam is over the min.
operating threshold and the
number of beam
over the threshold is included
between 75 and 100%
a. Delimit the area in which the green LED (( ) is steady through some micro adjustments - for the first and
then for the second unit - so to have the maximum alignment (4) and then place both units in the centre of this
area.
b. 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 SAFE (BREAK) 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 (refer cfr.Controls after first
installation page 24.
c. Switch OFF and ON the device in normal operating mode.
The alignment level is monitored also during device standard operating mode via display (see cfr.Diagnostic
messages page 42)
Once the curtain has been aligned and correctly fastened, the display signal is useful both to check the alignment
and show a change in the environmental conditions (occurrence of dust, light disturbance and so on) via signal
level monitoring.
Ensure that the green LED ( NORMAL OP.) is steady ON.
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