24 Rockwell Automation Publication 450L-UM001D-EN-P - December 2019
Chapter 3 Operation
Laser Alignment
All 450L-E transceiver sticks have an integrated laser alignment system (ILAS).
The laser works with visible light, which makes the alignment of a 450L-E safety
light curtain system much easier.
The ILAS can be switched on and off by simply placing a finger on the optical
push button, which is located close to the hand symbol on the front window (see
Figure 31 on page 65
). As soon as the laser is activated, several red laser beams are
transmitted (see Figure 10 on page 25
) from a source close to the optical push
button.
Figure 10 on page 25
shows the principle operation of the ILAS. The brightest
beam is transmitted perpendicular to the front window, which is also parallel to
the infrared light of the stick. The brightest beam has to be positioned at the
opposite stick at the same level as indicated with distance A in Figure 10 on
page 25. The other slanted laser beams must also be targeted between the optics
center and the housing of the opposite stick on the front window. The quantity of
slanted beams on the opposite stick depends on the installation distance. To find
optimum alignment for a 450L-E safety light curtain system, the laser of each
stick must be aligned to the opposite stick.
LASER LIGHT HAZARD: Do not stare into the beam. Each 450L-E safety light
curtain has a built in laser alignment system.
LASER CLASS 2 (IEC 60825-1).
Conforms to 21 CFR 1040.10.
IMPORTANT A white background (for example, paper) makes it easy to identify the
brightest beam.
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