Rockwell Automation Publication 450L-UM001D-EN-P - December 2019 23
Operation Chapter 3
Interruption of the sensing field causes the receiver OSSD to switch OFF
(sourced current 0 mA DC, source voltage 0V DC).
For automatic restart: no obstruction of the GuardShield sensing field causes the
two safety outputs (OSSD) to switch to the active high (On) state (+24VDC).
With the appropriate resolution, the GuardShield safety light curtain system
provides finger or hand protection. The resolution corresponds to the diameter
of the provided test rod belonging to the safety light curtain. The test rod is
reliably detected when positioned in the protective field. The resolution of a
GuardShield stick is printed on the product label.
Figure 9
shows the active lenses for the two resolutions of the safety light curtain.
Figure 9 - Active Lenses for Different Resolutions
ATTENTION: The Auxiliary output is only a status output for diagnosis
purposes to connect, for example, an indicator lamp. Do not use this output
for safety purposes.
ATTENTION: The resolution of a 450L-E safety light curtain system that is
configured with blanking, changes depending on the configuration (see
Blanking and Reduced Resolution on page 30
). Any change in the resolution
must be considered in the safety distance calculation (see Determine the
Safety Distance on page 68) and in the installation.
Plug-in
Cable
First Optical Module Second Optical Module
Resolution 14 mm (0.55 in.)
Resolution 30 mm (1.18 in.)
Resolution
[mm (in.)]
Lens Number Per Module
12345678910111213141516
14 (0.56) XXXXXXXXXXXXXXXX
30 (1.19) X—X—X—X—X— X — X — X —
IMPORTANT The gap (approximately 1.5 mm (0.05 in.) between adjacent modules,
which are red (indicated in Figure 9 on page 23
for hand and finger
resolution), has no impact on resolution.
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