158 Rockwell Automation Publication 450L-UM001D-EN-P - December 2019
Chapter 9 Connected Components Workbench Software
Blanking Overview
To use the blanking features, the transceiver must have either of these plug-ins:
• Catalog number 450L-APR-MU-8 – the muting/blanking plug-in,
• Catalog number 450L-APR-BL-5 – the blanking plug-in
The Bulletin 450L-E light curtain has three types of blanking:
• Fixed blanking
• Floating blanking
• Reduced resolution blanking.
Lens identification and zones help with the implementation of blanking.
Lens Identification
Figure 120 shows an example of the identification of the lenses for both finger
and hand resolution for a light curtain that has a 300 mm (11.81 in.) height.
Notice the following:
• Lens 1 is the lens closest to the connection plug-in (not the cascading plug-
in). This arrangement is especially important for the hand resolution as
lens ‘n’ is not used.
• Both resolutions have the name number of lenses.
• The even-numbered lenses of hand resolution are not used; the lens ‘n’ is
not used.
• The Bulletin 450L transceivers are built on 16 lens segments; the number
of lenses, n, is a multiple of 16.
Figure 120 - Lens Identification Example – 300 mm (11.8 in.) Sensing Height
Connection Plug-ins
Even numbered lenses are not used for hand resolution
Lens 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
Finger Resolution (14mm)
Hand Resolution (30mm)
n=32
Lens 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
n=32
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