48 Rockwell Automation Publication 450L-UM001D-EN-P - December 2019
Chapter 4 Safety Function
Cascading
The cascading feature is only available for the 450L-E safety light curtain. A
450L-B safety light curtain can only be used as the last pair of a cascaded system.
Cascading is enabled by the insertion of an additional cascading plug-in
(450L-APC-IO-8) at the top cascading end of the stick. Depending on the
configuration of the DIP switches at the connection plug-in module, the
functions of the I/Os at the cascading plug-in can be changed (for example, for
muting applications). The different settings for the pins of the cascading plug-in
are provided in Table 39 on page 93
through Table 42 on page 94.
As soon as the 450L-APC-IO-8 cascading plug-in is inserted, the I/Os of the
cascading plug-in provide the option to connect an additional 450L safety light
curtain with an 8-pin connection in series (see Figure 23 on page 49
). This
feature allows up to four pairs of 450L-E safety light curtain transmitters and
receivers to be interconnected in series.
Figure 22
and Figure 23 on page 49 specify the nomenclature that is used for
cascaded systems.
Figure 22 - Nomenclature Used for a Noncascaded Setup
IMPORTANT Cascading with the 450L-APC-IO-8 cascading plug-in requires a minimum
distance between two adjacent cascaded pairs (Figure 24 on page 50
).
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