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SH4 BASE-STANDARD
APPENDIX F
CASCADE SYSTEM
OVERVIEW
This document describes the implementation of multiple light curtains in a system. The
result of this system is defined as cascade.
Up to three SH4 unit can be connected in series as a cascade system.
Cascading is when two or more light curtains are connected to each other, resulting in
one system that functions as a single light curtains.
Advantages of cascading are better monitoring of dangerous areas with presence detec-
tion beyond the vertical detection zone and space and cost savings by using a single
safety unit.
A cascade system will work as a single long unit where optic scan is synchronized
between units in order to avoid mutual interferences. A single couple of OSSDs outputs
will reflect the status of all connected units.
Figure 26: Application example
NOTE: OSSDs are physically connected to master unit only; only the master
unit can control their status.
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