Technical information
Chapter
3
EFI
8012622/Z098/2016-11-07
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
9
Subject to change without notice
Basics
Example 2: Two C4000 in operation as a cascaded system
Two C4000 safety light curtains form a cascaded system. The C4000 Host (1) performs
the actual hazardous point protection on a press. The C4000 Guest (2) performs the
presence detection. The two C4000 are connected together using EFI. The OSSDs on the
C4000 Host are integrated into the machine controller (4). If the protective field of
the C4000 Guest is interrupted by standing behind or by an attempt at crawling
beneath/reaching under, the OSSDs on the C4000 Host are switched via EFI (3) to the
OFF state.
1
3
2
4
Advantages:
•
Up to three safety light curtains can be connected to each other.
•
No additional external circuitry required. Quick to connect.
•
Resolution and protective field height may differ among the individual systems.
Fig. 3: Hazardous point
protection with presence
detection
Fig. 4: Principle of the
cascaded C4000 system
