Chapter
3
Technical information
EFI
8
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8012622/Z098/2016-11-07
Subject to change without notice
Basics
3.2
Function expansion by connecting ESPE
By connecting together individual ESPE via EFI additional applications become possible.
Example 1: Two S300 in host/guest operation
1
3
2
4
The S300 safety laser scanners are connected to a host/guest system via an EFI connec-
tion. It is then possible, for instance, to realize vehicle monitoring in two directions of
movement.
The guest (2) receives the incremental encoder values (4) from the host (1) over the EFI
interface (3). It monitors the areas for the second direction of travel as a function of the
velocity. As soon as there is an object in the protective field, it switches the OSSDs on the
host via the EFI interface to the OFF state (5).
1
3
2
4
5
Advantages:
•
less configuration effort:
– central interface for the configuration of the system
– concurrent monitoring case switching
•
less wiring costs:
– The cables for the input signals only need to be connected to the host.
– One pair of OSSDs is sufficient for the entire system.
•
simplified diagnostics on the host/guest system:
– combined error messages
– central interface for system diagnostics
Fig. 1: Velocity-dependent
vehicle monitoring for bi-
directional travel
Fig. 2: Principle of the S300
host/guest system