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8 007 487/ 10-10-99 Technical Description • LGT © SICK AG • Safety Systems • Germany • All rights reserved
5.3.9 Behaviour of the
switching outputs
in the various
operating modes
The switching outputs behave as
follows in the various operating
modes (Fig. 22 to 24).
ca. 1s
30 ms
90 ms
Supply
on
voltage
off
Main relay
closed
(make contact)
open
Auxiliary relay
closed
(make contact)
open
Standard switch-on period with start-up test
Fig. 22. Behaviour of the switching outputs after application of the supply voltage in operat-
ing mode "without restart interlock"
30 ms
20 ms
30 ms
< 50 ms
25...110 ms
approx.
100 ms
Control switch
active
passive
Test input
passive
active
Main relay
closed
open
Auxiliary relay
closed
open
Wait for control switch
Fig. 23. Behaviour of the switching outputs after machine initiation switch followed by a
short test request in the operating mode "with restart interlock".
Fig. 24. Behaviour of the switching outputs after machine control initiation followed by long
(
≥
150 ms) test request in the operating mode "with restart interlock"
30 ms
20 ms
30 ms
< 50 ms
> 150 ms
Control switch
active
passive
Test input
passive
active
Main relay
closed
open
Auxiliary relay
closed
open
Wait for control switch
Wait for control switch
