Chapter
7
Operating Instructions
UE 440/470
70
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8 010 432/P097/14-03-05
Application and switching
examples
7.3.3
Hazardous point protection with hazardous area protection
In the example, two separate protected applications are implemented with only one
UE 440. The hazardous point at the turntable of a robot cell is protected via a safety light
curtain C 4000 (
). The hazardous area at the following robot cell is protected via a safety
laser scanner S 3000 (
). Two safety applications were implemented in the UE 440 for
this. The OSSD of the respective safety application is switched off due to the interruption
of a protective field.
The side access door to the front robot cell is monitored by a safety switch (
). If the door
is opened, the safety switch also switches off the OSSD of the front safety application in
the example.
A restart interlock is configured for both safety applications. Two independent signal lamps
(
and
) indicate that a reset is required after one of the OSSDs is switched off. The
respective OSSD of the UE 440 is reactivated by actuating the connected reset button (
and
).
Three emergency stop input devices are connected (
) and switch off both safety
applications (robot cells). Each emergency stop also affects both OSSDs of the safety
controller.
Fig. 48: Hazardous point
protection with hazardous
area protection