
Chapter
7
Operating Instructions
UE 440/470
68
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8 010 432/P097/14-03-05
Application and switching
examples
7.3.2
Hazardous point protection with interior area protection
The hazardous points at a press are protected via a UE 440 with a safety light curtain
C 4000 (
). The OSSD of the safety application is switched off due to the interruption of a
protective field.
The rear access door to the press is monitored by a safety switch (
). If the door is
opened, the safety switch also switches off the OSSD.
A restart interlock is configured for the safety applications. A signal lamp (
) indicates that
a reset is required after switch-off of the OSSD. The OSSD of the UE 440 is reactivated by
actuating the connected reset button (
).
The interior area of the press is monitored via an S 3000 (
) once the OSSD has switched
off. If a person is found in the interior area of the press, the press is prevented from
starting up, even if the reset button is pressed inadvertently.
Two emergency stop input devices are connected (
) and switch off the press.
Fig. 45: Hazardous point
protection with interior area
protection
Fig. 46: Components of the
hazardous point protection
with interior area protection