
Chapter
7
Operating Instructions
UE 440/470
66
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
8 010 432/P097/14-03-05
Application and switching
examples
A restart interlock is configured for the safety application. A signal lamp (
) indicates that
a reset is required after switch-off of the OSSD. The OSSD of the UE 470 is reactivated by
actuating the connected reset button (
).
Two emergency stop input devices are connected (
) and switch off the press. The
emergency stop input devices are installed at the front and rear of the press and switch
both applications off.
Application A
Application B
$
Reset
$
EDM
$
TDC
$
BDC
$
SCC
$
Reset
$
EDM
Single channel inputs
$
Operating mode selector switch for both applications
$
Enabling switch tested
Dual channel inputs
$
Emergency stop input device tested (switches both
applications)
EFI inputs
$
C 4000
$
C 2000
$
"Reset required" signal lamp
$
"Reset required" signal lamp
Single channel
outputs
$
Two test outputs for testing of single or dual channel inputs
(tests are offset by time for detection of cross-circuits)
Dual channel outputs
$
OSSD A
$
OSSD B
Fig. 43: Components of the
hazardous point protection
with PSDI mode
Tab. 20: Failure probability
according to IEC 61 508 for
the example hazardous point
protection with PSDI mode