SICK S3000

Operating instructions Chapter 12
S3000
8009942/WK81/2012-11-28 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 145
Subject to change without notice
Technical specifications
12.3 Timing behavior of the OSSDs
T
he S3000 tests the OSSDs immediately after switch on and then at regular intervals. For
this purpose the S3000 briefly switches off both OSSDs (for 300 µs) and checks whether
the channels are electrically isolated during this period.
Ensure that the input electronics on your machine or system do not react to this test pulse
and therefore shut down the machine or system.
Approx. 5 or 15 ms
28)
after the switching on of the OSSDs, the S3000 performs the first
voltage test and then after a half basic response time a second voltage test.
After a further half basic response time of the S3000 there is a shut-down test  , 120 or
240 ms
28)
later a further voltage test . Then the S3000 performs a shut-down test and a
voltage test alternately at an interval of 120 ms or 240 ms
28)
. Fig. 97, Fig. 98 and Fig. 99
show the pulse duration for the individual tests.
28)
At 0.5° or 0.25° angular resolution.
Note
Fig.
96
:
Diagram of the test
pulse at the OSSDs
0.5 × basic response time
120 ms/
240 ms
120 ms/
240 ms
120 ms/
240ms
Approx.
5 ms/
15 ms
  
OSSD1
OSSD2
t
t