≈ 35 ms
1
2
3
1
2
3
OSSD2
OSSD1
40 ms
120 ms
120 ms
120 ms
t
t
Figure 77: Diagram of the test pulse at the OSSDs
Approx. 35 ms after the OSSDs are switched on, the device performs the first voltage
test
1
. Then, after a half basic response time (40 ms), it performs a second voltage
test
1
.
After a further half basic response time of the device there is a shut-down test
2
,
120 ms later a further voltage test
3
. Then the device performs a shut-down test and a
voltage test alternately at an interval of 120 ms. Pulse duration for the individual tests,
,
.
≈ 650 μs
< 300 μs
< 300 μs
OSSD2
OSSD1
Figure 78: Voltage test after switching on the OSSDs
TECHNICAL DATA
12
8010948/ZA21/2020-06-18 | SICK
O P E R A T I N G I N S T R U C T I O N S | S300
131
Subject to change without notice
