EDM
INSTRUCTION MANUAL
77
The function controls the 24VDC normally-closed contact switching according to the
changes of the OSSDs status.
Figure 17 - EDM timings
The EDM status is antivalent with OSSDs: the timing diagram explains the relationship
between the cause (OSSDs) and the effect (EDM) with the maximum permissible delay.
DLSentinel makes it possible to adjust the maximum permissible delay between 200 and
1000 ms.
Tc <= 350 ms (time between OSSD OFF-ON
transition and EDM test)
To >= 100 ms (time between OSSD ON-OFF transition and EDM test)
(two different times for the mechanical contact driven by a spring)
EDM disabled
When EDM is disabled it is necessary to leave the EDM input floating.
Figure 18 - EDM disabled
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