Reer MOSAIC M1 Installation And Use Manual page 109

MODULAR SAFETY INTEGRATED CONTROLLER MOSAIC

Using single channels OSSD, to maintain Safety Integrity Level (SIL) "3" requirements the OSSD
outputs must be independent.

Common cause failures between OSSD outputs must be excluded by observing an appropriate
cable installation (i.e. separate cable paths).
2 single output type function blocks + 1 double output type function blocks
Here below you can find the explanation of the M1S, MI8O4, MO4L, MO4LHCS8 SINGLE-OSSD
configurations.
Manual Reset: If selected this enables the request to reset each time the input signal falls. Otherwise,
output enabling directly follows In input conditions.
8540780 • 10/07/2020 • Rev.38
Example of project
t = 250ms
5s > t1 > 250ms
t2 = 250ms
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