Application Note for “Usage of AC500 digital standard I/Os in functional safety applications up to PL c (ISO 13849-1)”, V1.0.0
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Figure 6 shows how dynamic signal is transferred from position switch S1 (there could
be also two position switches, as it is shown in Figure 6, e.g., if PL d (ISO 13849-1)
safety applications have to be realized) to SM560-S Safety CPU and then, if safety
request exists, further through DX581-S to the actuator, which was not shown in Figure
5 for simplicity (refer to [1] on details for connections of actuators to DX581-S outputs).
Figure 6. Sequence diagram for dynamic signal supervision using SM560-S Safety
CPU
The proposed approach with AC500 digital standard I/O modules in functional safety
applications up to PL c (ISO 13849-1) is analysed with more details in an example in
Chapter 3.
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