4. Safety instrumented systems and safety functions
In calculating the safety figures of the actuator, the following safety functions are
taken into account:
●
Safe end position feedback
An end position signal directly wired to the actuator is available. The safety
function is the correct signal whether the actuator is in the requested actuator
4)
end position or not. Only the signal via this signal communication path is safety
related. End position feedback via I/O interface relay or a positioner (RWG,
MWG, potentiometer, ...) or via a fieldbus interface does not represent a safe
end position feedback.
4) Please note that safety figures only include the components of the actuator . Further components (e.g.
integrity of external controls, gearboxes, valve shaft, other valve components....) are not considered with
the AUMA safety figures related to this product
10
Multi-turn actuators
Safety instrumented systems and safety functions SA .2 with AC(V) 01.2/AC(V)ExC 01.2
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