Overview Of Ac500-S Safety Plc; Overview - ABB AC500-S Safety User Manual

Overview of AC500-S Safety PLC

Overview

2 Overview of AC500-S Safety PLC
2.1 Overview
The AC500-S is realized as 1oo2 system (both Safety CPU and Safety I/O modules) and can be used to
handle safety functions with SIL3 (IEC 61508 ed. 2 and IEC 62061) and PL e (ISO 13849) requirements in
high-demand systems of safety machinery applications. 1oo2 system includes two microprocessors. Each of
them executes the safety logic in its own memory area and both compare the results of the execution at the
end of each cycle. If a mismatch in the execution or an error is detected, the system goes to a safe state,
which is described for each of the safety modules separately.
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