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This is the web edition of the original ⮫ AC500-S safety user manual, version 1.3.2. This web edition is provided for quick reference only. The original safety user manual must be used to meet functional safety application requirements. |
The main safety function of AC500-S safety PLC is to read safety digital and analog inputs to control the safety digital outputs by the safety logic module (safety CPU) according to a user-defined IEC 61131 application program and configuration.
The AC500-S safety PLC can be used as a "de-energize to trip" (normally energized, NE) system. The safe state of the outputs is defined according to the table below:
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Normally energized, NE |
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|---|---|
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Mode according to IEC 61508 |
High-demand or low-demand |
|
Safety function |
De-energize to trip |
|
Safe state |
De-energized outputs |
The purpose of AC500-S safety function is to enable a machine or a process (as a system) to achieve with a given SIL (IEC 61508 and IEC 61511), max. SIL (IEC 62061) and PL (ISO 13849-1) a system safe state. An exemplary safety function on the application level, which can be executed by AC500-S in machinery applications, is the emergency stop.