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Safety Integrated - Functional Safety in machines and plants

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	Programmable electronic control components (e.g. standard PLC or standard AS-i) and application of ISO 13849-1
	Disconnecting series connected EMERGENCY-STOP commanding devices represents individual supplementary safety function by EN 62061
	SILCL 1 is attainable with a subsystem consisting of an electromechanical component and a 1-channel architecture.
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	Attainable SIL acc. to IEC 61511 of subsystems or subsystem elements consisting of SIRIUS components with low demand mode acc. to IEC 61508
	3WL - B10/B10d values and part of dangerous failures

Disconnecting series connected EMERGENCY-STOP commanding devices represents individual supplementary safety function by EN 62061

Part number:

QUESTION:

If several EMERGENCY-STOP commanding devices are electrically connected in series, does every safety-related disconnection via an EMERGENCY-STOP commanding device represent an individual supplementary safety function ?

ANSWER:

IEC 62061 – Application Explanations:

If several EMERGENCY-STOP commanding devices are electrically connected in series, every safety-related disconnection via an EMERGENCY-STOP commanding device represents an individual supplementary safety function.

The explanations in attached document are to address these issues.

Anymore questions?
Please consult Siemens Low Voltage Switchgear - Technical Assistance via mail adress or phone number, as shown in the header of the attached document.

IEC62061_Info_3_en.pdf ( 35 KB )

Entry ID:35444028

Date:2009-04-21

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