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Siemens AG
Entry type: FAQ Entry ID: 74562495, Entry date: 06/19/2018
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SIRIUS Safety Integrated: Emergency stop and protective door monitoring to SIL 3 or PL e with a safety relay

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  Task Protective doors are frequently used to fence off danger zones. These are monitored for position and, if necessary, the area from which the hazard emanates is switched off. An emergency stop command device is additionally monitored for shutting down the machine in an emergency. ...

 

Task

Protective doors are frequently used to fence off danger zones. These are monitored for position and, if necessary, the area from which the hazard emanates is switched off. An emergency stop command device is additionally monitored for shutting down the machine in an emergency.

Solution

The safety relay SIRIUS 3SK1 monitors the two safety switches as well as the two emergency stop contacts via an additional input expansion. When the emergency stop command device is actuated or the protective door is opened, the safety relay opens the enabling circuits and switches the power contactors off in a safety-related way.
If the door is closed, the emergency stop command device is unlatched and the feedback circuit is closed, the Start button can be used to switch on again.

 

Downloads

Content of Downloads

Download

Wiring diagrams   Wiring_Emergency_stop_Protective_door_3SK1_SIL3.zip ( 106 KB )
Project for Safety Evaluation Tool Emergency_stop_and_Protective_door_SIL3_3SK1_set.zip ( 37 KB )
CAx download
Configurators

 

Filter criteria: 

Hardware platform:  Safety, SIRIUS
Software:  nine
Entry contens:  Application Examples