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SIL 2 VSD

Rob Eagle
Anyone know who else does Variable Speed Drives (VSD), other than the Siemens (G120), that can contribute to a SIL 2 safety function?  Even better if they have EMPHASIS certification as well.  Looking for a 7kW drive.


By the way BS EN 61800-5-2 refers to them as PDS(SR)s.


Thank you.


Rob
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    Hello Jonathan,


    Sorry, should have said that the VSD shall perform the safety function in a continuous demand mode.  The safety function requires the VSD to continually control the speed of a fan on a nuclear vent system, the safe state is the fan running in a controlled manner to maintain dynamic containment for a glovebox.


    Rob
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    Hello Jonathan,


    Sorry, should have said that the VSD shall perform the safety function in a continuous demand mode.  The safety function requires the VSD to continually control the speed of a fan on a nuclear vent system, the safe state is the fan running in a controlled manner to maintain dynamic containment for a glovebox.


    Rob
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