Reply To: Profibus PA & Slip rings

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#14215 Reply

John Swindall

George, You have a good point.
If the power of the source is limited, then there should be no way a device can cause a problem. But, if that is the case, why do we have ex rated and non-ex rated versions of the same devices that will be downstream from the coupler? I know that intruments and passive components like AFDs and junction boxes all have ex and non-ex versions. I will not recommend a non-rated component for an IS system. I am not a safety engineer.
Anyway, we have exhausted my nickel’s worth of knowledge on Intrinsically Safe slip rings.
I’m looking forward to see if anyone else has any thoughts on this.
regards, John