This is not specifically a PLC question, but it deals with interfacing I/O.
Does anyone know who manufactures a non-incendive barrier terminal block (not an intrinsic safety barrier) for Class I, Div. 2 hazardous locations.
The searches that I have done only show Wieland Electric. That is fine but I would like to have more options.
In the past, I have used intrinsic safety barriers for "dry-contact" inputs (i.e. Pepperl & Fuchs, Stahl, MTL, ...) but it seems like going with a non-incendive barrier may be less expensive yet still appropriate for my application.
Another issue regarding I.S. vs. non-incendive barriers is the switching current at the dry-contact input device. I.S. barriers supply a much lower voltage/current which may impair the ability of the switch to close the circuit and transfer the signal reliably through the switch. Any opinions?
Thanks.
-Phil
Does anyone know who manufactures a non-incendive barrier terminal block (not an intrinsic safety barrier) for Class I, Div. 2 hazardous locations.
The searches that I have done only show Wieland Electric. That is fine but I would like to have more options.
In the past, I have used intrinsic safety barriers for "dry-contact" inputs (i.e. Pepperl & Fuchs, Stahl, MTL, ...) but it seems like going with a non-incendive barrier may be less expensive yet still appropriate for my application.
Another issue regarding I.S. vs. non-incendive barriers is the switching current at the dry-contact input device. I.S. barriers supply a much lower voltage/current which may impair the ability of the switch to close the circuit and transfer the signal reliably through the switch. Any opinions?
Thanks.
-Phil