The LEDPOINT® PRS has “ia” (intrinsically safe) certification so do I need to use it with safety barriers?
No, safety barriers are not needed simply remove the failed Pellistor and replace it with a LEDPOINT® PRS . This is because only part of the unit drive circuitry is “ia” certified, these circuits are powered through safety barriers contained in the LEDPOINT® PRS upper body. This upper body area contains circuits, which are encapsulated and safety certified “m”. These “m” circuits interface to the installation Pellistor power and signal wires, which will be connected through an Exe junction box and terminals. “m” certification units are certified for use in Zone 1 and 2 areas, as are units with Exd certification.
