We are looking in to installing a PLC chassi with processor and I/O modules outdoors in a NEMA 4x SS enclosure with a heat strip. The temparature in the enclosure during the summer may go up to 120F or may be more (one of the southern state of US). My concern is, eventhough they (Allen Bradely) are industrial rated, we might have intermittent problems. Has anybody done this before.