/IS220PPRAS1A GE MKVIe, I/O Pack, SPD PROTECT, Safety Rated
IS220PPRAS1A GE MKVIe, I/O Pack, SPD PROTECT, Safety Rated
A protection system is made up of three triple modular redundant (TMR) PPRA I/O packs that are mounted to a TREA terminal board and have a WREA option board attached.