Couplers & I/O modules: Item no. 750-668/000-004 Fail-safe 4 channel analog input; 0/4 … 20 mA; Differential input; PROFIsafe1 of 5 Item no. 750-668/000-004 Fail-safe 4 channel analog input Please wait ... Price and availability after LoginPlease wait ... PU (SPU): 1 PieceAdd to shopping cartDownloads as zipCompareAdd to WatchlistFind distributorsConfigure Item no. 750-668/000-004 Fail-safe 4 channel analog input Please wait ... Price and availability after LoginPlease wait ... PU (SPU): 1 PieceAdd to shopping cartDownloads as zipCompareAdd to WatchlistFind distributorsConfigure