Couplers & I/O modules: Item no. 750-668/000-004Fail-safe 4 channel analog input; 0/4 … 20 mA; Differential input; PROFIsafe1 of 5 Fail-safe 4 channel analog input; 0/4 … 20 mA; Differential input; PROFIsafePlease wait ...Add to shopping listGenerate DatasheetCompareAdd to Watchlist Fail-safe 4 channel analog input; 0/4 … 20 mA; Differential input; PROFIsafePlease wait ...Add to shopping listGenerate DatasheetCompareAdd to Watchlist