Couplers & I/O modules: Item no. 753-667/000-004Fail-safe 4/4 channel digital input/output; 24 VDC; 2 A; PROFIsafe1 of 4 Fail-safe 4/4 channel digital input/output; 24 VDC; 2 A; PROFIsafePlease wait ...Add to shopping cartGenerate DatasheetCompareAdd to Watchlist Fail-safe 4/4 channel digital input/output; 24 VDC; 2 A; PROFIsafePlease wait ...Add to shopping cartGenerate DatasheetCompareAdd to Watchlist