Couplers & I/O modules: Item no. 750-4212-channel digital input; 24 VDC; 3 ms; Diagnostics1 of 4Color: Item no. 750-421 2-channel digital input; 24 VDC; 3 ms; DiagnosticsPlease wait ...Add to shopping listGenerate DatasheetCompareAdd to WatchlistFind distributorsConfigureItem no. 750-421 2-channel digital input; 24 VDC; 3 ms; DiagnosticsPlease wait ...Add to shopping listGenerate DatasheetCompareAdd to WatchlistFind distributorsConfigure