Couplers & I/O modules: Item no. 753-4242-channel digital input; 24 VDC; Intruder detection1 of 4Color: Item no. 753-424 2-channel digital input; 24 VDC; Intruder detectionPlease wait ...PU (SPU): 1 PieceAdd to shopping listGenerate DatasheetCompareAdd to WatchlistFind distributorsConfigureItem no. 753-424 2-channel digital input; 24 VDC; Intruder detectionPlease wait ...PU (SPU): 1 PieceAdd to shopping listGenerate DatasheetCompareAdd to WatchlistFind distributorsConfigure