Couplers & I/O modules: Item no. 750-667/000-004 Fail-safe 4/4 channel digital input/output; 24 VDC; 2 A; PROFIsafe1 of 4 Item no. 750-667/000-004 Fail-safe 4/4 channel digital input/output Please wait ... Price and availability after LoginPlease wait ... PU (SPU): 1 PieceAdd to shopping listBuy via Distributor eShopDownloads as zipCompareAdd to WatchlistFind distributorsConfigure Item no. 750-667/000-004 Fail-safe 4/4 channel digital input/output Please wait ... Price and availability after LoginPlease wait ... PU (SPU): 1 PieceAdd to shopping listBuy via Distributor eShopDownloads as zipCompareAdd to WatchlistFind distributorsConfigure