ABB 1SAP220500R3001 - DC551-CS31-KBA Digital Bus Module (AC500 S500)

The ABB 1SAP220500R3001 is the order code for the DC551-CS31-KBA digital bus module of the AC500 S500 I/O family, described in distributor catalogs as a bus module with 8 digital inputs (24 VDC) and digital outputs (24 VDC, 0.5 A) on a 1-wire CS31 connection. Listings across multiple stores show consistent descriptions and stock, including used units from surplus inventories. The -KBA designation marks this variant of the DC551-CS31 family; confirm the exact suffix on your installed module before ordering, since the base variant (1SAP220500R0001) carries different internal configuration.