iSMA-B-24I | I/O module with Modbus RTU/ASCII or BACnet MSTP communication. 1xRS485, 24xDI. Power supply 24 V AC/DC SKU: iSMA-B-24I Parent Item Parent Item - Additional Cost Has Item Option Details iSMA-B-24I | I/O module with Modbus RTU/ASCII or BACnet MSTP communication. 1xRS485, 24xDI. Power supply 24 V AC/DC Documentation Data Sheet DetailsDocumentationBackiSMA-B-24I | I/O module with Modbus RTU/ASCII or BACnet MSTP communication. 1xRS485, 24xDI. Power supply 24 V AC/DCBack Data Sheet