Schneider Electric BMECRA31210 I/O Expansion ModuleSpecifications Range of Product: Modicon X80 Range Compatibility: Modicon M580 Product or Component Type: I O expansion module Device Application: X80 Ethernet RIO drop adaptor Product Specific Application: For remote I O modules Complementary Bus Type: Bus X across the remote backplane Ethernet across the remote backplane Number of Ports: 3 Integrated Connection Type: 1 port for service or distributed equipment 2 ports for Ethernet RIO Network (RSTP)