The SMART system is an intelligent and secure Modbus/IP Ethernet I/O interface. The SMART Remote I/O Adapter includes a 4-port managed Ethernet switch and an embedded firewall. The SMART Adapter, used with SoftPLC's Tealware I/O system, creates a ModbusTCP I/O network. Each SMART Adapter can hold 3 modules or connect to up to 12 locally connected racks (96 modules).