Connected systems are systems on the Project Schematic that are connected together by data links so data can be shared and/or transferred between the two systems. You can use connected systems for sequential physics coupling (for example, thermal-stress) or for sequential simulation steps, such as a pre-stress modal (stress analysis followed by modal), mode-superposition (modal followed by harmonic), and so on. You can either create connections between existing systems or create a new system that is connected to an existing system.