Subsystem Definition
This feature is used to define subsystems, which can be inserted as components into the main system using a Subsystem Instance node. Create the subsystem by adding subnodes to the Subsystem Definition node.
Node Connections
Define the number of connecting nodes by adding more nodes or deleting existing nodes and set the Node names at which the subsystem connects to the main system or to other subsystems. The order in which the Node names are defined is the order in which they are referenced by a Subsystem Instance node.
The components constituting the subsystem should be connected only to the subsystem’s nodes and to themselves.
Location in User Interface
Context Menus
Ribbon
Physics Tab with Lumped Thermal System selected: