Not quite. A Node PC has no functions – at least none that you are trying to model, so does not exhibit behaviour. For example, in @RSE’s model above the Node PC is the Panel. The Panel is what you intend to insert your Behavior PCs into, in this case a button and an LED (the Behavior PCs). The Behavior PCs are what implement the functions (PF) in your architectural design.
May be think of it this way. If you modelled a software service it would be represented by a Behavior PC into which you would insert Physical Functions. For the software service to execute it would need an operating system and either a desktop PC or a server, these you might model as Node PCs. They merely provide the resources for your service to run.