This is the component provided by the Net Splitter.
The net splitter connects networks, just like a cable. But the net splitter faces can be opened or closed, separating networks. A redstone signal inverts the faces. A scrench can be used to open/close a face. The net splitter also has an api to configure the faces.
Component name: net_splitter.
open(side: number):boolean Open the side, returns true if it changed to open.
close():boolean Close the side, returns true if it changed to close.
getSides():table Returns current open/close state of all sides in an array, indexed by direction.
setSides(settings: table):table set open state (true/false) of all sides in an array; index by direction. Returns previous states.