Larger installations can use many Zone Controllers, communicating using Ethernet.

Zone Controllers communicate with each other automatically, allowing a Zone to span multiple Zone Controllers. The Zone Controllers synchronise system conditions with each other. All Zone Controllers store the complete project definition. This is all performed without special commissioning or operating actions by the installer or building occupants.

Zone Controllers can be joined together by daisy-chaining: each Zone Controller has a built-in Ethernet switch. Alternatively, external Ethernet switches can be used.