Flex7 eZeBox Expansion Unit is plugged in via an appropriate Expansion Lead or direct ‘unit to unit’ an Expansion Unit, as its name implies, simply expands the capacity of the preceding unit it is plugging into. For example plugging a 4-way Expansion Unit into an 8-way Starter Unit provides a combined unit of 12 ways. Clearly all connected luminaires will operate together, and it is useful to note that where using a plug-in control device it won’t matter which outlet or which unit it is plugged into.