The Extender is a Somfy Digital Network™ (SDN) bus distribution component
that is used to refresh a segment’s capacity or to create a new bus segment in
the middle of an existing bus segment. The Extender’s additional isolated bus
segment supports 255 devices and 4000 ft. of bus wiring per segment, and
supplies 100 power units. Additional isolated bus segments enable bus line
extension for hard-to-reach places over an extended distance