One of our most popular products! The ProfiHub B5+ allows for almost any type of PROFIBUS network design - star, tree or linear. If you're considering inserting a spur/stub line, rather consider using a ProfiHub instead. It will mean a much more stable and reliable network. Each channel is electrically isolated which mean that each channel creates an entirely new PROFIBUS RS 485 segment. This also means that troublesome devices or segments can be isolated from the rest of the bus.
It's like having 5 repeaters in one device. Often one will find multiple standard repeaters in the same panel, but with 1m of cable between them trying to achieve a star topology, but the extra cabling gets messy and means more complexity and un-reliability. Remedy this with the ProfiHub! This concept is show in the image below right but with the ProfiHub A5 which is the IP67 variant.