Yes. The manufacturer insists that CBus pink CAT5 cable be used to wire systems.
This is because it is tested to higher electrical tolerances than standard CAT5 cables, features thicker insulation, is easily distinguishable between other cables in an installation, and also constitutes a validation that you are in compliance with the system wiring requirements for warranty purposes.
The pink outer sheathing of the CBus CAT5 cable is rated to 240V AC as it may, for short runs, be routed into a switchboard close to mains cable. This insulation resistance makes it suitable for this application providing superior performance and immunity from electromagnetic interference (EMI).