Hi,
the current beta version of Collector for ArcGIS is based on a new platform which does not support Trimble GNSS devices at the moment.
Trimble GNSS integration is currently being worked on but not finished in the beta release published March 26.
So if you wanna use Catalyst you need to swap to the official release of Collector for ArcGIS or wait a bit until Esri has finished the implementation of the Catalyst SDK.
Regards
Nico