A device for connecting first and second medical fluid flow systems includes a linear movement carriage system that is positioned within a housing. The carriage system includes first and second connector holders configured to hold first and second connectors of the first and second medical fluid flow systems, respectively. A coupler holder is configured to hold a coupler and is positioned substantially between the first and second connector holders. The first and second connector holders and the coupler holder are relatively moveable between a separated configuration, where the first and second connectors and the coupler are located in relatively spaced apart positions, and a joined configuration, where the first and second connectors engage the coupler. An ultraviolet light source is positioned in the housing so as to irradiate first and second connectors and the coupler. A drive system transitions the first and second connector holders and the coupler holder between the separated and the joined configurations.