A strapping tool has a tensioner for tightening a strap, a sealer for fixing together ends of the strap, a base, and a drive mounted on the base for operating the tensioner and sealer. The sealer or tensioner is a module removably attached to the base. A transponder is provided on the module and a reader on the base for wirelessly communicating with the transponder. A controller is connected to the reader for operating the tool.