The FeT series Fieldbus Systems and their Applications Conferences started in 1995 in Vienna, Austria. Since FeT'2001 in Nancy, France, the conference became an IFAC International Federation of Automatic Control sponsored event. These proceedings focus on 13 sessions, covering, fieldbus based systems, services, protocols and profiles, system integration with heterogeneous networks, management, real-time, safety, dependability and security, distributed embedded systems, wireless networking for field applications, education and emerging trends. Two keynote speeches from experts outside Europe are featured. The first one entitled "Bandwidth Allocation Scheme in Fieldbuses" by Prof. Seung Ho, Hanyang University, Korea. The second by, Prof. I.F. Akyildiz, Georgia Institute of Technology, USA, "Key Technologies for Wireless Networking in the Next Decade". This title features 36 high quality papers from 13 countries, and a keynote speech reflecting the current interest of wireless communications for industrial applications. FeT'2005 was supported by a International Program Committee of around 40 members from 15 countries, with 6 from Europe.