| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a field bus system capable of operating a desired number of field bus devices in a simple manner, and capable of precluding a length of a transmission route from being limited by supply electric power. <P>SOLUTION: The present invention relates to the field bus system used, in particular, in an explosion-hazard area. The field bus system includes a separation element 12 for separating electrically a plurality of bus line sessions 10 including bus lines 3 from the two bus lines of the bus line sessions, and for allowing transmission of a communication signal between the bus line sessions, while preventing a direct current between the bus lines 3, and an electric power supply source 11 for the bus line sessions 10 for supplying the electric power to filed devices connected to the bus line sessions. <P>COPYRIGHT: (C)2008,JPO&INPIT |
