| 摘要 |
PURPOSE:To reduce the cost required for wiring considerably, by connecting the sensor or the operation end at the measuring point and the controller incorporating the computer or the microcomputer by one or two pairs of transmission lines. CONSTITUTION:Plural converters 18 in the field side and microcomputer 19 are connected in parallel by signal line 16 consisting of two lines. Power source 20 in the center side and power ends of transducers 18 are connected in parallel by power line 17 consisting of two lines to supply energy of the power source to transducers 18. Consequently, since computer 19 and all transducers 18 are connected by four lines, the cost required for wiring is reduced. |
