DATA TRANSMITTING DEVICE

摘要

PROBLEM TO BE SOLVED: To obtain a data transmitting device by which data transmission with resistance to noise is executed without requiring a dedicated cable and without a complicated work by utilizing existing power lines through the use of a spread spectrum method and transmitting a program or numerical value data. SOLUTION: This system is the one by which the program or numerical data are exchanged through existing electric lighting lines 3 between a personal computer 1 and six NC working machines 2. The signal cable 4 of the personal computer 1 is connected to the electric lighting lines 3 with the data transmitting device 5. In the meantime, the signal cables 6 of the NC working machines 2 are connected to the electric lighting lines 3 with the data transmitting device 5. The data transmitting device 5 transmits the electric signal of the program or numerical data to a target device by sharing the electric lighting lines 3 for supplying AC 100 V and three phases 200 V. Therefore, release from the complicated cable wiring work is attained.