| 摘要 |
<p>PURPOSE:To detect mis-wiring with a simple method after the work is completed by using a detection section to detect a high frequency signal superimposed on each signal line from an information receptacle and using a display section to display the connection state with the output of the detection section. CONSTITUTION:A high frequency signal sending section 6 superimposed a high frequency signal from the information receptacle 3 onto an optional signal line in bus lines L and selects timewise the signal lines. The detection section 7 detects the high frequency signal superimposed on each signal line of the bus lines L. The output of the detection section 7 lights display devices 121-123. When the connection of the bus lines L is correct, all the display devices 121-123 are lighted at first and them they are extinguished in order from the device 121. If there is anymis-connection, the order of extinguishment is changed and if there is any open line, the display devices 121-123 are not lighted.</p> |
