| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an adaptor capable of eliminating an improper installation work and confirming whether or not wires are correctly connected by turning on a driver when the wires of a communication circuit are correctly connected to activate a display circuit for raising indication and a communication switching means for outputting a communication signal. <P>SOLUTION: The adaptor includes: input terminals 2 to which communication lines whose polarities are determined are connected and for delivering a signal to each component of the adaptor; a Low Pass Filter (LPF) 3 for receiving the communication signal and extracting the DC component; a regulator 4 for supplying required power; the driver 5 activated by receiving power from the regulator 4; the communication switching means 6 activated by receiving a signal outputted from the driver 5; the display circuit 7 for carrying out indication synchronously with the operation of the driver 5; and output terminals 8 for outputting the communication signal from the communication switching means 6. When the communication wires are correctly connected to the input terminals 2, the driver is activated to allow the display circuit to carry out indication, and the communication signal from the input terminals is outputted to the output terminals. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
