| 摘要 |
<P>PROBLEM TO BE SOLVED: To employ a switching circuit for switching between terminal specifications 1, 2 by means of mechanical switches, and detect a setting error and notify an operator at terminal specification switching. <P>SOLUTION: First to fourth slide switches 35a-35d are disposed between a first input terminal 31 for a trunk signal and a second input terminal 32 for a branch signal, and a first output terminal 33 and a second output terminal 34, to switch signal output states of the output terminals 33, 34 to terminal specifications 1 or 2. Light emitting diodes 67, 68 adapted to turn on or off in accordance with a current direction are disposed between signal output ends of the slide switches 35b, 35d, and a light emitting diode 53 is disposed on a signal input side of the slide switch 35c. A DC power supply E1 supplied from a signal input side of the slide switch 35a drives either of the light emitting diodes 67, 68 to provide a terminal specification indication on a correct switch setting, or drives the light emitting diode 53 to provide an error indication on a wrong switch operation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
