| 摘要 |
PROBLEM TO BE SOLVED: To obtain a disconnection detecting device by which a half- disconnection is detected surely and by which a disconnection of a light emitting diode(LED)-type signal light can be detected in advance. SOLUTION: In this disconnection detecting device, a constant voltage is outputted from a constant-voltage transformer 4 while a current flowing to an LED-type signal light 11 is being detected, a cable resistance is adjusted so as to be contact by using a correction resistor 5, and the half-disconnection of the LED signal light 11 is detected stably without being influenced by a change in a power-supply voltage, and without being influenced by a distance up to the installation place of the LED-type signal light 11. |
