| 摘要 |
PROBLEM TO BE SOLVED: To make the detector small, to simplify the detector, to improve the job efficiency and to enhance the safety. SOLUTION: A connector 11 connectable to input and output terminals of relay devices 2, 3, 4 is mounted on a main body 10 of the output detector 5. The output detector 5 is provided with a voltage detection circuit 12 that connects electrically to the connector 11 to detect a prescribed voltage and a voltage display circuit 13 that connects electrically to the voltage detection circuit 12, is operated to informs of detection with the voltage detected by the voltage detection circuit 12. The voltage display circuit 13 consists of a light emitting diode D3 and a buzzer B1. With the connector 11 connecting to the input output terminals of the relay devices, when a prescribed system voltage is applied to the input output terminals, the light emitting diode D3 is lighted and the buzzer B1 sounds a buzzer tone to inform a worker of application of the prescribed system voltage, and when the prescribed system voltage is not applied to the input output terminals, the voltage display circuit 13 is not active to inform the worker of non application of the prescribed system voltage. |
