| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that when a plurality of relays are operated by one drive circuit, the plurality of relays remain in an energization state due to failure of the drive circuit.SOLUTION: A drive circuit (30) has a coil (31), a first power line (SL1), a second power line (SL2), and sensors (33, 34, and 35). The first power line is a line for supplying a current having a second current value from a power supply to the coil and includes a first switch element (SW1) and a second switch element (SW2). The second power line is a line for supplying a current having a first current value from the power supply to the coil and includes a second resistive element (R21) and a third switch element (SW3). The sensors change output signals according to an energization state and a non-energization state of each switch element. A controller (40) outputs a control signal causing each switch element to be in the non-energization state and discriminates whether each switch element is faulty in the energization state on the basis of output signals of the sensors. |
